ATG400 Ultrasonic Through Coating Thickness Gauge


  • Pulse~echo mode(standard mode for ordinary thickness measurement)
  • Echo~echo mode (coating mode for net thickness measurement without removal of thin coatings)
  • Multiple Echo mode (measure the thickness of a painted structure without having to remove thick coatings)
  • Built-in probe compensating lines

Delivery normally 10 – 14 days from receipt of order / payment


The ATG400 ultrasonic through coating thickness gauge can be used in three modes; pulse -echo mode for normal thickness gauging without coatings; echo – echo mode for measuring through thin paint layers and multiple echo for measuring through thicker coatings, measuring only the metal thickness.

ATG400 Through Coating Thickness Gauge Specification:

  • Operating principle: Ultrasonic pulse/echo method with dual-element probes
  • Measuring Range: 0.8~300mm (standard mode) / 3~18mm (coating mode) (Dependent on the probe, materials and surface conditions)
  • Unit and Resolution: mm: 0.01 or 0.1 / inch: 0.001 or 0.01
  • Material’s Velocity Range: 1000~9999 m/s ; 0.0394~0.3937in/us ±0.05mm (≤10mm)
  • Linearity Error: ±0.5% H + 0.01 (≥10mm) (H-the height of the analyte)
  • Display Screen: 128 x 64 dot-matrix LCD (42 x 57mm) With backlight
  • Probe zero adjustment (Selectable): 1-point calibration: normal measurement –  2-point calibration: curve surface measurement or other special application with a high precision
  • Data Storage: It can store 500 thickness values divided into 5 arrays
  • Minimum value checking: Move the probe along the surface of the testing material and the ATG400 gauge is able to automatically find the thinnest point.
  • Warning function: If the measured value exceeds the pre-set thickness limit, the warning tone will sound.
  • V-Path Modification: Auto V beam path modification to compensate for the nonlinearity of twin crytsal probes.
  • Repeatability: ±0.05mm
  • Auto shut-off: Will shut off automatically after 5 min. of non-use
  • Working Temperature: -10℃ to +50℃
  • Size: 149 × 73mm × 32mm (H × W × D)
  • Weight: 200g (including batteries)
  • Power: 2 x 1.5V AA alkaline batteries – Warning with low battery voltage
  • Measurement update rate: 4 Hz in standard measurement mode –  25 Hz in MIN capture mode
  • Operating time: Up to 200 hours (without backlight) with alkaline batteries, depending on operating mode

Standard Package

  • ATG400 Through Coating Thickness Gauge
  • Standard Probe
  • Carrying Case
  • 2 x 1.5V AA alkaline batteries
  • Couplant
  • Operating manual
  • Certification of quality
  • Packaging list

Optional Extras:

  • Attachable rubber case
  • Numerous special probes on request
  • Couplants and high-temperature couplant
  • 4-step / 6-step block for calibration
  • Data transmission cable
  • Application software

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