• SDK available for development
  • Quick recognition of dry, wet and rough fingerprints
  • High Speed USB 2.0

SLK20R is a leading fingerprint scanner designed by ZKTeco USA laboratory which adopts the advanced optical design. It has a superior ability to do live fingerprint detection and capture high-quality fingerprint images by 2 Megapixel camera. It can be the most comfortable and affordable desktop enrollment and identification device.
  • Stable operation under strong light 
  • Support live fingerprint detection function
  • Large fingerprint capture area and high image performance
  • Quick recognition of dry, wet and rough fingerprints
  • High Speed USB 2.0
  • Low Power Idle Mode
  • Vailable SDK for development
Model NameSLK20R
Flash32 MB
SoCRTOS[image out only]
Image Quality2 million pixels CMOS
Encrypted Fingerprint DataYES
Sunlight OperationYes, Dark field and Automatic Gain / Exposure
Water SplashYES
Dry, Wet, or Rough FingerprintsWork well
Power Consumption5V:200mA Scanning;5V:60mA idle (waiting for finger)
Live Fingerprint DetectionYES
Product CertificationsFCC, CE, RoHS, PIV
Power Voltage5V (USB)
Power Current200mA
CommunicationUSB 2.0 / USB1.1
Interface SocketUSB Type A
Image Resolution500~1000 dpi
Effective Collecting Area15.24 * 20.32 mm (FAP20)
Collecting Area16.5 * 23 mm
Image Size300 * 400 pixel (FAP20 )
Dimension49 * 44 * 20.1mm (L*W*H)
Image FormatRAW, BMP, JPG
TemplateZKFinger V10.0 ; ISO19794-2 ; ANSI-378
Template Size1- 4KB (ZKFinger V10.0);1568 B (ISO 19794-2)
Gray Level256
Operating Environment-20 °C ~ +50 °C; 90% r.h.


Download Date Files
ZKBioOnline USB fingerprint sensor driver for use on web platforms 14/10/2021
USB fingerprint driver for Atlas Series (SLK20R) 03/06/2021

Quick Start Guide

Case Study

Download Date Files
Case Study Access Control and Entrance Control Management in Ferrovial Management Building in Madrid Spain 13/02/2019

Data Sheet

Download Date Files
ZKTeco Fingerprint Scanners Hardware Selection Guide-v3.1 05/10/2018
ZKTeco Fingerprint Scanner SDK Selection Guide-Ver3.0 05/10/2018
SLK 20R Data Sheet 05/10/2018
slk20r_data_sheet.pdf700.5 KB