Wall thickness measurement

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Compact Ultrasonic Gauge

The Delta™ TT-300 is a compact ultrasonic gauge designed for Wall Thickness Measurement measurement on metallic and non-metallic materials such as aluminium, titanium, plastic, ceramics and glass. The adjustable measurement frequency allows the connection of specific probes, for example  the 10 MHz probe with high detection sensitivity.


  • Easy to operate ultrasonic wall thickness measurement gauge
  • Suitable for metals, glass and plastics
  • Selectable range of transducers for different applications
  • Automatic probe zero adjustment
  • Two point calibration possible
  • Selectable sensitivity for optimal adjustment to the characteristics of the material
  • Display resolution selectable
  • 4-digit LCD display with backlight
  • Scan mode for minimum thickness measurement
  • mm/inch selectable
  • RS232-interface
  • Large internal memory for 500 readings divided in up to 5 files
  • Including rubber protector, couplant and durably aluminium carrying case

Technical specifications

Measurement range (steell): 5,0 mm - 300 mm with 2 MHz probe
1,2 mm - 225 mm with 5 MHz probe
0,75 mm - 25 mm with 10 MHz probe
Measurement range for tubes (steel): min. Ø 20 mm,
min. wall thickness 3 mm
Resolution: selectable: low 0.1 mm or high 0.01mm
Tolerance: 0.05 mm for thicknesses up to 9.99 mm
(0.5%+0.01) mm for thicknesses up to 99.99 mm
(1%+0.1) mm for thicknesses up to 300 mm
Measurement units: Selectable: mm or inch
Sound velocity range: 1000 to 9999 m/s
Display: 4-digit LCD with backlight (selectable)
Alarm function: Minimum / Maximum limits exceeding alarm
Data memory: Storage of 500 thickness readings, devided in up to 5 files
Interface: RS232
Surface temperature: Standard -15°C to +60°C, (high temperature probes available)
Dimensions: 152 mm x 74 mm x 35 mm
Weight: 370g (incl. batteries)
Power supply: 2 pcs. 1.5 V, AA batteries
Operating time: With backlight 60 hours, without backlight 150 hours

Scope of delivery

  • Main unit Delta TT-300
  • Probe 5 MHz with cable
  • Batteries AA (2 pcs.)
  • Rubber protector
  • Couplant
  • Instruction manual
  • Manufacturer’s certificate
  • Aluminium carrying case