Extech Digital Thickness Gauges

The Extech thickness gauges are designed in a compact and rugged housing ideal for field use.


  • Multiple transducer options for high temperature and difficult to measure materials
  • Fast minimum feature to capture minimum thicknesses
  • Sunlight readable dot-matrix display with backlight
Starting At $1,609.00
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The Extech TKG series of ultrasonic, portable thickness gauges are specifically designed to measure the remaining wall thickness of primarily steel structures. The TKG100 is a base gauge offering a simple user interface in the custom molded high-density plastic case with rubber keypad. It offers reliable, accurate thickness readings. The TKG150 contains all of the same features as the TKG100, along wih a 50,000 reading datalogger capacity with complete setup tracking, an echo to echo option to reduce coating errors, and a vibrate on alarm function. The TKG250 includes all of the features of the two previous models, in addition to a color LCD display that shows red, yellow, and green visual alarm indications. It also offers a gain adjustement and automated transducer replacement notification feature.


The TKG250 includes all of the features of the two previous models, in addition to a color LCD display that shows red, yellow, and green visual alarm indications. It also offers a gain adjustement and automated transducer replacement notification feature.The B-scan function displays a visual cross section of inspection area with no correlation to distance. TKG250's file compare feature can serve as a real-time corrosion monitor.When powering on, the gauge does an automatic zeroing of the transducer, thus eliminating the need for an on-block zero. This feature ensures the transducer is working in accordance with electronic zeroing procedures, particularly important on high temperature materials.


These pressure gauges are ideal for measurements in boiler tubes, pressure vessels, storage tanks, ship hulls, containers, home oil tanks, pipes, steam lines, compressors, shafts, bridge pins, and bond inspections.

  • Thickness Range (In Steel): 5MHz probe: 0.040 to 20" (1.0 to 508mm); 10MHz probe: 0.020 to 20" (0.50 to 508mm)
  • Material Velocity Calibration Range: 0.200 to 0.7362 in/μS (0.508 to 18.699mm/μS)

  • (1) Pressure gauge
  • (1) 2oz bottle of couplant
  • (2) AA batteries
  • (1) Transducer with potted cable
  • (1) Hard carrying case
  • (1) Protective holster (TKG150 and TKG250 only)
  • (1) USB cable (TKG150 and TKG250 only)
  • (1) Extech XPorter software (TKG150 and TKG250 only)
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Extech Digital Thickness Gauges
Digital ultrasonic thickness gauge
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Digital ultrasonic thickness gauge/datalogger with color waveform
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