The majority of NDT Testing applications require ultrasonic couplant to be used in order to facilitate the transmission of sound waves between the transducer (resting equipment) and the piece being tested.

Overall Couplants are non-toxic gels, pastes or liquids. Their use within Ultrasonic NDT is crucial as ultrasonic frequencies do not transmit adequately through “the air” and even tiny gaps between the transducer and the test piece/material can result in acoustic impendance, therefore inhibiting the resting procedure and the results.

Sonatest manufacture and supply a range of ultrasonic couplants covering a spectrum of end user requirements.

The Sonagel range is designed for use on all types of metallic surface and is especially suited to solving the problems of rough, pitted, uneven surfaces allowing smooth probe movement during testing. The thixotropic properties of this couplant give excellent wetting and acoustic transmission and do not allow the product to flow all over the test area. This makes it very economical to use as you only cover the working area and not the whole piece, and is especially suitable for vertical and overhead surfaces.

This couplant is designed for use on all types of metallic surface and is especially suited to solving the problems of rough, pitted, uneven surfaces to allow smooth probe movement during testing.

The thixotropic properties of this couplant give excellent wetting and acoustic transmission and do not allow the product to flow all over the test area; and so is very economical to use as you only cover the working area not the whole piece.

Sonagel D1 is designed for use on all types of metallic surface and is especially suited to rough, pitted, uneven surfaces allowing smooth probe movement during testing. The thixotropic properties of this couplant give excellent wetting and acoustic transmission and do not allow the product to flow all over the test area. This makes it very economical to use as you only cover the working area and not the whole piece, and is especially suitable for vertical and overhead surfaces.

This product is designed for use on all types of metallic surface and is especially suited to solving the problems of rough, pitted, uneven surfaces allowing smooth probe movement during testing.

The thixotropic properties of this couplant give excellent wetting and acoustic transmission and do not allow the produce to flow all over the test area. This makes it very economical to use as you only cover the working area and not the whole piece and is especially suitable for vertical and overhead surfaces.

This product is designed for use on all types of metallic surface and allows smooth probe movement during testing, at elevated temperatures. This gives good probe contact and acoustic transmission and prevents flow over the test area. It is very economical to use as you only cover the working area and not the whole piece.