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Stationary scanner capable of reading QR codes from the LCD screen of a mobile phone

  • Feature
  • Specifications
  • Software


High-speed reading of Mobile QR Codes

Ability to read QR codes displayed on the LCD screens of mobile phones at high speed.

Includes LEDs/speaker to confirm read operation (QK20 only)

Includes LEDs arranged at the corners and a high-volume speaker to confirm read operation.This notifies the user that the code has been read.

Type Stationary type Built-in type
Model (RS-232C model) (USB model) (RS-232C model) (USB model)
Model name QK20-R QK20-U QK21-R QK21-U
Scanner Readablecode LCDscreen 2Dcode QR code, micro QR code, SQRC, Aztec
Barcode EAN-13/8, UPC-A/E
Paper 2Dcode QR code, micro QR code, SQRC, iQR, PDF417, micro PDF, DataMatrix, Aztec, GS1 Composite, MaxiCode
Barcode EAN-13/8, UPC-A/E, Interleaved 2 of 5 (ITF), CODABAR (NW-7), CODE39, CODE128, GS1-128 (EAN-128), RSS(GS1 DataBar), UPC/EAN with add-on, CODE93
Min. resolution 2D code 0.25mm
Barcode 0.18mm (0.26mm for EAN, UPC)
Scanningarea Mobile LCD code
(with backlight on)
Paper code 38mm×70mm
Focusing point 7mm(1)
Scanning confirmation Blue/red/green LEDs / speaker -
Communicationinterface System RS-232C USB 1.1-compliant (2)
(virtual COM, HID)
RS-232C USB 1.1-compliant (2)
(virtual COM, HID)
Connector D-sub 9 pin (female) USB type A D-sub 9 pin (female) USB type A
Cable length 1.5m 1.5m 1m 1.5m
Power source Power supply AC adaptor Supply from host device (3) Supply from host device (3) Supply from host device (3)
Environmental performance IP rating IPX2
Operating temperature -5~50°C
Operating humidity 10-90% RH (non-condensing/non-freezing)
Weight (excl. cable) 335g 340g 300g 305g
  1. 1. Height from dust-proof plate
  2. 2. Two systems are supported: USB keyboard interface and USB-COM interface.When using in USB-COM interface mode, please download the USB driver from the DENSO WAVE website (free of charge).Supported operating systems are Windows Vista (32bit) / 7(32bit/64bit)/8(32bit/64bit) /8.1(32bit/64bit) /10(32bit/64bit).
  3. 3. Please check the connection beforehand because this type of connection may not be possible depending on the model of the PC or USB hub.

External dimensions


Scanner configuration software

Software for configuring various parameters of the DENSO WAVE Handy Scanners

Type Model Feature
Scanner configuration software Scanner Setting 2D(Free) Software for configuring various parameters of the QK20 from a PC

Keyboard interface software

Software for converting data from a scanner into the same format as data from a keyboard

Type Model Feature
Keyboard interface software QRkbif(Free) Software for receiving data read by a scanner and converting it to the same format as data input from a keyboard


SQRC configuration software

Type Model Feature
SQRC configuration software SQRC Setting Software for generating SQRC encryption keys and configuring model registration from a PC
  • Feature
  • Specifications
  • Software

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