Who this guide is for: Administrators managing employee clock-in using fingerprint on Anviz C2 Pro devices.
Platform: Anviz C2 Pro clocks
Before You Begin
Ensure:
The device is showing as Connected in the Sense Clock Transactions Service > Devices tab
Employees are already synced from Sense HR
You have access to the employee (for fingerprint registration)
💡 Employees already exist on the device — you are registering a fingerprint, not creating a new user.
If employees are not visible:
use Anviz sync from the employee record in Sense HR
Overview
Fingerprint authentication allows employees to clock in and out using a registered fingerprint on the device.
This method is available on:
C2 Pro devices only
In this article, you will learn how to:
Register a fingerprint for an employee
Improve fingerprint reliability
Test and confirm successful clocking
Biometric credentials must be enrolled directly on the clock device.
They cannot be pre-configured remotely and must be registered in person.
How Fingerprint Clock In Works
Employee created in Sense HR
↓
Employee synced to clock
↓
Fingerprint enrolled on device
↓
Employee scans fingerprint
↓
Clock event recorded and sent to Sense HR via the Sense Clock Transactions Service
Fingerprint Registration
Step 1: Open User Management
Press M on the clock keypad
Log in as administrator
Select User and press OK on the keypad
This opens the user list.Select Search and press OK on the keypad
🖊️ Note: For all Anviz devices:
Default Admin ID is 0
Default Password is 12345
It is recommended that you change this.
Step 2: Select the employee
Locate the employee using their User ID or name.
Employees should already exist if synced from Sense HR.Select the employee and press the OK key
💡Tip: You can find the employee’s user ID in either of the following locations:
Sense HR: People > [select profile] > Employment details. The ID is shown in the Time & Attendance ID field
Sense Clock Transaction Service: Go to the Employees tab and check the Employee ID column
Step 3: Register fingerprint
Select Register Fingerprint and press the OK key
Place the finger on the sensor
🖊️ Note: Placing the finger too far onto the sensor or pressing too hard will reduce the quality of the fingerprint.Repeat the scan multiple times as prompted
🖊️ Note: To complete registration, the user should scan their finger five times.
If fewer than 3 out of 5 scans are successful, repeat the registration process.
If the white light under the scanner is not on, the device will not scan.
Remove and reposition the finger until the light activates.
✅ The device will confirm once the fingerprint is successfully registered.
💡 Tip: We recommend registering at least 2 fingers from each hand. To add another finger, simply place it on the scanner — the device will automatically recognise and register it as a new fingerprint.
Step 4: Save
Confirm the registration:
Once the fingerprint is registered, press M on the clock keypad repeatedly to return to the main clock-in screen.
Step 5: Test Fingerprint authentication
Ask the employee to scan their fingerprint
Expected result:
Employee is recognised
Clock event is recorded
The event will sync to Sense HR (via the Sense Clock Transactions Service) automatically.
Fingerprint Best Practices
To improve recognition accuracy:
place the finger flat on the sensor
cover the full sensor area
hold the finger steady during scanning
If recognition is inconsistent, re-enrol the fingerprint.
Important Behaviour
Biometrics are stored on the device
Fingerprint templates are stored locally on the clock.
🖊️ Note: Biometric data is not stored by Sense.
Only a secure biometric template (a mathematical representation of the fingerprint) is used — not the original image or scan.
Credentials sync across clocks
If multiple clocks are installed and Sync employee updates to all clocks is enabled in the Sense Clock Transactions Service > Settings tab:
fingerprint data enrolled on one clock is available on other connected clocks
Employees must exist before fingerprint enrolment
Biometric data should not be registered unless the employee record exists on the device.
If an employee does not exist on the clock:
Go to Sense HR > People > [select profile]
Click More actions (...) menu (upper right)
Click Anviz sync
Common Fingerprint Issues and How to Avoid Them
Gloves or covered hands
Fingerprint scanners require direct contact with the sensor.
Gloves or coverings will prevent fingerprint recognition
Recommendation:
Remove gloves before scanning or use a card instead.
Wet or dirty fingers
Moisture or dirt can affect fingerprint recognition.
Water or dirt may prevent the sensor from reading correctly
Recommendation:
Ensure fingers are clean and dry before scanning.
Very dry skin
Very dry fingers can reduce scan quality.
Recommendation:
Re-enrol the fingerprint or try a different finger if recognition is inconsistent.
Changes to fingerprints over time
Frequent exposure to chemicals or heavy manual work can alter fingerprint patterns.
This may affect recognition accuracy, as the stored template may no longer match.
Recommendation:
Re-enrol the fingerprint if recognition becomes inconsistent.
Multiple failed attempts
Repeated failed scans may indicate:
incomplete enrolment
poor scan quality
incorrect positioning
Recommendation:
Re-enrol the biometric credential.
Special Cases: Identical Twins
Fingerprint authentication can be used reliably for identical twins, as fingerprints are unique to each individual.
Facial recognition may be less reliable for identical twins due to similarities in appearance. In these cases, it is recommended to use fingerprint or card-based authentication.
When to Use Cards Instead of Fingerprints
Fingerprint authentication may not be suitable in all environments.
Consider using NFC cards if:
employees frequently wear gloves
working conditions involve dirt or moisture
Troubleshooting Biometric Issues
Fingerprint not recognised by Anviz device
Check:
Fingerprint was registered successfully
Finger is placed correctly
Sensor is clean
Try re-enrolling the fingerprint.
Employee not found on Anviz device
Possible cause:
• Employee not synced to clock
Resolution:
• Use Anviz sync in Sense HR
• Confirm employee appears in the clock user list
No response from device
Check:
• Device is powered on
• Screen is responsive
• User is enrolled
When to Contact Support
Contact support if:
• Biometric enrolment fails repeatedly
• Multiple users cannot authenticate
• Employees are missing from the device
• Events are not appearing in Sense HR