Topinst TG 100 is a portable ultrasonic tester or ultrasonic thickness gauge with an easy-to-read 4-digit display. This ultrasound-based thickness meter uses a contact transducer (included) to measure the thickness of ferrous and non-ferrous metal, glass, plastic and other homogeneous materials including aluminum, brass, copper, iron, lead, nickel, steel, gold, titanium, pyrex and quartz glass, nylon, polyethylene and silicone rubber.See accessories for high-temperature, miniature and replacement transducer, contact gel and ISO calibration options.