GT20 Series

GT20 Black Scanner

These extra tough and durable scanners read barcodes and 2D codes—and welcome heavy-duty use under extreme conditions. They are especially suited for applications for manufacturing and warehousing. They come with a free, five-year warranty when you register your purchase.

Takes Licks, Still Clicks

Impact Resistant

The GT20 model series meets the highest impact standard—tested to withstand 60 drops at 2 meters (6.5 ft).

Dust- and Water-Tested

The GT20 has a P code rating of IP65, so you can use it with confidence in severe environments of dust and moisture.

Good in Hot and Cold Extremes

GT20 works well in temperatures ranging from -20°C to 50°C (-4°F to 122°F). This makes it ideal for scanning in cold storage and in many areas that are not temperature-controlled.

Outstanding Performance

High-Speed Scanning

With Advanced Scan Plus (barcode models) and Area Scan (2D models), you are assured of quick and accurate readings for multiple, continuous scanning.

Reads LCD Screens

GT20 can read barcodes on PC screens and tablets, bringing digital convenience that reduces reliance on paper.

Clears Up Dirty Codes

The GT20 ably reads poorly printed, blurry, and dirty codes—especially useful in locations where dust and humidity can create a “smudge factor.”

Wide Codes Too

Enjoy quick, successful scanning of wide barcodes. 

  • ITF-14 and GS1-128 (EAN-128) codes common on invoices by public utilities and medical providers;
  • Code 39 barcodes for labels. 

Wins Operators’ Love

See, hear, feel confirmation.

Even in noisy environments, you’ll know a scan has been successful with a double-LED signal, a buzzer, and a vibration.

Compact and lightweight (180 grams/6.3 ounces)

Although super tough and durable, the GT20 is among the lightest in its class. The ergonomic design makes it a pleasure to use, even for extended periods.

Hang In There

GT20 has a hook so it can be hung overhead for ease of accessibility on lines and in areas where multiple tools are used.

“Lock and Code”

The connector cover is resilient to prevent breaking and firmly locks the cord to the scanner body for long-lasting resistance to wear and tear.

Smart Choice for Smart Devices

Working Magic

Assign the function you need to these Magic Key modes:

  • Re-transfer of previously sent data
  • Transfer designated characters
  • Alternate between two predetermined codes (GT20Q models)

Snappy Setup

Using the free Scanner Setting software on your PC you can easily configure settings such as reading condition and data format according to targeted objects.

Image Capture

When the operator detects a non-conforming object, such as a product on a production line, the GT20 can capture an image and send it to the host for verification.


GT20 Dimensions


Model NumberGT20B-SM(R)GT20B-SM(U) (1)GT20Q-SM(R)GT20Q-SM(U) (1)
1D Barcode Models2D Code Models


MethodAdvanced Scan Plus (CCD)Area Sensor
Readable 2D CodesQR code, Micro QR code, SQRC, iQRcode, Data Matrix (ECC200), PDF417, Micro PDF417, Maxi code, Aztec, GS1 Composite
Readable BarcodesEAN-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)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 Codes0.167mm
Minimum Resolution Barcodes0.125mm0.125mm
MarkerArea Guide Marker
PCS valueNot less than 0.30Not less than 0.30
Skew Angele360°
Image CaptureBMP, JPEG output, thumbnail view
Scanning ConfirmationLED (blue, green and red) and tone (with three-step volume and tone control)LED (blue, green and red) and tone (with three-step volume and tone control)

Communication Interface

ConnectorRS-232C (DB9)USB A-typeRS-232C (DB9)USB A-type
Cable2m, 5m2m2m, 5m2m


Power SupplyDirected AC adapterSupply from the connection (2)Directed AC adapterSupply from the connection (2)

Operating Environment

IP RatingIP65 (dust and mist-proof)
Operating Temperature-20 to 50°C-20 to 50°C
Humidity10 to 90% RH (non-condensing)10 to 90% RH (non-condensing)
Drop Test (2)2.0m x 60 times on a concrete floor2.0m x 60 times on a concrete floor

Physical Charateristics

Weight (excluding cable)Approx. 180gApprox. 180g

(1) Two methods are supported: a USB keyboard interface and a USB-COM interface. The factory default is a USB keyboard.
(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) When a code is read every 5 seconds.
(4) Result obtained in a test under regular temperature is shown and not meant as a guarantee.

**All specifications subject to change without notice.

Optional Accessories – Sold Separately


Part #
CableStraight 5m RS-232C cable. Power from AC adapter (not included).CBG2-RS5000/9-1
CableStraight 2m RS-232C cable power from AC adapter (not included).CBG2-RS2000/9-1
CableStraight 2m USB cableCBG2-US2000/4-1

Power and Charging

AC AdapterOutput: DC 5V - 1.5A Input: 100 to 240 V AC ±10%. For Brazil only.AD2-3005/3000
AC AdapterOutput: DC 5V - 1.5A Input: 100 to 240 V AC ±10%. For USA, Canada and Mexico.AD2-2005/300003

Other Accessories

Desktop/Wall Mount HolderS-GT21
Handsfree StandOil ResistantH-GT21
Handsfree StandH-GT20
Handsfree StandH-GT10
Handsfree StandH-GT11
Neck StrapNS-BHT1300
Suspension HolderT-GT10

Related Software


Part #
Active USB-COM Port DriverUSB-COM port driverFree download
QR-kbifKeyboard interface software converts scanner input into keyboard dataFree download
Scanner SettingSetting software for 1D scanner seriesFree download
Scanner Setting 2DSetting software for 2D scanner seriesFree download

All software can be downloaded from DENSO Wave’s QBdirect. Free software and drivers can be used immediately. Other software packages are available as trials. Please contact DENSO ADC to purchase a full license.



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