Zebra GK420t Desktop Printer

These sleek and compact desktop label printers fit just about any space, budget, or application. Streamline your processes today with these thermal label printers.

  • Details

  • Specifications At A Glance

Choose the space-saving direct thermal version of either model for the smallest footprint of any 4-inch desktop printer, or the direct thermal/thermal transfer version to save users time with the easiest ribbon-loading system available.

With both EPL™and ZPL® programming languages native on all models, G-Series printers fit in perfectly with other Zebra printers. And a variety of connectivity options makes them easy to integrate into existing local or networked systems. Zebra’s G-Series printers are a smart investment, and always a perfect fit.

Always a Perfect Fit

Zebra’s G-Series compact desktop printers for print widths up to 4 inches deliver best-in-class speed and performance. From the basic GK™model to the feature-rich GX™model, the G-Series printers are reliable, durable, and flexible to fit almost any low- to mid-volume printing application and budget.

Fitting Choices

Built with Zebra durability and reliability, the G-Series GK model provides the best value of all basic desktop thermal printers, while the premier GX model supports a variety of industries and applications with the widest range of features.

Ideal for These Applications

  • Retail / Price marking, Gift registry, coupon and receipt printing, Pharmacy prescription labeling
  • Healthcare / Specimen labeling, Patient tracking
  • Manufacturing / Light-industrial work-in-process and product labeling
  • Security / Visitor ID, Evidence tracking, Parking passes
  • Travel & Hospitality / Boarding passes, Bag tags, Ski lift tickets

Standard Features
  • Print methods: Thermal transfer or direct thermal
  • Programming language: EPL and ZPL are standard construction: Dual-wall frame
  • Tool-less printhead and platen replacement
  • OpenACCESS™ for easy media loading
  • Quick and easy ribbon loading
  • Auto-calibration of media
  • Triple connectivity: USB, parallel, serial
Printer Specifications
203 dpi/8 dots per mm
Standard: 4 MB Flash; 8 MB SDRAM
Print Width
4.09”/104 mm
Maximum Print Length
39.0”/990 mm
Maximum Print Speed
5”/127 mm per second
Media Sensors
Standard: Fixed reflective and transmissive sensors
Media Characteristics
Maximum Label and Liner Length
Maximum non-continuous: 39”/990 mm
Maximum Label and Liner Width
0.75”/19 mm to 4.25”/108 mm
Maximum Media Roll Size
5”/127 mm O.D.
Media Thickness
0.003”/0.08 mm to 0.0075”/0.19 mm
Media Types

Roll-fed or fan-fed, die-cut or continuous direct thermal labels with or without black line, tag stock, continuous receipt paper, wristbands

Ribbon Characteristics
  • Outside diameter: 1.36”/35 mm
  • Standard length: 244’/74 m• Ratio: 1:1 media to roll to ribbon
  • Width: 1.33”/33.8 mm to 43”/109.2 mm
  • Core inner diameter: 0.5”/12.7 mm
Operating Characteristics
  • Operating temperature: 40° F/4.4° C to 105° F/41° C
  • Storage temperature: -40° F/-40° C to 140° F/60° C
  • Operating humidity: 5% to 95% non-condensing
  • Storage humidity: 5% to 95% non-condensingElectricalAuto

Auto-detectable (PFC Compliant) 100-240VAV, 50-60HzAgency

Agency Approvals
  • Emissions: FCC Part 15, Subpart B, VCCI, C-Tick
  • Emissions and Susceptibility: (CE): EN55022 Class-B, EN61000-3-2, EN61000-3-0 and EN55024, CCC
  • Safety: CB Scheme IEC IEC 60950:1991 +A1 +A2 +A3 +A3 +A4, TUV NRTL, IRAM NOM, AAMI, CCC

Direct Thermal

Width: 6.75”/171 mm

Height: 6.0”/152 mm

Depth: 8.25”/210 mm

Weight: 3 lbs/1.4 kg

Thermal Transfer

Width: 7.6”/193 mm

Height: 7.5”/191 mm

Depth: 10.0”/254 mm

Weight: 4.6 lbs/2.1 kg

ZebraLink™ Solutions

  • ZebraDesigner™ Pro
  • ZebraDesigner
  • ZebraNet™ Bridge Enterprise
  • ZebraNet Utilities v7.0
  • Zebra Universal Driver
  • ZebraDesigner Driver
  • ZBI-Developer™
  • POS Driver
Networking and Connectivity
  • Ethernet—10/100 internal (optional) offered in combination with USB and serial interface (replaces parallel port)
  • Wireless—802.11 b/g or Bluetooth® (optional) with LCD display offered in combination with USB and serial interfaces (replaces parallel port)—GX™ models only
  • EPL2™
  • EPL™ Line Mode (direct thermal only)
  • ZPL II®
  • Web View
  • Alert
  • ZBI™
Communication and Interface Capabilities
  • G-Series models triple interface standard
  • RS-232 auto-sensing serial interface, DB-9
  • USB V1.1, bi-directional
  • Centronics® parallel
  • Ethernet—10/100 internal (optional) offered in combination with USB and serial interface (replaces parallel port)
Fonts and Character Sets
  • 16 resident expandable ZPL II bitmap fonts
  • One resident scaleable ZPL font
  • Five resident expandable EPL2 fonts
  • Native open type font support
  • Unicode™ compliant for multi-language, on-demand thermal printing
Graphic Features
  • Supports user-defined fonts and graphics—including custom logos
  • ZPL II drawing commands—for boxes and lines
 Barcode Symbologies
  • Barcode Ratios: 2:1 (non-rotated) and 3:1
  • Linear Barcodes: Codabar, Code 11 (ZPL), Code 128, Code 39, Code 93, Code 93, EAN-13, EAN-8, EAN-14 (ZPL), German Post Code (EPL), Industrial 2-of-5 (ZPL), Interleaved 2-of-5, Japanese Postnet (EPL), ISBT-128 (ZPL), Logmars (ZPL), MSI, Plessey, Postnet, GS1 DataBar (RSS-14), Standard 2-of-5 (ZPL), UCC/EAN-128 (EPL), UPC and EAN 2 or 5 digit extensions (ZPL), UPC-A, UPC-A and UPC-E with EAN 2 or 5 digit extensions, UPC-E, and GS1 Databar (formerly RSS)
  • 2-Dimensional: Codablock (ZPL), Code 49 (ZPL), Data Matrix, MaxiCode, QR Code, PDF417, MicroPDF417, Aztec (For EPL and ZPL except where noted)
Options and Accessories
  • Dispenser—label peel and present with label present sensor
  • ZebraNet® 10/100 Print Server—Internal Ethernet for network communication and printing
  • Bluetooth wireless, includes LCD for visual communication—GX models only
  • 802.11b/g wireless radio, includes LCD for visual communication—GX models only
  • Adjustable media sensor for black line media— GX models only
  • Cutter for various media types—GX models only
  • 300 dpi print resolution printing for fine detail and crisp images (GX430t™)
  • 64 MB Flash memory with real-time clock (for total of 68 MB)—GX models only
  • Font Packs—Asian and other international font kits
  • KDU Plus™ and KDU™ keyboard display units for stand-alone printing solutions
  • Interface cables and adapters


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