Touchstone™ 1 Ultrasonic Thickness Gauge
WHAT IS TOUCHSTONE™ 1 ULTRASONIC THICKNESS GAUGE?
The TOUCHSTONE™ 1 is a high-performance UT gauge. It is a low cost, simple to use handheld thickness gauge, often known as an ‘Ultrasonic Thickness Gage’ in the USA.
It is suitable for use for a variety of applications in NDT (Non-Destructive Testing) and is capable of measuring most engineering materials including plastic, glass, copper, cast iron and aluminium, as well as a wide range of steels.
Ultrasonic thickness testing is used in quality control during manufacturing and as an inspection tool to measure the remaining wall thickness of materials – subject to erosion and corrosion.
The TOUCHSTONE™ 1 works using sound velocity. The TOUCHSTONE™ 1 ultrasonic thickness gauge sends ultrasound through the material you are measuring. The speed that it moves through the material gives a measure of the thickness of the material.
All of the velocities in this sound velocity table are approximations –
| Material | Sound Velocity Inch/µSecond | Metres/second |
| Air | 0.013 | 330 |
| Aluminium | 0.250 | 6300 |
| Alumina Oxide | 0.390 | 9900 |
| Beryllium | 0.510 | 12900 |
| Boron Carbide | 0.430 | 11000 |
| Brass | 0.170 | 4300 |
| Cadmium | 0.110 | 2800 |
| Copper | 0.180 | 4700 |
| Glass(crown) | 0.210 | 5300 |
| Glycerine | 0.075 | 1900 |
| Gold | 0.130 | 3200 |
| Ice | 0.160 | 4000 |
| Inconel | 0.220 | 5700 |
| Iron | 0.230 | 5900 |
| Iron (cast) | 0.180 | 4600 |
| Lead | 0.085 | 2200 |
| Magnesium | 0.230 | 5800 |
| Mercury | 0.057 | 1400 |
| Molybdenum | 0.250 | 6300 |
| Monel | 0.210 | 5400 |
| Neoprene | 0.063 | 1600 |
| Nickel | 0.220 | 5600 |
| Nylon, 6.6 | 0.100 | 2600 |
| Oil (SAE 30) | 0.067 | 1700 |
| Platinum | 0.130 | 3300 |
| Plexiglas | 0.110 | 1700 |
| Polyethylene | 0.070 | 1900 |
| Polystyrene | 0.0930 | 2400 |
| Polyurethane | 0.0700 | 1900 |
| Quartz | 0.230 | 5800 |
| Rubber, Butyl | 0.070 | 1800 |
| Silver | 0.140 | 3600 |
| Steel, Mild | 0.230 | 5920 |
| Steel, Stainless | 0.230 | 5800 |
| Teflon | 0.060 | 1400 |
| Tin | 0.130 | 3300 |
| Titanium | 0.240 | 6100 |
| Tungsten | 0.200 | 5200 |
| Uranium | 0.130 | 3400 |
| Water | 0.0584 | 1480 |
| Zinc | 0.170 | 4200 |
- Calibrate the sensor using the inbuilt calibration block.
- Identify what substance you want to measure the thickness of.
- Use the Sound Velocity Table to ascertain the relevant speed of sound for the substance.
- Use the up and down velocity arrows to set the required speed.
- Place couplant on the substance being tested and press the sensor down. The thickness will be displayed.
- TOUCHSTONE™ 1 thickness gauge with embedded stainless 5mm calibration block
- Ultrasonic sensor
- 125ml bottle of couplant
- Full operating instructions
- 2 x 9v PP3 batteries
- Foam-lined black polymer carry case
The TOUCHSTONE™ 1 Ultrasonic Thickness Gauge can be used in a variety of locations and used for a variety of different applications.
The TOUCHSTONE™ 1 can be used in:
- In shipping
- Offshore
The TOUCHSTONE™ 1 can be used on:
- Oil and gas containers
- Storage tanks
- Pipelines
- Bridges
- Road tankers
- Lighting columns
The TOUCHSTONE™ 1 ultrasonic thickness gauge is widely used within the marine industry by both marine and CLASS surveyors.
The TOUCHSTONE™ 1 ultrasonic thickness gauge is simple to calibrate and operate and process accurate and reproducible results.
- Operational Weight – 326g
- Shipping Weight – 750g
Unit –
- Weight – 250g
- Dimensions – 132 x 82 x 33mm
Sensor –
- 5MHz Ultrasonic Thickness
Carry Case –
- Dimensions – 220 x 200 x 80mm
Power Supply –
- 1 x 9v PP3 alkaline battery
- Battery life – 40 hours nominal with PP3 alkaline battery
Temperature Range –
- -10°C to +50°C
Thickness Range –
- 0 to 199.9mm
Resolution –
- 1mm
Accuracy –
- ±1mm
Velocity Adjustment –
- 0 to 999metres / sec
Display –
- 5mm high LCD Screen
- Back light auto shut off after 3 mins in robust casing waterproof to IP66
ISO 9001:2015
NATO Stock Number 5220-99-290-7166
NCAGE Number U0B22
CE Mark Directives & Laws 89/336/EEC (Electromagnetic Compatibility)
IIMS Corporate Membership Number C508
NFPA Membership Number 2800960
FPA Membership Number 27135
English 
German 
French 
Dutch 
Spanish