Tightness Testing

If you want to find a hole in vessel or a tank, there is a good chance that ultrasonic can help.

Often called ‘UT’ or ‘UT testing’ this involves the generation of ultrasonic sound using an ultrasonic transmitter, placing this physically on one side of the object/item you are testing and then checking with a receiver tuned to the transmitter frequency to see if there is any ultrasound. The ultrasound can only go through an air hole meaning it detects any air leaks.

Ultrasound is not audible so the receiver converts the ultrasound to an audible sound.
This audible sound is heard through headphones or a small internal loudspeaker. If you want to know the size of the hole, then we have products that will display the intensity in decibels. Decibels are the universal unit for sound measurement.

If it needs precision measurements, we suggest our Door-Safe.

CABIN-SAFE Ultrasonic Leak Detection System
DOOR-SAFE Watertight Tester

If it is on a small scale and is a low budget i.e. testing trams, trains, cars, containers etc. then our Cabin-Safe System is recommended. If you want to know if there is a hole in a pipe or container of pressurised gas then there is no need for a transmitter. The escaping gas, unless it is a very small hole, will cause a turbulence which will produce sound. This sound is often above the frequency than we can hear ( greater than 15KHz ). To hear this leakage a receiver is needed and as the range of frequencies given off by the escaping gas is unknown then a wide frequency range receiver is needed. Our Sonic Leak Detector ( SLD ) accepts a very wide range from 20KHz to 200KHz. The receiver converts the inaudible sound into an audible sound heard with the headphones.


Ultrasonic Testing Equipment

DOOR-SAFE Watertight Tester
Water-Tight Tester

The fully ABS Type Approved Door-Safe™ ultrasonic kit is used to rapidly and accurately test the integrity of water-tight doors and hatches.The Door-Safe™ WT tester kit consists of 2 units, an ultrasonic transmitter unit and a portable, hand-held receiver unit connected to a …

CABIN-SAFE Ultrasonic Leak Detection System
Ultrasonic Leak Detecting System

A smaller, less powerful version of Class Instrumentation Ltd’s CARGO-SAFE™ unit, this boat survey product is perfect for detecting the source of leaks in small pleasure craft, yachts, cars and caravans. To use the Cabin-Safe, the Transmitter unit is placed inside the vessel …

Ultrasonic Leak Detector
Sonic Leak Detector
Rapid detection of pressurised gases escaping

The Class Instrumentation Sonic Leak Detector is a low cost instrument that allows the rapid detection of pressurised gases escaping from any form of plant system.The ultrasound “noise” generated by a leak can be easily …

Working With Excellence

Cargo Water Ingress Prevention Testing
Water Ingress Detection System for Ships

Water Ingress Detection

  • Cargo hatch covers
  • Naval door transits
  • Water-tight & weather-tight doors
  • Yachts
  • Shipping containers
  • Atriums
  • Trains, Trams & aeroplanes

  • Submarines and submersibles
Ultrasonic Tightness Testing
Watertight Testing for Doors and Hatch Cover

Tightness Testing

  • New housing
  • Naval citadels
  • Medical cabinets
  • Marine buoyancy compartments
  • Negative & positive hospital rooms
  • Laboratories and quarantine facilities
  • Refrigerated enclosures both
  • Domestic and industrial
Liquid Level Gauge for Tanks and Cylinder
Ultrasonic Liquid Level Indicator

Liquid Level

  • Pressurised liquid fire suppression systems
  • Cruise ship
  • Computer servers
  • Mining-industries
  • Rocket launch facilities
  • Hospital gas and air systems
  • Power Plants
  • Industrial tanks
Water Ingress Testing for Doors
Leak Detection Testing

Leak Detection

  • Power plants
  • Aerospace craft
  • Refrigerants in air conditioner units
  • Corona discharge in electrical cabinets
Ultrasonic Air Leak Detection
Ultrasonic Thickness Testing

Thickness Gauge

  • Ship hulls & decks
  • Fuel tanks
  • Pressurised cylinders
  • Coatings on ferrous sub-straits
Equipment Scheduled Maintenance
Planned Maintenance Programme

Programmed Maintenance

  • Programmed Maintenance for all industries
  • Machinery and bearings
  • Engines and transmission
International Customer Base and Exceptional Service.

Accreditations and Affiliations

ABS Type Approved Equipment

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    World Leading Designers and Manufacturers

    Designed and Manufactured in Great Britain

    We are proud to be British based designers and manufacturers of world-leading ultrasonic water integrity testers, liquid level indicators and non – destructive test equipment.