The Elcometer NDT CG30 Corrosion Ultrasonic Thickness Gauge (part number CG30) is a handheld ultrasonic gauge that is calibrated on site by the user to give accurate thickness measurements across a wide variety of material substrates. This product has been discontinued; contact BAMR for a recommended replacement model.

Corrosion thins the walls of pipelines, tanks and metal structures from the inside, and a wall that looks intact can be close to failure. The CG30 sends an ultrasonic pulse into the material and times the echo to calculate remaining thickness, so inspectors can find metal loss before it becomes a leak. Its high speed scan mode takes 16 readings per second, letting the user sweep an area quickly to locate defects or identify the thinnest point, which is useful on pipelines and large test surfaces. Calibration options include single point, two point and speed of sound for optimal accuracy, and the gauge accepts a wide range of interchangeable transducers.

The gauge works in Pulse-Echo mode at 4 readings per second in manual mode over a measuring range of 0.63 to 500mm, with accuracy of plus or minus 0.01mm and resolution of 0.01mm. The velocity calibration range is 1250 to 10,000m/s. It uses a dual element transducer with a 1 to 10MHz frequency range, automatic V-path correction and manual probe zeroing. The aluminium case has gasket-sealed end caps and a waterproof membrane keypad, and runs up to 200 hours on 2 AA batteries. The CG30 was supplied by BAMR, South Africa's authorised Elcometer distributor.