Biometric Installation

Biometric Installation Work Tasks in School & College

1. Site Survey and Planning
Before starting installation, the technician first visits the school or college campus to understand the complete layout. This includes checking main entry gates, classroom buildings, administrative office, and staff rooms. The purpose of this survey is to decide the best location for biometric devices so that every student and staff member must pass through it during entry and exit. Proper planning is also done for cable routing, network points, and power supply availability to avoid future installation problems and to ensure smooth system performance.

2. Device Selection and Setup
After understanding the requirement, the correct type of biometric device is selected such as fingerprint, face recognition, or multi-biometric system. The selection depends on the number of users, security level, and budget of the institution. Each device is checked before installation for hardware condition, sensor quality, and software compatibility. Initial configuration like date, time, language, and basic settings are completed to make the device ready for field installation.

3. Wiring and Power Connection
The biometric device is installed at a suitable height near the entrance so that users can easily access it. Proper electrical power is provided using adapter or direct supply, and in advanced setups Power over Ethernet (PoE) may also be used. LAN cables are carefully routed through conduit or cable trays to ensure safety and a clean installation. Proper grounding and stable power supply are very important to avoid device damage and data loss.

4. Network Configuration
Each biometric device is connected to the institution’s network using LAN or Wi-Fi depending on system design. A unique IP address is assigned to every device so it can communicate with the central server or attendance software. After configuration, ping tests and connectivity checks are performed to confirm stable communication. This step is very important because without proper network setup, attendance data will not be transferred correctly.

5. Software Installation and Setup
Attendance management software is installed in the main server or admin computer. This software controls all biometric devices and stores attendance data. Devices are added into the software using IP address or serial number. User roles like admin, teacher, student, and staff are created with proper access permissions. Database setup is also completed to store records securely for long-term use.

6. User Enrollment (Registration)
In this step, all students, teachers, and staff members are enrolled into the system. Their fingerprint or face data is captured and stored in the database with a unique ID number. Care is taken during enrollment to ensure accurate data capture so that future recognition works without errors. This process is usually done class-wise or department-wise to manage large numbers of users efficiently.

7. Testing and Verification
After installation and enrollment, multiple real-time tests are conducted. Users are asked to check in and check out to confirm that attendance is being marked correctly. Reports are verified in the software to ensure accuracy. If any issue like duplicate entry, delay, or device mismatch is found, it is corrected immediately. This step ensures the system is fully reliable before final use.

8. Training and Handover
School or college staff are trained on how to operate the biometric system. This includes marking attendance, generating reports, handling basic errors, and managing user data. Admin users are also trained on software backup and device monitoring. After training, the complete system is officially handed over for daily operation.

9. Maintenance and Support
Regular maintenance is important for smooth functioning of the biometric system. This includes cleaning the sensor, checking network connectivity, updating software, and fixing hardware issues. Technical support is provided in case of device failure or software errors. Proper maintenance ensures long life and continuous performance of the system in schools and colleges.

Biometric Installation Hardware Tasks:

Site survey and device location selection (gate, office, classroom entry)
Power supply checking (AC line, adapter, UPS backup)
Device mounting on wall (proper height and position)
Wall drilling and box fitting (back box / surface box installation)
Power cable connection (12V adapter or direct power supply)
LAN cable laying (CAT6/CAT5 cable routing through conduit)
RJ45 connector crimping and testing
Network switch connection (connecting device to switch port)
PoE connection setup (if device supports Power over Ethernet)
Door lock connection (electric lock / magnetic lock wiring if access control)
Exit button installation (inside push button setup)
Door sensor installation (door open/close detection)
Alarm / buzzer connection (if system supports alarm output)
Grounding connection for safety and device protection
Device power ON testing (boot check and display check)
Fingerprint / face sensor checking (hardware response test)
Network connectivity test (device ping / IP check)
Server communication test (device to software connection)
Final installation inspection (cable management and safety check)
Troubleshooting hardware issues (power failure, cable fault, device error)

Biometric Software Tasks

1. User Enrollment (Registration)
In biometric software, the first main task is user enrollment. All employees, teachers, or students are registered in the system with a unique ID. Their fingerprint, face, or card data is captured and stored in the database. During enrollment, details like name, department, shift, and designation are also added. This step is very important because correct enrollment ensures accurate attendance matching in future.

2. Shift Creation and Assignment
Shift creation is used to define working or class timing in the system. Admin creates different shifts like morning shift, day shift, evening shift, or flexible timing. In each shift, IN time, OUT time, grace time, and break time are set. After creating shifts, they are assigned to users or departments. This helps the system understand when a person is expected to come and leave.

3. Attendance Marking (IN/OUT Process)
When a user scans fingerprint or face, the software automatically records IN and OUT time. The system compares the scan time with assigned shift timing. If the user comes within allowed time, it is marked as present. If late, it is recorded accordingly. This automatic process removes manual attendance errors.

