Wall thickness measurement

Request a quote

Universal wall thickness gauge with external probe

The Delta TT-100 is an universal gauge for metallic and non-metallic materials, e. g. steel, aluminium, grey cast iron, glass, ceramic, plastics or glass. The measuring procedure requires two adjacent parallel surfaces.

The gauge is chracterized by high accuracy and with an easy-to-use menue structure. Five different sound velocities can be stored in order to facilitate the measuring of different materials. The device can alos be used for determining the sound velocity.

The measurement process is simple: after adjusting the sound velocity and applying coupling gel the probe will be placed on the measuring spot. A symbol in the display signals a successful pairing  and the wall thickness can be read. For the storage of the readings 10 spaces are available.

For measurements on hot steel surfaces the Delta TT-120 can be used. A special high-temperature probe allows measurements up to 300 °C. A high-temperature coupling gel is required.

If higher accuracy is needed, we recommend the Delta TT-130, with a resolution of 0.01 mm (TT-100: 0.1 mm).


Product No.  
10006 Standard wall thickness gauge
Delta TT-100
10395 Hig-temperature wall thickness gauge
Delta TT-120
10047 Wall thickness gauge
Delta TT-130 with higher resolution

Advantages at a glance

  • Easy to operate ultrasonic wall thickness measurement gauge
  • Suitable for metals, glass and Plastics (TT-120: only steel)
  • Standard 5 MHz probe included
  • Sound velocity up to 9999 m/s (TT-100, TT-130)
  • 4-digit LCD display with backlight
  • Resolution 0.1 mm (TT-130: 0.01 mm)
  • Internal Memory up to 10 readings
  • 5 selectable sound velocities can be stored (TT-100, TT-130)

Technical specifications

Measurement range(steel): 1,0 mm - 225,0 mm
(with 5 MHz probe)
Measurement ange for tubes (steel): min. Ø 20 mm,
min. wall thickness 3 mm
Probe standard : 5 MHz, Ø 12,5 mm
Resolution: 0,1 mm (TT-100, TT-120)
0,01 mm (TT-130)
Zeroing: manually on integrated 4 mm steel block
Measurement uncertainty: ± (0,1 mm + 1 % of reading) TT-100, TT-120
± (0,02 mm + 1 % of reading ) TT-130
Measurement unit: mm
Sound velocity range: 1000 bis 9999 m/s
Display: 4-digit LCD
Data Memory: Storage of 10 readings
Surface temperature: -10 °C to +60 °C
-10 °C to +300 °C (TT-120)
Dimensions: 126 mm x 68 mm x 23 mm
Weight: ca. 250g (incl. batteries)
Power supply: 2x 1,5 V (AA) batteries
Operating time: ca. 250 hours

Scope of delivery

  • Gauge Delta TT-100 Serie
  • Probe Typ 5 MHz with cable
  • Integrated 4 mm steel block for testing
  • Batteries 2 x 1,5 V AA
  • Coupling gel 60 ml
  • Instruction manual
  • Manufacturer’s certificate
  • Carrying case