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


Constant toughness even under extreme conditions

Model Wireless Communication
GT20Q-SM(U) -
GT20Q-SM(R) -
Warranty for 5 years
*Registration required

Secure robustness

Drop impact resistance


Highest standard in the class of 2 m × 60 times
GT20 has a highly durable design to withstand strong impact, so there is nothing to worry about if you drop this scanner.

Environmental resistance


P code rating of IP65 achieved
GT20 is recommended with confidence even in the case that it is used under severe conditions, such as at dusty or wet locations.

Operating temperature range


Between -20 and 50°C
GT20 can be used under various types of environment, such as inside cold storage chambers and semi-outdoor areas in plants, expanding the range of use for customers.

Overwhelming reading performance

High-speed reading


Adopting a powerful reading algorithm created exclusively by the manufacturer that developed the QR Code®
Smooth reading that does not cause stress on users contributes to improving work efficiency.

LCD screen reading


The original LED lighting control function enables smooth reading of codes displayed on a liquid crystal screen.
GT20 can read Barcodes displayed on a PC or tablet screen, expanding the range of use for customers.

Poorly printed label reading


Efficient at reading dirty and blurred codes
GT20 has such a high reading performance that it can read even poorly printed codes very efficiently, so there is nothing to worry about even at a site under severe conditions where codes easily become dirty, delivering "What a high reading performance!".



Quick operations with 360° reading
Users can carry out operations without concern as to the direction of barcodes.

Additional features!!

Point Scan Mode


GT20 can read only the targeted code indicated by the central cross even when multiple codes exist in the reading area.

One-time reading of multi-row barcodes


GT20 can read a barcode with up to three rows at a time.

Concatenated QR Code reading


GT20 can read a concatenated QR Code at one time.

Outstanding operability

Confirmation of reading


Double LED, buzzer and vibrator incorporated
GT20 allows secure confirmation by “light,” “sound” and“vibration” even in noisy conditions.

Among the most lightweight designs in its class


Lightweight body weighing 180 g
The lightweight and compact design can reduce fatigue when used for long periods. Its user-friendly body is highly durable yet lightweight.



With an area guide marker
The marker makes it easy for users to identify the reading area, enabling smooth operations.



GT20 has a hook so that it can be hung from the ceiling together with other jigs when used at plant lines, etc.
Considerations only possible by Denso Wave, expanding the range of use for customers.

Code lock


The connector cover, which is resilient against becoming detached and breaking, firmly locks the cord.
The body is not the only durable part. DENSO Wave paid meticulous attention to even the shape of the connector cover and achieved robustness in every detail.

Data entry to smart devices is now easier, quicker and more accurate!

Magic Key


Work can become more efficient by allocating a convenient function to the Magic Key.


  • Data re-transfer mode - Previously sent data is re-transferred every time the Magic Key is pressed.
  • Designated character transfer mode - Predetermined characters are sent every time the Magic Key is pressed.
  • Read code switching mode - Two predetermined read codes are alternated every time the Magic Key is pressed.

Configuration software


Free software applications“Scanner Setting” and “Scanner Setting 2D” are included, allowing easy configuration of the reading condition, data format, etc. according to the object to be read.
These applications providing convenient functions can reduce customers’ work load concerning application development.

Image capture


Image shooting possible
When a non-conforming product is detected on a plant production line, for example, the image of the product can be captured with GT20 on site and sent to its host.

Equipped with data collation and edit functions - Development of a dedicated application is not required

Equipped with a function to compare the registered master data with the read data
This function enables easy establishment of systems for non-conforming product checking and incorrect labeling checking. Furthermore, the simplified programming software application “ADF Script” makes it easy to edit data freely, including data sorting, extraction and conversion.

Type GT20Q-SM(U)(1) GT20Q-SM(R)
Scanner Method Area Sensor
Readable codes 2D Code QR code, Micro QR code, SQRC, iQRcode, Data Matrix (ECC200), PDF417, Micro PDF417, Maxi code, Aztec, GS1 Composite
Barcodes EAN-13/8 (JAN-13/8), UPC-A/E, UPC/EAN(with add-on), Interleaved 2 of 5 (ITF), Standard 2of 5 (STF), CODABAR (NW-7), CODE39, CODE93, CODE128, GS1-128 (EAN-128), GS1 Databar (RSS)
Minimum resolution 2D Code 0.167mm
Barcodes 0.125mm
Marker Area guide marker
PCS value not less than 0.30
Angle ±50°
Skew angle 360°
Image capture BMP, JPEG output, thumbnail view
Scanning confirmation Confirmation LED (Blue, Green, Red), Buzzer (with 3-level volume control and 3-level tone control)
Communication interface Method USB RS-232C
Connector USB connector(A type) Dsub-9S
Cable 2m 2m, 5m
Power Power supply Supply from the connection(2) Directed AC adapter
Environment requirements Protection rating IP65
Drop resistance(3) 2.0 m × 60 times on a concrete floor
Operating temperature -20 to 50℃
Operating humidity 10 to 90% RH (without dews)
Weight (excl. cable) Approx. 180 g
  1. Two methods are supported: a USB keyboard interface and a USB-COM interface. The factory default is a USB keyboard interface for GT20B and a USB-COM interface for GT20Q.
  2. Please check the connection beforehand because this type of connection may not be possible depending on the model of the PC or USB hub.
  3. Result obtained in a test under regular temperature is shown and not meant as a guarantee.

Optional accessories (separately sold)



Hands-free stand



  • Interface cable
  • AC Adapter
  • Operation guide
  • Instruction manual