4. Late Calculation (Late Count System)
Late count is used to track how many times a user comes after shift starting time. The software checks IN time against shift start time. If a person enters after grace period, it is marked as late. The system can also calculate monthly late count and generate reports. Many organizations use this for discipline control and salary deduction rules.

5. Leave Management
Leave management allows users to apply for leave such as sick leave, casual leave, or annual leave. Admin or HR approves or rejects leave requests in the software. Approved leaves are automatically marked in attendance reports so the person is not counted as absent. This system helps maintain proper attendance records.

6. Overtime (OT) Calculation
Overtime is calculated when a user works beyond their official shift end time. The software checks OUT time and compares it with shift end time. Extra working hours are counted as OT hours. Some systems also convert OT into salary or compensatory leave based on company policy.

7. Reports Generation
The software generates different types of reports like daily attendance, monthly attendance, late report, leave report, and OT report. These reports help management track employee performance and attendance behavior easily. Reports can be exported in Excel or PDF format.

8. Data Backup and System Maintenance
Biometric software also includes backup functions to protect attendance data. Regular backup is taken to avoid data loss. Admin also updates software and checks database performance. Proper maintenance ensures smooth system operation without errors.

Biometric Installation Software Tasks :

User creation / enrollment (fingerprint, face, ID mapping)
Department / group creation (students, teachers, staff, office)
Shift creation (morning, day, night, flexible shift setup)
Shift assignment to users or departments
Device add in software (IP address / device serial number)
Network configuration (LAN/WiFi connection setup)
Attendance rule setup (IN/OUT rules, grace time setting)
Holiday setup (school holidays, office holidays, weekends)
Leave management setup (sick leave, casual leave, approval system)
Late rule configuration (late count, warning, penalty rules)
Overtime (OT) setting (extra working hour calculation)
Access control setup (door entry permission, time restriction)
Real-time attendance monitoring (live IN/OUT status)
Report generation (daily, monthly, late, leave, OT reports)
Data backup setup (auto/manual backup system)
User role setup (admin, operator, HR access control)
Device testing and synchronization with software
System troubleshooting and error correction support

Office Shift Example

1. Shift Setup in Office
In an office environment, the HR department creates a fixed working shift in the biometric attendance system. The common shift is usually from 9:00 AM to 6:00 PM, with a lunch break between 1:00 PM to 2:00 PM. A grace time of 5 to 10 minutes is also added so that employees can enter without being marked late immediately.

2. Employee Attendance Marking
Every employee must scan their fingerprint or face when entering and leaving the office. When an employee comes within the shift time or grace time, the system marks them as present. If they arrive after the allowed time, the software automatically records it as late. Similarly, OUT time is recorded when they leave the office.

3. Late Entry System
If an employee enters after 9:10 AM (assuming 10 minutes grace), the biometric software marks it as late. The system keeps counting late entries for each employee daily and stores it in the database. This helps HR track punctuality and discipline.

4. Early Exit Monitoring
If an employee leaves before 6:00 PM without permission, the system records it as early exit. This affects attendance status and may reduce salary or working hours in the monthly report. It ensures employees complete full working hours.

5. Overtime Calculation
If an employee stays after 6:00 PM for extra office work, the system calculates overtime. For example, if someone works till 7:30 PM, the extra 1.5 hours are counted as OT. This OT is later used for salary payment or compensatory leave.

6. Leave Management in Office
Employees can apply for leave such as sick leave, casual leave, or earned leave using the biometric software or HR portal. Once approved, the system marks that day as leave instead of absent, so attendance records remain correct.

7. Monthly Attendance Report
At the end of the month, the system generates a full report for each employee. It includes present days, late days, leave days, absent days, and overtime hours. HR uses this report for salary calculation and performance evaluation.

1. Daily Attendance Entry
In an office, employees start their day by marking attendance using a biometric device like fingerprint or face scanner. When an employee enters the office gate, they scan their finger and the system automatically records the IN time with date and employee ID.

2. On-Time Attendance Example
If an employee comes at the correct shift time, for example 8:55 AM for a 9:00 AM shift, the system marks the employee as “Present” or “On Time”. This data is directly stored in the attendance software without manual entry.

3. Late Attendance Example
If another employee comes at 9:20 AM, and the grace time is only up to 9:10 AM, the system automatically marks it as “Late”. The software also adds one late count in the monthly attendance record.

4. Multiple Punch System (IN/OUT)
Employees may scan their fingerprint multiple times in a day. First scan is IN time, and last scan is OUT time. Some systems also track break time inside the office if enabled.

5. Early Exit Example
If an employee leaves the office at 5:00 PM instead of 6:00 PM without permission, the system records it as “Early Exit”. This may affect attendance status or salary calculation depending on company rules.

6. Real-Time Monitoring Example
HR or admin can check live attendance from the software. They can see who is present, absent, on leave, or late in real time. For example, at 10:00 AM, HR can see which employees have not yet scanned.

