PCE-TG 250 is a portable Thickness Meter with an easy-to-read 4-digit display. This ultrasound-based Thickness Meter uses a contact transducer (included) to measure the thickness of coated and uncoated 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 replacement contact gel and ISO calibration options.