Panasonic liquid leak/liquid detection fiber corresponds to various liquid events, from the contact (wetted) type to the pipe mounting type, and up to leak detection. The sensor will turn OFF during abnormal conditions (excess fluid, fiber disconnection, etc.)! Liquid absent: Beam received (Output ON) Liquid present / fiber is cutoff: Beam not received (Output OFF). Bends easily with its small bending radius, protective tube is cuttable and extendable. Detect chemical leaks in semiconductor and LCD manufacturing processes. Side-mountable fiber head as slim as 10 mm 0.394 in is good to use in confined spaces. This fiber type sensor is safer to use with volatile materials (SEMI S2 compliant). The fluorine resin fiber head makes it ideal for use with chemicals.