7. Monthly Summary Example
At the end of the month, the system generates a report for each employee such as: Present days: 24, Late: 2, Leave: 3, Absent: 1. This report is used for salary processing and performance tracking.

Example of Office 3 Shift System

1. Overview of 3 Shift System
In some companies, especially IT support, security, call centers, and factories, work is divided into 3 shifts to run 24×7 operations. Each employee is assigned a fixed shift in the biometric system so that attendance and working hours are tracked properly.

2. Morning Shift Example
Morning shift usually runs from 6:00 AM to 2:00 PM. Employees working in this shift must scan their fingerprint between 5:50 AM and 6:10 AM (grace time). If they come after that, the system marks them as late. After completing work, they scan OUT at 2:00 PM.

3. Afternoon (Day) Shift Example
Day shift generally runs from 2:00 PM to 10:00 PM. Employees enter at around 1:50 PM and scan their biometric. The system records IN time and tracks attendance. If an employee leaves before 10:00 PM, it is recorded as early exit.

4. Night Shift Example
Night shift runs from 10:00 PM to 6:00 AM. Employees working in this shift scan IN at 9:50 PM. The system records attendance overnight and marks OUT at 6:00 AM. Night shift employees may also get extra benefits like night allowance or OT.

5. Shift Assignment in Software
In biometric software, HR assigns each employee to a specific shift. For example, security staff may be in night shift, production workers in day shift, and maintenance staff in rotating shifts. The system automatically applies shift rules like late count, OT, and attendance calculation.

6. Overtime in 3 Shift System
If a night shift employee works beyond 6:00 AM, for example until 8:00 AM for emergency work, the system calculates overtime. Similarly, if day shift employees stay extra hours, OT is added in the monthly report.

7. Monthly Report Example
At the end of the month, HR generates reports separately for each shift. It shows present days, late count, leave, absent, and OT hours. This helps management control manpower and payroll for 24-hour operations.

School/College Biometric Attendance Example

1. System Setup Example
In a college, the morning class shift is set from 8:00 AM to 1:00 PM with a grace time up to 8:10 AM. All students must scan fingerprint at the entry gate before going to class. The biometric software automatically records attendance as Present, Late, or Absent based on timing.

2. Student Attendance Example (Real Style Data)

Student 1: Rahul Das
Rahul enters at 7:55 AM and scans fingerprint.

Status: Present (On Time)
Reason: Entered before shift start time

Student 2: Amit Kumar
Amit enters at 8:05 AM and scans fingerprint.

Status: Present (Within Grace Time)
Reason: Inside allowed 10 minutes grace period

Student 3: Suman Ghosh
Suman enters at 8:20 AM and scans fingerprint.

Status: Late
Reason: After grace time (8:10 AM)

Student 4: Priya Sharma
Priya does not come to college and does not scan fingerprint.

Status: Absent
Reason: No biometric entry recorded

3. System Result (Daily Summary Example)
At the end of the day, the system generates a report:

Rahul Das → Present
Amit Kumar → Present (Late count = 0)
Suman Ghosh → Late (Late count +1)
Priya Sharma → Absent

What is Grace Time

What is OT Count (Overtime Count)

1. Definition of OT Count
OT Count (Overtime Count) means the total number of extra working hours or extra working days an employee performs beyond the official shift timing. It is automatically calculated and recorded by biometric attendance or HR software when an employee works after normal duty hours.

2. Basic Concept
Every employee has a fixed shift time such as 9:00 AM to 6:00 PM. If the employee continues working after 6:00 PM, that extra time is considered overtime. The system tracks this extra time and converts it into OT hours and OT count.

3. Real Office Example
In an office, an employee works from 9:00 AM to 6:00 PM as normal duty. But one day he works until 8:00 PM. The system records 2 extra hours. This is counted as OT, and the system adds 1 OT entry for that day.

4. Monthly OT Count Example
If an employee works overtime on 5 different days in a month, then the system will show:

OT Count = 5 days
Total OT Hours = sum of all extra hours from those 5 days

5. Purpose of OT Count
OT Count is used for salary calculation, extra payment, or compensatory leave. It also helps HR to monitor workload, emergency work, and employee performance in the organization.

6. Importance in Biometric System
In biometric software, OT Count is automatically calculated based on IN and OUT time. This removes manual calculation errors and ensures accurate payroll processing and fair compensation.

Manual Punch (Manual Attendance Entry)

1. What is Manual Punch
Manual Punch means recording attendance manually in the system instead of using biometric fingerprint or face scan. In this method, an admin, HR, or operator enters employee IN time and OUT time directly into the software.

2. When Manual Punch is Used
Manual punch is used when biometric device is not working, fingerprint is not matching, power or network problem occurs, or an employee forgets to mark attendance. It is also used for special cases like site visits or emergency work.

