Dakota Ultrasonic Couplant is a viscous gel used to transmit ultrasonic energy from a transducer into the material being tested during ultrasonic thickness and flaw measurement. Without a couplant, air between the probe and the surface blocks the sound signal, so the gel is what makes a reliable reading possible.

The gel is formulated to stay in place on both horizontal and vertical surfaces, so readings can be taken on pipework, tank walls and overhead sections without the couplant running off. Regular couplant covers a temperature range of -15 to 104 degrees C, and a high-temperature gel option extends to 398 degrees C for use with high-temperature transducers on hot surfaces.

The range is supplied in several formats to match the application and transducer. Standard couplant comes in 120 ml (V-000-0001), 360 ml (V-000-0003) and 4.5 L (V-000-0004) bottles, with a 120 ml low-viscosity version (V-000-0005) and the 60 ml high-temperature gel (V-000-0002). For underwater work there is a 6 g gasket lubricant (V-000-0007) and an O-ring kit of one lubricant and two gaskets (A-185-0001). Dakota Ultrasonic Couplant is used in ultrasonic NDT across corrosion monitoring, concrete and metal thickness testing, and industrial inspection.

Dakota Ultrasonic Couplant is supplied by BAMR, South Africa's authorised distributor.