Fingerprint Sensor


Fingerprint Sensor


SKU: SEN-079 - Mfg Part Number: ZFM-20


Have you ever wanted to add some form of biometric security to your project? This fingerprint sensor simplifies the process of fingerprint detection, storage, and verification. Inside the sensor is a high power DSP chip that does all image rendering, calculation, feature finding, and searching. The onboard FLASH memory can store up to 162 fingerprints.

The sensor is relatively easy to use with any TTL capable microcontroller or system. Below we have linked to a comprehensive tutorial Adafruit has put together for this sensor. There is also free Windows based software available – this makes testing (and viewing) fingerprints very straight forward (but you will need a TTL serial cable!)


  • Voltage: 3.6 – 6.0VDC
  • Fingerprint imaging time: <1.0 seconds
  • Window area: 14mm x 18mm
  • Safety ratings (1-5 low to high safety)
  • False Acceptance Rate: <0.001% (Security level 3)
  • False Reject Rate: <1.0% (Security level 3)
  • Baud rate: 9600, 19200, 28800, 38400, 57600 (default is 57600)
  • Operating current: 120mA max
  • Peak current: 150mA max
  • Signature file: 256 bytes
  • Template file: 512 bytes
  • Storage capacity: 162 templates
  • Interface: TTL Serial
  • Working humidity: 40%-85% RH
  • Full Dimensions: 56 x 20 x 21.5mm
  • Working temperature rating: -20C to +50C


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SKU: SEN-079. Category: . Tags: , , .
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