3. Real Office Example
In an office, an employee arrives on time but the biometric machine is down due to network failure. HR then manually enters:

IN Time: 9:05 AM
OUT Time: 6:00 PM
This entry is saved as manual punch attendance in the system.

4. Importance of Manual Punch
Manual punch ensures that attendance is not lost due to technical issues. It acts as a backup system and helps maintain complete attendance records in HR software.

Meaning of Outside Work Manual Punch:
Employee outside work manual punch means recording attendance manually when an employee is not in the office but is working in the field or outside location. In this case, biometric device is not used, and HR or supervisor updates attendance in the software.

Real Office Example:
In a company, a sales employee goes to meet a client outside the office. He does not come to the office to scan fingerprint. Instead, he informs HR and the supervisor enters:

IN Time: 10:00 AM (field work start)
OUT Time: 6:00 PM (field work end)
This is marked as outside work manual punch.

What is Biometric Device Add to P.C Software

1. Meaning of Device Add to Software
Device add to software means registering or connecting a biometric machine (fingerprint or face device) with the attendance management software so that both can communicate and share data.

2. Simple Explanation
When a biometric device is installed, it does not work with software automatically. It must be added in the software using device details like IP address, serial number, or device ID. After adding, the software can receive attendance data from that device.

3. Real Example
In a school, a biometric device is installed at the main gate. The IT technician opens the attendance software and adds the device using its IP address like 192.168.1.50. After adding, when students scan fingerprint, their attendance automatically appears in the software.

4. Why Device Add is Important
Without adding the device in software, the system cannot receive attendance data. Even if people scan fingerprint, the software will not record anything. So device adding is required for proper communication between hardware and software.

5. What Happens After Device Add
After successful device addition, the software starts syncing data like IN/OUT punch, user ID, and time. Admin can also monitor device status such as online/offline, memory usage, and real-time attendance.

6. Conclusion
Device add to software is a very important step in biometric installation because it connects the hardware device with the attendance system and makes the whole system work properly.

What is Standalone Biometric

1. Meaning of Standalone Biometric
Standalone biometric is a type of biometric device that works independently without connecting to any computer or server all the time. It stores user data and attendance inside its own internal memory.

2. Simple Explanation
In standalone mode, the biometric machine itself handles enrollment, attendance marking, and storage. You do not need a software or network connection for basic operation. Data can later be exported to a computer using USB or pen drive.

3. Real Example
In a small office or shop, a fingerprint machine is installed at the door. Employees scan their finger, and the device stores IN/OUT time internally. At the end of the week, the admin connects a USB drive and downloads the attendance report into Excel.

4. Features of Standalone Biometric

Works without continuous PC connection
Internal memory storage
Simple installation
Limited users capacity compared to server-based system
USB or pen drive data transfer

5. Where It is Used
Standalone biometric is commonly used in small offices, shops, small schools, gyms, and small organizations where advanced networking or central server is not required.

6. Conclusion
Standalone biometric is a simple and cost-effective attendance system that works independently and is suitable for small setups, but it has limited features compared to network-based biometric systems.

What is Multi-Door (Multi Door Access Control)

1. Meaning of Multi-Door System
Multi-door system means a biometric access control setup where multiple doors of a building are controlled and managed using biometric devices like fingerprint, face recognition, or card access. Each door can be opened or restricted based on user permission.

2. Simple Explanation
In a multi-door system, one software controls several doors in the same office, school, or building. Different users are allowed to access different doors depending on their role. For example, students can enter only classroom doors, while staff can access office and admin rooms.

3. Real Example
In a college, there are 4 doors:

Main Gate Door
Library Door
Staff Room Door
Lab Door

Students can access only Main Gate, Library, and Lab doors. Staff members can access all doors. When a person scans fingerprint at any door, the system checks permission before opening it.

4. How It Works
Each door has a biometric device connected to an electric lock or magnetic lock. When a user scans fingerprint, the software checks user rights. If permission is allowed, the door unlocks; if not allowed, access is denied.

5. Advantages of Multi-Door System

Strong security control
Separate access for different users
Real-time monitoring of each door
Easy management from one software
Reduces unauthorized entry

6. Conclusion
Multi-door biometric system is used in offices, colleges, hospitals, and industries to control access of multiple doors with high security and proper user permission management.

What is Controller in Biometric System (Access Control)

1. Meaning of Controller
A controller is the main device in a biometric access control system that processes all data from the biometric reader (fingerprint/face/card) and decides whether to allow or deny access to a door.

2. Simple Explanation
When a user scans fingerprint on the device, the biometric reader sends the data to the controller. The controller checks user permission from its memory or software connection, and then sends a signal to open or lock the door.

3. Real Example
In an office, an employee scans fingerprint at the door. The biometric reader sends the ID to the controller. The controller verifies that the employee has access permission. If allowed, it sends a signal to the electric lock and the door opens.

