Tritex NDT will be shut from 12:00 22nd December 2022 until 09:00 3rd January 2023. We would like to thank all of our customers for keeping us very busy this year. We wish everyone Seasons Greetings and a Happy New Year.

Small Craft Surveyor

Tritex NDT manufacture an ultrasonic thickness tester ideally suited to the small craft surveyors. Tritex NDT have a close affiliation with the International Institute of Marine Surveyors and many of their members are current users of our thickness testers. The most popular ultrasonic thickness tester for this application is the Multigauge 5650 surveyor gauge with 3.5MHz probe, which gives the user the best options for measuring thinner material in a very corroded state. Additionally, the Multigauge 5750 Datalogger allows the user to store measurements from their survey to be uploaded using wireless technology when back in the office.


Constant monitoring of corrosion levels are vital to maintain the safety of the ship and her crew. Vessels often suffer the most severe cases of metal wastage due to the corrosiveness of salt water. Tritex multigauges can test steel thickness in even the most difficult applications. This is why class societies, including IACS, actually recommend gauges that use multiple echoe and single crystal probes when carrying out surveys on ships.

Even on pitted surfaces, the single crystal probe can ‘straddle’ a couplant filled pit and give a true thickness measurement from the bottom of the pit to the back wall.


The Multigauge 5500 ultrasonic thickness tester has a bright LED display on the top of the gauge which can be easily viewed when mounted onto the chest harness straps during rope access operations. The clever mounting system ensures the steel thickness gauge hangs vertically so the display is always visible.

Mounting the ultrasonic thickness tester onto the chest harness eliminates the need to also wear a belt and avoids the gauge swinging around if a neck strap is used or if it is attached to gear loops, preventing damage to the gauge. The probe cable socket has been mounted on top of the gauge so the probe can be easily stored in a top pocket, or around the back of the neck, between measurements.