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GE DM4 Thickness Gauge GE Inspection Technologies Get Quote



The DM4 and DM4DL are smart, simple-to-use ultrasonic thickness gauges that offering accurate ultrasonic thickness measurement in a small lightweight package.

Compact and ergonomic, the DM4 and DM4 DL provides comfortable one hand use. Operator fatigue is virtually eliminated since the instruments weigh only 9 oz. (255g) and all keys are easily accessed with the thumb.

Key Features

  • 200 hrs. on 2 AA Alkaline Batteries- no special battery packs or chargers.
  • On-Board 5,000 reading data logger (DM4DL)
  • MIN Mode captures thinnest reading
  • Stable High Temp. Readings
  • 9 key operation (DM4DL)
  • 5 key operation (DM4)
  • DUAL MULTI mode for measuring Through-Coatings (paint)?.
  • Lightweight; only 9 oz. with batteries

Technical Specifications

Operating Principle Ultrasonic pulse/echo
Probe Zero Adjustment Automatic, or manual 2 pt. calibration
V-path correction Automatic, micro-processor controlled
Measuring Range .025\" - 20.00\" (.64 - 500 mm) depending on probe, material, surface condition, and temperature
Dual Multi Measuring Range .080\" - .800\" (2-20mm) depending on the probe, surface condition, type and thickness of the coating, the thickness of the metal and the qual
Displayed Resolution .001 or .01 up to 9.999 inches, .01 above 9.999 inches; (.01 or .1 up to 99.99mm, .1 above 99.99 mm)
Measurement Update Rate 4 Hz; 25 Hz in minimum capture mode
Gain Automatic, or Manual (Hi, Med., Lo)
Material Velocity Range 39,000 to 393,700 in./sec.; (1000 to 9999 m/sec)
Receiver Bandwidth 1 MHz to 10 MHz (-3 dB)
Display Type 4 digit LCD, .5\" (12.7 mm) high, direct drive, with electroluminescent backlight
Power Supply 2 ea. 1.5V AA alkaline cells
Battery Life (operating time) Up to 200 hours @ 25% duty cycle without backlight
Auto Shut Off After 3 minutes of non-use
Operating Temperature Range +10/°F to +120/°F (-10/°C to +50/°C)
Hazardous Area Operation Safe operation as defined by MIL-STD-810E, Method 511.3, Procedure I.


  US Metric
Dimensions (L x W x D) 5.8 x 3.0\" x 1.4\"\" 146 x 76.2 x 34.3 mm


  US Metric
Weight 5.7 lbs 2.6 kg