4. Types of Controller Use

Single door controller (controls one door)
Multi-door controller (controls 2, 4, 8 or more doors)
Network controller (connected with software/server for centralized control)

5. Components Connected to Controller

Biometric reader (input device)
Electric lock / magnetic lock (output device)
Door sensor (checks door open/close status)
Exit button (manual exit option)
Alarm system (for security alerts)

6. Importance of Controller
The controller is very important because it acts like the brain of the access control system. Without controller, the biometric device cannot operate door locks or make access decisions.

7. Conclusion
Controller in biometric system is the central unit that manages authentication, processes user data, and controls door access based on permission rules.

Components of Biometric Installation

1. Biometric Device (Reader Unit)
The biometric device is the main input unit that captures fingerprint, face, or card data. It is installed at entry points like gates, doors, or attendance areas. It identifies users and sends data to the controller or software.

2. Controller
The controller is the brain of the system. It receives data from the biometric reader, checks user permission, and decides whether to allow or deny access. It also controls door locking and unlocking operations.

3. Electric Lock / Magnetic Lock
This is the output device that physically locks or unlocks the door. When the controller gives permission, the lock opens. It is used for securing doors in offices, schools, and restricted areas.

4. Power Supply Unit (PSU)
The power supply provides electricity to biometric devices, controller, and locks. It usually uses 12V DC supply and may include backup systems like UPS or battery for power failure protection.

5. Exit Button (Push Button)
The exit button is used to open the door from inside without biometric verification. When pressed, it sends a signal to the controller to unlock the door for exit.

6. Door Sensor
The door sensor detects whether the door is open or closed. It helps in security monitoring and sends alerts if the door is left open or forced open.

7. Network Switch / Router
In network-based systems, switches or routers connect biometric devices to the server or software. It helps in data communication and real-time attendance monitoring.

8. Attendance Software / Server
This is the central system where all attendance data is stored and managed. It processes IN/OUT logs, generates reports, and manages users, shifts, and permissions.

9. Cables and Wiring (LAN, Power, Signal)
Different types of cables are used for installation such as LAN cables for network, power cables for electricity, and signal cables for door control and sensors.

10. Backup System (UPS / Battery)
Backup power systems ensure that biometric devices continue working during power failure. It keeps the system active and prevents data loss.

Conclusion

All these components work together to create a complete biometric attendance and access control system used in offices, schools, colleges, and industries for security and attendance management.

What is EM Lock (Electromagnetic Lock)

An EM Lock (Electromagnetic Lock) is an electronic locking device that uses magnetism to lock and secure a door. It is commonly used in modern access control and security systems for offices, apartments, banks, hospitals, and commercial buildings.
An EM lock consists of two main parts: an electromagnet installed on the door frame and a metal armature plate attached to the door. When electric power flows through the electromagnet, it creates a strong magnetic force that attracts the metal plate and keeps the door locked securely.
The lock remains engaged only while electricity is supplied. When the power is turned off or interrupted, the magnetic force disappears and the door unlocks automatically. Because of this feature, EM locks are known as fail-safe locking systems.
EM locks are often connected with access control devices such as fingerprint scanners, RFID card readers, keypads, push buttons, and biometric systems. Authorized users can unlock the door electronically without using a traditional key.
These locks are available in different holding strengths such as 300 lbs, 600 lbs, and 1200 lbs depending on the security requirement and type of door installation. Stronger EM locks are generally used for commercial or high-security areas.
EM locks are popular because they provide fast operation, high durability, low maintenance, and easy integration with security systems. However, since they depend entirely on electrical power, backup power systems like UPS or batteries are often used to keep them functioning during power failures.

What is EM Lock 600LBS 1200LBS?

The terms 600 lbs and 1200 lbs in an EM lock refer to the holding force or magnetic strength of the lock. It means how much pulling force the electromagnetic lock can resist before the door opens.
For example, a 600 lbs EM lock can hold a door closed with a magnetic force of approximately 600 pounds. It is commonly used for lightweight doors such as small office doors, wooden doors, or single glass doors.
A 1200 lbs EM lock has much stronger magnetic holding power. It is mainly used for heavy doors, commercial entrances, metal doors, and high-security areas where stronger locking strength is required.
The higher the lbs rating, the stronger the lock will hold the door. Choosing the correct EM lock depends on the door size, weight, and security requirement of the building or facility.

Real Example of 600LBS And 1200LBS Em Lock:

A real example of a 600 lbs EM lock is a small office glass door. Suppose a company has a single glass entrance door with an RFID card access system. Since the door is lightweight, a 600 lbs electromagnetic lock is strong enough to keep it securely locked during normal use.
A real example of a 1200 lbs EM lock is the main entrance of a commercial building or server room. These doors are usually heavy metal or wooden security doors. A stronger 1200 lbs EM lock is used so the door cannot be forced open easily and can provide higher security protection.
For example, a bank server room may use a 1200 lbs EM lock connected with fingerprint access control and CCTV monitoring. Only authorized staff can unlock the door, while the strong magnetic force keeps the door tightly secured.

