A compact, flexible and highly reliable 3-inch (up to 80mm) open frame kiosk printing mechanism. Designed for standalone self-service kiosk installations, the BK3-31 direct thermal printer operates at print speeds up to 250mm per second with 203dpi resolution to produce high quality text, graphics and barcodes. Presenting a larger paper roll capacity than traditional packaged kiosk printers, the BK3-31 support media roll diameters of 80 / 102 / 120mm and various media widths of 83 / 80 / 60 / 58 / 20mm for a range of printing applications from wider lottery ticketing to narrow token printing. The kiosk printer also provides a paper saving mode through BIXOLON’s simple Unified Utility reducing paper wastage resulting in paper savings up to 25% and decreased CO2 emissions.


With compact, lightweight design the BK3-31 kiosk printer supports a range of kiosk mounting options to provide design flexibility for the kiosk builder. With seamless paper feeding with additional roller-tension, multi-position near end sensor for easy monitoring of the paper, removable bezels and an adjustable media width frame the printing mechanism can be personalised for a range of kiosk designs. The kiosk printing mechanism also has a USB V2.0 and Serial (9 pin male or 5 pin connector) with a DC Jack or 2 pin power connector connectivity as standard.

Supported by BIXOLON’s wide range of drivers, utilities and SDKs, the BK3-31 is compatible with Windows® major OS system and OPOS-based systems from Android™, Windows® and Linux™ for smart based devices. Supporting by an industry leading 2 year warranty as standard.


  • 3-inch (up to 80mm) direct thermal open frame kiosk printer mechanism
  • Fast print speed up to 250mm per second at 203dpi high quality print resolution to produce text, graphics and barcodes
  • Supporting selectable media widths: 83/80/60/58/20mm
  • Resistance to harsh environments to provide long term reliable operation
  • Accompanied by a comprehensive range of drivers and SDKs (Software Development Kits)
  • Reducing paper usage up to 25% resulting in economic and environmental sustainability plus a reduction in CO2 emissions
  • Large paper roll capacity: Media roll diameter of 80/102/120mm
  • Compact and lightweight allowing a range of kiosk mounting options
  • Power switch and reset button available on both sides of the printer making it easy to reboot
  • Smooth and seamless paper feeding with additional roller-tension
  • Diverse interface offering a variety of ways to connect: USB (v2.0 Full Speed) + Serial (9P-Male, 2P-Connector type)
  • Removable bezels to be tailored for different designs of kiosks
  • Near end sensor for efficiency
  • Near end sensor for efficiently monitoring status of paper and media width frame which is adjustable by hand
  • 2 year warranty as standard


Print MethodDirect Thermal
Print SpeedUp to 250mm/s
Print Resolution203dpi
Print Width72 / 54 / 48 / 12 mm
SensorPaper End, Cover Open, Near End, Black Mark
Media TypeReceipt
Media Width83 / 80 / 60 / 58 / 20 mm
Media Roll DiameterUp to 120 mm
Media Thickness0.05 ~ 0.12 mm
Supply MethodEasy Paper Loading, Side Open
Dimensions (WxLxD)Media Roll Diameter Ø80: 130 x 130 x 91 Media Roll Diameter Ø102: 130 x 147 x 99 Media Roll Diameter Ø120: 130 x 143 x 105
Weight700 g
PowerExternal Power Supply Housed Internally (Adaptor 24V/2.5A) USB A-B Cable 1.8m, Power Cord
NV Image Memory256 Kbytes (Mono)
Receive Buffer64 Kbytes
User Define Buffer12 Kbytes
InterfaceUSB(V2.0 Full Speed) + Serial(9P-Male, Connector type)
TemperatureOperating: 0 ~ 40℃ (32 ~ 104℉) Storage: -20 ~ 60℃ (-4 ~ 140℉)
HumidityOperating: 10 ~ 80% RH Storage 10 ~ 90% RH
Thermal Print Head (TPH)100 km
Auto Cutter1.5 Million Cuts
EmulationBXL / POS
Driver / UtilityWindows Driver, OPOS Driver, Linux / Mac CUPS Driver, Utility Program
SDK/PluginAndroid SDK, Windows SDK, Linux SDK
Character SizeFont A: 12 x 24 Font B: 9 x 17 Font C: 9 x 24 KOR, CHN, JPN: 24 x 24
Characters Per Line (Paper Width)96(20) / 384(58) / 432(60) / 576(80,83) dots
Character SetsAlphanumeric: 95 Extended Graphics: 128 x 35 page International: 32
GraphicsSupporting user-defined fonts, graphics, formats and logos
Barcode Symbologies1D: Coda Bar, Code 39, Code 93, Code 128, EAN-8, EAN-13, ITF, UPC-A, UPC-E 2D: Data Matrix, GS1-128, GS1 DataBar Stacked / Omnidirectional / Truncated / Limited / Expanded, PDF417, QR code
Accessories OptionalSMPS(DC Jack), SMPS(2P Connector), Male to Male type Serial Cable, 5P to Male type Serial Cable