Waterproof Gas Detector BS-685 with Relay for Fire Detection Panel 921685000
LPG waterproof gas detector (IP65). Activated when the liquefied petroleum gas (propane or butane) content in the covered area exceeds 5-15% of L.E.L. (low explosive limit). It has an LED indicator which, in case of activation, lights up. The command to the panel is given by a relay contact. BS-686 from Olympia Electronics.