Real Example of an EM Lock

A real example of an EM lock can be seen in an office access control system. In many corporate offices, employees use RFID ID cards or fingerprint scanners to enter restricted rooms. An electromagnetic lock is installed on the glass or wooden door. When an employee scans their authorized card or fingerprint, the access control system temporarily cuts power to the EM lock, allowing the door to open. After the door closes, power is restored and the lock becomes secure again.
Another common example is in apartment buildings or hotels where residents use key cards or intercom systems to unlock the main entrance. The EM lock keeps the entrance door securely locked from outside visitors. When a resident uses their access card or the security desk grants permission remotely, the magnetic lock releases for a few seconds so the person can enter safely.
Hospitals and laboratories also use EM locks to secure sensitive areas such as medicine storage rooms, server rooms, or restricted laboratories. Only authorized staff members with proper access credentials can unlock these doors, helping maintain safety and security within the facility.

EM Lock Brackets

L Bracket EM Lock

ZL Bracket EM Lock

U Bracket EM Lock

What is Feedback EM Lock

A Feedback EM Lock is an electromagnetic lock that can send the lock status information back to an access control system.

A normal EM lock only locks and unlocks the door. But a feedback EM lock has an additional built-in sensor that tells the system whether the door is properly locked or not.

This feedback signal is commonly called:

Lock Status Sensor (LSS)
Door Status Feedback
Monitoring Output

For example, in an office access control system, when the EM lock is energized and the door is fully closed, the feedback sensor sends a signal to the controller showing:

Door Locked = YES

If the door is open, not aligned properly, or the magnet is not holding correctly, the system can detect:

Door Locked = NO

This feature is useful in:

Banks
Server rooms
Data centers
High-security offices
Alarm systems

Real example:

Suppose a server room uses a fingerprint access system with a feedback EM lock. After the door closes, the access controller checks the feedback signal. If the door is not fully locked, the system can trigger an alarm or show a warning on the security software.
Feedback EM locks improve security because the system can monitor the actual lock condition instead of assuming the door is locked.

Real Example:

A real example of a feedback EM lock can be seen in a company server room. The server room door uses a fingerprint access control system with a 1200 lbs feedback EM lock.
When an authorized employee scans their fingerprint, the access controller temporarily removes power from the EM lock, allowing the door to open. After the employee enters and the door closes, the EM lock becomes active again.

At this time, the feedback sensor inside the lock checks whether the armature plate is properly attached to the magnet. If the door is fully closed and locked, the system shows:

“Door Locked Successfully”

If the door is not closed properly or someone keeps the door slightly open, the feedback signal informs the security system:

“Door Not Locked”

The system may then:

Trigger a buzzer alarm
Send a warning to the security software
Show an alert on the guard’s monitor

This helps prevent security risks in important areas like server rooms, banks, laboratories, and data centers.

What is Exit Button

An Exit Button is a switch used to unlock a door from inside a secured area. It is commonly used with EM locks and access control systems.
When a person presses the exit button, it sends a signal to the access controller or relay, which temporarily cuts power to the EM lock. This releases the magnetic lock and allows the door to open.

Exit buttons are usually installed near the door on the inside of:

Offices
Apartments
Server rooms
Hospitals
Commercial buildings

There are different types of exit buttons such as:

Push button exit switch
Touch sensor exit button
No-touch infrared exit sensor

Real example:
In an office with an EM lock door, employees enter using an RFID card reader. To leave the office, they simply press the exit button near the door. The EM lock unlocks for a few seconds, allowing them to exit easily.

Real example:

A real example of an exit button is in a company office glass door with an EM lock and RFID card system.
Inside the office, near the main exit door, there is a small push button fixed on the wall. When an employee wants to leave the office, they do not need a key or card. They simply press the exit button.
As soon as the button is pressed, it sends a signal to the access control system, which cuts power to the electromagnetic lock for a few seconds. The magnetic force stops, and the door becomes free to open.
Another real example is in a hospital emergency exit door. Staff can quickly press the exit button to open the EM lock door and leave the restricted area without delay.
In many modern buildings, even touchless exit buttons are used. You just wave your hand near the sensor, and the door unlocks automatically for safe and hygienic exit.

What is No-Touch Exit Button?

A No-Touch Exit Button Sensor is a device used in access control systems to open a door without physically pressing a button.
It works using infrared (IR) or motion sensing technology. When a person moves their hand near the sensor (usually 5–15 cm distance), it detects the motion and sends a signal to the controller or relay. This temporarily cuts power to the EM lock, allowing the door to open.
This type of exit system is commonly used with electromagnetic locks in places where hygiene and convenience are important.

Real Example:

In a hospital operation theatre or clean room, staff cannot touch surfaces to avoid contamination. So a no-touch exit sensor is installed near the door. When a doctor or nurse waves their hand in front of the sensor, the EM lock releases and the door opens automatically.

