Ultrasonic Thickness Gauges

The Cygnus Difference

All Cygnus ultrasonic thickness measurement gauges use the multiple-echo technique to deliver true metal wall thickness readings through paint, coatings, rubber linings and bitumen up to 20 mm thick. Unlike conventional single-echo ultrasonic testers that require a bare metal surface, Cygnus UT gauges need no surface preparation saving hours of survey labour and eliminating risk of coating damage. The result is faster, safer and more repeatable non-destructive testing across every application.

Class approved and standards compliant

Every Cygnus ultrasonic thickness tester is designed and manufactured to comply with ASTM E797 and ISO 16809, the internationally recognised standards for manual ultrasonic thickness measurement. Cygnus UT gauges are accepted by all major classification societies including Lloyd’s Register, DNV, ABS, Bureau Veritas and ClassNK for IACS-compliant thickness surveys.

Purpose-built for marine, offshore and industrial environments

Every Cygnus ultrasonic metal thickness gauge is engineered to survive harsh environments, saltwater spray, extreme temperatures, rough handling and confined spaces. IP-rated housings, glove-friendly controls and ergonomic designs ensure reliable wall thickness measurement when conditions are most demanding. These are not general-purpose thickness testers — they are purpose-built ultrasonic testing instruments for heavy industry.

ATEX certified options for hazardous areas

The Cygnus 1 Ex is an intrinsically safe ultrasonic tester certified to ATEX and IECEx standards for Zone 1 and Zone 2 hazardous areas. It meets the requirements of offshore oil and gas platforms, petrochemical plants and refineries where standard thickness measurement tools cannot be used. Full ultrasonic testing capability in the most demanding environments on earth.

Trusted by inspection professionals in over 60 countries

Since 1988, Cygnus Instruments has been designing and manufacturing ultrasonic testing equipment for heavy industry. Cygnus ultrasonic metal thickness testers are used by port state control authorities, classification society surveyors, offshore operators, commercial diving companies, petrochemical plants and shipping companies worldwide. When accuracy in non-destructive testing matters, professionals trust Cygnus.

Ultrasonic Thickness Measurement for Every Industry

Cygnus ultrasonic thickness gauges, UT gauges and ultrasonic testers are designed for professionals across marine, offshore, oil and gas, petrochemical, diving, pipeline and industrial sectors. Each instrument is purpose-engineered for the demands of its target environment from ATEX certified ultrasonic metal thickness testers for explosive atmospheres to depth-rated wall thickness measurement tools for commercial diving operations.

Ultrasonic Thickness Measurement for Marine & Shipping

Marine surveyors and ship superintendents rely on Cygnus UT gauges for hull wall thickness measurement on class renewal surveys, port state control inspections, dry-dock surveys and cargo tank non-destructive testing. Cygnus ultrasonic thickness testers are accepted by all major classification societies for IACS-compliant surveys on bulk carriers, tankers, container ships and offshore support vessels.

UT Gauge and Ultrasonic Testing for Offshore Oil & Gas

Offshore inspection engineers use Cygnus ultrasonic metal thickness gauges for platform deck plate surveys, subsea pipeline wall thickness measurement, FPSO hull monitoring and riser inspection. The Cygnus 1 Ex (ATEX / IECEx certified) is the required non-destructive testing instrument in Zone 1 and Zone 2 hazardous areas where standard ultrasonic testers cannot be deployed.

Non-Destructive Testing and Wall Thickness Measurement for Petrochemical Plants

Cygnus ultrasonic thickness measurement gauges support API 570 pipe wall thickness measurement, API 510 pressure vessel inspection and ASME-compliant storage tank non-destructive testing. The Cygnus ECHO corrosion mapping system replaces manual UT gauge readings with rapid area-scanning, reducing inspection time and delivering comprehensive wall thickness measurement reports.

Underwater Ultrasonic Thickness Measurement for Commercial Divers

Commercial divers use the Cygnus DIVE and Cygnus 4 wrist-mounted UT gauge for underwater hull thickness measurement without dry-docking, subsea pipeline non-destructive testing and offshore structure integrity surveys. These depth-rated ultrasonic testers deliver accurate wall thickness measurement through marine growth and coatings — no scraping required.

Ultrasonic Tester for Port State Control and Classification Society Surveys

Port state control officers and classification society surveyors across Lloyd’s Register, DNV, ABS, Bureau Veritas and ClassNK rely on Cygnus ultrasonic thickness meters for rapid, reliable non-destructive testing during vessel inspections. Measurement results from Cygnus UT gauges meet all IACS requirements for thickness measurement documentation.

Wall Thickness Measurement for Pipeline Integrity Management

Pipeline integrity engineers use Cygnus ultrasonic thickness measurement gauges for API 570 wall thickness measurement programmes, corrosion under insulation (CUI) non-destructive testing and fit-for-service evaluations. The Cygnus ECHO semi-automated thickness measurement tool generates colour-coded corrosion maps across pipe runs — replacing point-by-point UT gauge readings with comprehensive area data.

Ultrasonic Testing and Thickness Measurement for Industrial NDT

Industrial NDT technicians and plant maintenance engineers use Cygnus ultrasonic thickness testers for structural steel inspection, fabrication quality control, pressure testing verification and routine plant maintenance. As a professional non-destructive testing instrument, the Cygnus range provides the measurement accuracy and build quality demanded by industrial environments.

Why Choose Cygnus for Ultrasonic Thickness Measurement?

Cygnus Instruments designs, manufactures and supports every ultrasonic thickness gauge and UT gauge at our facility in Dorset, UK. When you buy Cygnus, you deal directly with the engineers who built your thickness measurement tool ensuring full technical support, rapid spare parts supply and continuous product development.

ISO 9001 certified manufacturing

Cygnus Instruments is ISO 9001 accredited. Every ultrasonic thickness tester and ultrasonic metal thickness gauge leaves our facility tested, calibrated and certified to international non-destructive testing standards backed by a complete quality management system.

Over 35 years of ultrasonic testing expertise

Since 1988, Cygnus has focused exclusively on ultrasonic testing instrumentation. Our narrow specialisation means deeper expertise in the multiple-echo technique, in marine and offshore wall thickness measurement, and in designing UT gauges that perform reliably in the world’s harshest environments.

Global support for every thickness measurement tool

Cygnus ultrasonic thickness meters and UT gauges are supported by an international network of authorised distributors and service centres. Calibration certificates, repairs, operator training and spare parts are available locally in all major marine and offshore hubs worldwide.

Proven non-destructive testing performance

From the North Sea to the South China Sea, Cygnus ultrasonic thickness measurement gauges operate aboard bulk carriers, tankers, offshore platforms, subsea ROVs and in the hands of commercial divers. Our reputation in non-destructive testing is built on 35+ years of field-proven reliability not laboratory claims.