Demco Manual Call Point D-118 is suitable for open or close circuit system and is professionally designed for use in fire detection systems with central control equipment. Alternative terminals are provided for open or close circuits. When wired for open circuit operation, the circuit closes instantly when the glass is broken. Cable knockout seals are provided for 3/4" Ø conduit entries from top, bottom and the back. All metal parts are made of brass and phosphor bronze to ensure life long resistance against corrosion. Demco Manual Call Point D-118 is designed to meet the requirement of BS5839 Part 2 and EN54 Part 2.