Other real uses:

Office buildings with glass doors
Laboratories
Shopping malls
Modern secure apartments

What is Radar Sensor And Microwave Sensor

A radar sensor is an electronic device that uses radio waves to detect movement, distance, or presence of an object or person.
It works by sending out radio signals and then measuring the signal that comes back after reflecting from an object. By analyzing this reflection, it can detect if someone is moving, how far they are, and sometimes even their speed.
Radar sensors are often used in automatic door systems, security systems, and industrial automation.

Real example:

In a modern automatic sliding door at a shopping mall, a radar sensor is installed above the door. When a person walks toward the door, the sensor detects movement using radio waves and automatically opens the door without any touch.

Another example:

In an access control system with an EM lock, a radar-based exit sensor can detect when a person approaches the door from inside. It then sends a signal to unlock the EM lock so the person can exit without pressing a button.

Key feature:

Unlike infrared sensors, radar sensors can detect movement even through some materials and work better in dust, smoke, or low light conditions.

Here are real-life examples of radar sensors:

In a shopping mall automatic sliding door, a radar sensor is installed above the entrance. When a person walks toward the door, the sensor detects their movement using radio waves and automatically opens the door without any touch.
In a parking gate system, radar sensors are used to detect a vehicle approaching the barrier. As soon as the car comes near, the sensor sends a signal to open the gate automatically.
In a modern office with EM lock doors, a radar exit sensor is placed inside near the door. When someone walks toward the door from inside, the sensor detects movement and triggers the EM lock to release so the person can exit without pressing any button.
Another example is in automatic lighting systems, where radar sensors detect motion in a room or corridor and turn the lights ON when someone enters, then turn them OFF when the area is empty.

What is Microwave Sensor?

A Microwave Sensor is a motion detection sensor that uses microwave radio waves to detect movement of people or objects.
The sensor continuously sends microwave signals into an area. When a person or object moves, the reflected waves change, and the sensor detects that movement.
Unlike normal infrared sensors, microwave sensors do not need direct heat detection. They can detect movement through some thin materials like glass, plastic, or wooden panels.

Real example:

In an automatic sliding door at a supermarket, a microwave sensor is installed above the entrance. When a customer walks toward the door, the sensor detects movement and automatically opens the door.

Another real example:

In an office access control system with an EM lock, a microwave exit sensor is installed near the door. When a person approaches the door from inside, the sensor detects motion and sends a signal to release the EM lock for exit.

Common uses:

Automatic doors
Security alarms
Motion lights
Smart building systems
Parking gate automation

Advantages:

Long detection range
Works in darkness and smoke
Fast response
Contactless operation

Are radar sensors and microwave sensors the same?

Yes, a radar sensor and a microwave sensor are very similar, and in many access control or automation systems people use the terms interchangeably.
A microwave sensor is actually a type of radar sensor that uses microwave-frequency radio waves to detect movement or presence.

What is RFID

How RFID Works

RFID (Radio Frequency Identification) works by using radio waves to identify and track objects or people without contact.

How RFID Works

An RFID system has three main parts: a tag (card/chip), a reader, and a controller/system.
When the RFID card or tag comes near the reader, the reader sends out a radio signal. The tag receives this signal and responds by sending back its unique ID number. The reader then captures this data and sends it to the controller or software for verification.
If the ID is authorized, the system can perform an action such as unlocking a door, opening a gate, or recording attendance.

Real example

In an office access system, an employee uses an RFID card to enter the building. When the card is placed near the reader, the system checks the ID and, if valid, it sends a signal to the relay to unlock the EM lock door automatically.

Key point

RFID works completely wirelessly, and no physical contact or swiping is required.

Do we have to enroll the card first in Access Controler

Yes, in RFID access control systems, you must first enroll (register) the card in the system before it can be used.

Real example of card enrollment

In an office building, the security admin uses an access control software or device. First, a new employee is added to the system. Then the employee is given an RFID proximity card.
The admin goes to the controller or software and selects “Add User / Enroll Card” mode. After that, the employee simply places the card near the RFID reader. The system reads the card’s unique ID number and saves it in its database.
Now the card is officially registered (enrolled) in the system.

After enrollment

When the same employee later uses the card at the door, the reader checks the stored ID. If it matches the database, the EM lock opens and the person is allowed inside.

Simple idea

First step = Enroll card (save ID in system)
Second step = Use card (access granted if ID is valid)

Without enrollment, the card will not work, even if it is a valid RFID card.

