The UM-4 series Ultrasonic Thickness Gauge with A-Scan snapshot and high resolution 2.4" Color OLED, 320×240 Pixels Display; used for measuring the thickness of metal materials, pipes etc. 

A-scan snapshot allows the user to view and analyse the waveform for correctness of measured result and identify any problem areas such as wear, or corrosion build up etc.

UM-4 also features Echo-Echo mode* for thru paint / coating measurement. In this mode, a paint layer or coating can be ignored and the substrate metal is measured accurately. It can be used for measuring both metal and non-metalic materials including Plastic, Steel, PVC and Glass Plates and Pipes.

It has a large capcity data logger and extensive DataView software** making it suitable for use in industrial fields such as manufacturing and metal processing, etc.

* UM-4D and UM-4DL only

**UM-4DL only


There are 3 models available within the UM-4 series. Please contact us for pricing and more details.

Additional probe transducers are available on request for low frequency or high frequency or hot surfaces. 



  • 0.01mm/0.001 inch Resolution
  • Up to 100,000 Thickness Values can be stored (UM-4DL only)
  • Alarm Mode
  • Minimum Capture
  • Adjustable Gain (low/medium/high) for tuning accuracy on different materials
  • Two-point Calibration
  • Automatic V-Path Correction
  • A-scan waveform snapshot
  • Thru Paint Function



 Measurement Range

Standard Mode: 0.6mm to 508mm (steel)

Thru Coating Mode: 3mm to 20mm

Measurement Mode

P-E (pulse-echo)

E-E (echo-echo) with dual-crystal probes

 Display Units mm or inch
 Sound Velocity Range  500 to 9999 m/s
 Display Resolution 0.01mm / 0.001"

±0.05mm (up to 10mm)

±0.5%H+0.1 mm (>10mm)

 Calibration Mode Zero, 1-point, 2-point
 Memory  100,000 readings (UM-4DL)
 Display Type  2.4" 320×240 OLED


Standard delivery includes: UM-4 series Ultrasonic Thickness Gauge, Transducer (probe), Padded Carry Case, Operating Manual, Factory Calibration Certificate.


SKU um-4

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