The UM-4 series advanced 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. 

UM-4 provides users with advanced functionality including A-scan snapshot which allows the user to view and analyse the waveform for correctness of measured result and identify any problem areas such as flaws, wear, or corrosion build up etc.

UM-4D/DL 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.

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

* 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.



  • 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, User Operating Manual, Factory Calibration Certificate.


SKU um-4
Shipping Weight 1.5000kg
Shipping Width 0.300m
Shipping Height 0.150m
Shipping Length 0.240m
Shipping Cubic 0.010800000m3

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