Does a Biometric Device Have Inbuilt RFID

What is Proximity Card

A Proximity Card, also known as a Prox Card, is a contactless electronic card used in access control and security systems. It allows authorized users to unlock doors or gain access to restricted areas without using a traditional key.
The card works using RFID (Radio Frequency Identification) technology. Inside the card there is a small electronic chip and antenna. When the card is brought near a card reader, the reader sends radio signals to the card and reads its unique identification number.
Unlike magnetic swipe cards, a proximity card does not need to be inserted or physically touched to the reader. The user only needs to place the card close to the reader for the system to recognize it.
Proximity cards are commonly used in offices, apartments, hotels, hospitals, parking systems, and secure buildings. They are often connected with EM locks, electric locks, and access control systems.
For example, in a company office, employees use proximity cards to enter the main entrance. When the card is shown near the RFID reader, the access control system checks authorization and unlocks the door automatically.
These cards are popular because they are fast, convenient, durable, and more secure than ordinary keys. Different types of proximity cards are available, including 125 kHz RFID cards and high-frequency smart cards used in modern security systems.

Types of Proximity Cards

There are different types of access control and proximity cards used in security systems. Each type works with different technologies and frequencies.

Low-Frequency (LF) Proximity Card – 125 kHz

Low-Frequency proximity cards operate at 125 kHz and are the most commonly used cards in basic access control systems. These cards usually contain only a unique identification number and are widely used in offices, apartments, attendance systems, and parking access control.

High-Frequency (HF) Smart Card – 13.56 MHz

High-Frequency smart cards operate at 13.56 MHz and provide better security compared to low-frequency cards. They support encryption and can store more information. These cards are commonly used in modern office buildings, hotels, and secure facilities.

Ultra-High Frequency (UHF) Card

Ultra-High Frequency cards are designed for long-distance reading. They are mainly used in vehicle access systems, toll collection, parking management, and industrial tracking systems where cards need to be detected from several meters away.

Passive RFID Card

Passive RFID cards do not contain an internal battery. They receive power from the RFID reader itself and then transmit their stored identification data. Most standard proximity cards used in daily access control are passive cards.

Active RFID Card

Active RFID cards contain a built-in battery, allowing them to transmit signals over longer distances. These cards are often used in large industrial areas, vehicle tracking systems, and high-range monitoring applications.

Semi-Active (Semi-Passive) RFID Card

Semi-active or semi-passive RFID cards also contain a battery for internal operations, but they still rely partly on the reader signal for communication. These are used in some specialized security and monitoring systems.

MIFARE Card

MIFARE cards are a popular type of smart proximity card operating at 13.56 MHz. They support secure data storage and encryption, making them suitable for office security systems, public transportation, hotel access, and cashless payment systems.

HID Proximity Card

HID proximity cards are widely used branded access cards in commercial buildings and corporate offices. They are known for reliability and compatibility with professional access control systems.

Key Fob / RFID Tag

Key fobs or RFID tags are small keychain-style proximity devices that work similarly to proximity cards. They are commonly used in apartments, parking systems, and residential access control because they are compact and easy to carry.

Dual-Frequency Card

Dual-frequency cards support both low-frequency and high-frequency technologies in a single card. These are useful in organizations upgrading from older systems while still maintaining compatibility with existing readers.

Biometric Smart Card

Biometric smart cards combine RFID technology with biometric verification such as fingerprints for higher security applications. These are mainly used in sensitive areas like research labs, government facilities, and secure data centers.

Card Range?

125 kHz LF Proximity Card – 2 cm to 15 cm range
13.56 MHz HF Smart Card – 2 cm to 10 cm range
MIFARE Card – 2 cm to 10 cm range
HID Proximity Card – 5 cm to 15 cm range
UHF RFID Card – 1 meter to 12 meters range
Passive RFID Card – varies from 2 cm to 10 meters (type dependent)
Active RFID Card – 20 meters to 100+ meters range
Semi-Passive RFID Card – 10 meters to 50 meters range
Key Fob / RFID Tag – 2 cm to 10 cm range
Dual-Frequency Card – 2 cm to 15 cm range
Biometric Smart Card – 2 cm to 10 cm range
Mobile NFC/Bluetooth Credential – 2 cm to 10 meters range

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What is Radar Sensor And Microwave Sensor

Real example:

Another real example:

Common uses:

Advantages:

What is RFID

How RFID Works

How RFID Works

Real example

Key point

Do we have to enroll the card first in Access Controler

Real example of card enrollment

After enrollment

Simple idea

Does a Biometric Device Have Inbuilt RFID

Clear explanation:

Real example:

Important point:

What is Proximity Card

Types of Proximity Cards

Low-Frequency (LF) Proximity Card – 125 kHz

High-Frequency (HF) Smart Card – 13.56 MHz

Ultra-High Frequency (UHF) Card

Passive RFID Card

Active RFID Card

Semi-Active (Semi-Passive) RFID Card

MIFARE Card

HID Proximity Card

Key Fob / RFID Tag

Dual-Frequency Card

Biometric Smart Card

125kHz Access Card Proximity RFID Smart Card

UHF RFID Card

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Finger Print & Mifare Card Reader RS ₹ 15,900

MIFARE 13.56 Mhz Card

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