• multiple echo ultrasonic thickness gauges

  • underwater thickness gauges

    Diver hand held gauges for ease of use

  • measure through coatings

    Thick coatings are ignored - only the metal thickness is measured

  • simple accurate robust

    Intelligent Probe Recognition, Automatic Measurement Verification and No Zeroing

  • gauges designed for rope access

    Mounts onto a belt or harness to keep hands free

Tritex NDT Ultrasonic Thickness Gauges

Tritex NDT manufacture multiple echo ultrasonic thickness gauges designed to monitor corrosion levels and check metal thickness without removing coatings

Coatings up to 20 mm are completely ignored. We supply ultrasonic thickness gauges worldwide for use in all applications where metal thickness is a concern.

Performance is the most important feature of our ultrasonic thickness gauges. They give reliable accurate measurements in the most demanding of applications. Whether it’s coated, bare metal, heavily corroded or clean, the Tritex Multigauge range has proven to be reliable, simple, accurate and robust. Single crystal probe technology avoids problems with ‘V’ beam error associated with twin crystal probes.

All our ultrasonic thickness gauges have Intelligent Probe Recognition (IPR), Automatic Measurement Verification System (AMVS) and Coating Plus+. Tritex Multiple Echo thickness gauges significantly reduce preparation time as they eliminate the need to remove surface coatings.

Multigauge 5500 Waist

Multigauge 5500 Waist

Mounts onto a belt or chest harness for hands free use. Bright LED display. Top display for convenient viewing.

Multigauge 5600 Hand Held

Multigauge 5600 Hand Held

On screen user information such as probe frequency and remaining battery. Colour LCD display. Easy to use keypad and menu system.

Multigauge 5700 Datalogger

Multigauge 5700 Datalogger

Stores measurements in a grid, string or combination of both. Easy template setup. Transmits data to the PC using wireless technology.

Multigauge 3000 Underwater Diver

Multigauge 3000 Underwater Diver

Large bright 10mm display. Integral battery with 55 hours runtime. Can be easily upgraded to a topside repeater. 500m depth rating.

Multigauge 4000 Underwater ROV

Multigauge 4000 Underwater ROV

Two models available for 1000m and 4000m depths. Simple and easy to install. Fits most work class ROV’s.

Multigauge 3100 Surface Display Unit

Multigauge 3100 Surface Display Unit

Used with the Multigauge 3000 to provide displayed measurements on the surface. Two way communication to the Multigauge 3000. Ideal for class surveys or when visibility is poor.

ROV Probe Holder

ROV Probe Holder

Perfectly presents probe to the surface being measured. Provides probe protection against hard knocks. Fits most work class ROV’s.

Communicator Software

Communicator Software

Simple software which displays measurement results from the Multigauge 3000 or Multigauge 4000. Stores measurements in a string, grid or combination of both. Files can be easily exported.


  • Ignore coatings up to 20mm thick using multiple echo.
  • No zeroing required.
  • No calibration at switch on.
  • No removing coatings.
  • Large bright displays for all conditions.
  • Easy to use menus.
  • Single probe type for all applications.


  • Intelligent Probe Recognition (IPR) for enhanced performance.
  • Automatic Measurement Verification System (AMVS).
  • Single crystal probe to avoid ‘V-beam’ error.
  • Can be calibrated for all metal types.
  • Free annual calibration for the life of the gauge.
  • Switchable between metric and imperial measurements.
  • All gauges are manufactured to, and comply with, BS EN 15317:2013. This standard covers the characterisation and verification of ultrasonic thickness measuring equipment to ensure they meet certain criteria of performance and build quality.


  • Extremely rugged and robust.
  • ‘O’ ring sealed connectors on surface and underwater gauges.
  • Optional leather case with neck strap for surface gauges.
  • Protective membranes to prevent probe wear.
  • 3 year warranty.
  • Supplied in heavy duty hard durable carry cases.

Applications of Tritex NDT Products

About Tritex NDT

Tritex NDT has grown to be one of the leading manufacturers of ultrasonic thickness gauges worldwide. Our experienced technicians pioneered multiple echo into hand-held ultrasonic thickness gauges in the 1980’s. We understand the problems faced by customers in all applications in the field of NDT and we aim to provide the best possible solutions. Our knowledge has been applied to the design, manufacture and marketing of our gauges.

Our use of the Multiple Echo method ensures that protective coatings remain undamaged, therefore eliminating the need for costly replacement.

Tritex NDT is committed to ensuring that all customers are provided with the highest level of products and services from first contact and throughout the active life of the product. We are acutely aware of the value of after sales care. All products are designed and manufactured in the the United Kingdom.

Tritex NDT Ltd is an ISO9001:2008 certified company.

Customer Testimonials

Solent Refit - United Kingdom

“Your gauge is so fool proof to use, all of our people can do their own gauging”

SeaTech Commercial Diving Services Ltd, United Kingdom

“ We have a lot of experience using underwater thickness gauges but my team insist on using only the Tritex gauges now. The Multigauge 3000 gives stable measurements and locks onto readings instantaneously"

Valkyrie Diving, United Kingdom

“The Multigauge 3000 is absolutely brilliant, we love it! If there was any problem we would tell you. Also, the service is excellent!”

Elliot Berry Marine Services - United Kingdom

“Just to let you know I’m very impressed with the gauge and the after sales service is excellent”

Broomfield Marine Services - United Kingdom

“The company is one of the most honest and reliable suppliers I have dealt with…”

Sonometric, South Africa

"Tritex gauges are the best thickness gauges I have used..."

Jab Construction Ltd - Zimbabwe

“You are so efficient!”

Captain Joseph Zerafa, Malta

“Excellent service throughout”



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