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A world leader in automatic data capture technology and the inventor of the QR code®

  AT31Q New!

Touch scanning of both linear and 2D codes

Touch scanning while checking codes enables every user to work accurately and quickly.

Model Wireless Communication
AT31Q-SM(U) -
AT31Q-SM(R) -

Each region has different availability of sales product.

Warranty for 5 years
*USB model, RS-232C model only.

User-friendly operation

1-D and 2-D touch scanning while viewing codes

The AT31Q supports not only distant scanning but also touch scanning, which enables users to scan codes more accurately. The innovative design allows users to see the codes as they scan them.

Operator friendly

The light, compact body weighs just 125 g, reducing operator fatigue. A loud buzzer and highly visible alert light ensure that readings are confirmed.

Ergonomic design

The AT31Q is designed so the user can quickly pick the scanner up from its resting position. The ergonomically shaped grip fits comfortably in the user’s hand, reducing strain during long work periods. The trigger is designed so the user’s finger naturally rests on it. A click detent lets the user know by feel that the trigger has been pulled.

Outstanding scanning performance

Allows expanded services using mobile coupons and mobile membership cards

The AT31Q can scan codes displayed on mobile phones and smartphones. It can be used for normal POS check- out operations as well as reading mobile coupons and mobile membership cards, enabling a wide range of applications.

Low risk illumination source


The AT31Q light source is low wavelength, so reducing potentially dangerous glare if directed towards someone eyes. The soft illumination light ensures a people-friendly work environment.

Highly capable for reading poorly printed labels

The high-performance scan engine of the AT31Q can read even dirty, damaged and poorly printed codes.


Reading mode can be selected according to the operation

Point Scan Mode

Reads only the targeted code in the center even when multiple codes exist in the reading area.

One-time reading of multirow barcodes

Reads barcodes with up to three rows in a single scan.

Concatenated QR Code® reading

Reads concatenated QR Codes in a single scan.

Long-term durability provides peace of mind

Best-in-class durability

The AT31Q is designed to withstand a 2-meter drop impact and other multiple impacts during daily operations. It resists 100,000 falls from a height of 7.9 in (20 cm), giving operators long-term peace of mind. An IP42 rating provides protection against water and dust.

Attention to rugged-design details

The point of connection is often prone to failure. By providing a highly robust and durable connector cover, DENSO ensures that this risk is minimized.

Easy configurability ensures easy deployment

Parameters can be easily set on a PC

The AT31Q comes with the free software application Scanner Setting 2D, enabling users to easily set parameters such as reading conditions and data formats based on the objects to be read. Several convenient functions reduce the time required to develop applications.

Data-collation and edit functions eliminate the need for development of a dedicated application

The AT31Q is equipped with a function to compare the registered master data with the read data, which enables easy creation of systems for taking inventory, etc. In addition, the AT31Q’s ADF Script application makes it easy to edit data freely, including data sorting, extraction and conversion, without having to develop a dedicated application.


USB Model


RS-232C Model


Scanner Method Area Sensor
Readable codes 2D Codes QR code, SQRC, iQRcode, Micro QR code, Data Matrix (ECC200), PDF417, Micro PDF417, Maxi code, Aztec, GS1 Composite
1D Codes EAN-13/8 (JAN-13/8), UPC-A/E, UPC/EAN (with add-on), Interleaved 2 of 5 (ITF), Standard 2 of 5 (STF), CODABAR (NW-7), CODE39, CODE93, CODE128, GS1-128 (EAN-128), GS1 Databar (RSS)
Minimum resolution 2D Codes 0.167mm
1D Codes 0.125mm
PCS value 0.30 min
Angle ±50°
Skew angle 360°
Image capture BMP, JPEG output, thumbnail view
Scanning confirmation Confirmation LED (blue, green, red), Buzzer
Marker LED point marker
Communication interface Method USB(1) RS-232C
Connector USB connector (A type) D-sub 9S
Cable 2 m 2 m, 5 m
Power Supply from the connection(2) Supply from the connection, directed AC adapter
Environment requirements Protection rating IP42
Drop resistance(3) 0.2 m x 100,000 times; 2.0 m onto concrete floor
Operating temperature -5 to 50°C
Operating humidity 10 to 90% RH (no condensation)
Weight (Except cable) Approx. 125 g

  1. Two methods are supported: a USB keyboard interface and a USB-COM interface. Factory default is USB-COM.
  2. This type of connection may not be possible depending on the model of the PC or USB hub.
  3. Result obtained in test at room temperature; not meant as a guarantee.

Optional accessories (separately sold)




  • Interface cable
  • AC adaptor (Only for the RS-232C model using an AC power adapter)
  • Operation Guide
  • Instruction manual (Download from QBdirect)

Software (sold separately)

Setting software

Scanner Setting 2D (Free)
Software for various parameter settings of AT31Q

Keyboard emulation software

QR_kbif (Free)
Software which converts the data from a scanner like input from a keyboard.

Software which receives the information read by a scanner and converts the data as if it was input from a keyboard

USB driver

Active USB-COM port driver (Free)

SQRC® Setting software

SQRC® Setting
Software which set cryptography key necessary for SQRC reading