KIDDE ch4 smart 3 methane detector · ip 55, detects lpg, gpl, lp gas and liquefied petroleum gas compounds in % lfl., consumption 90ma. output current 4-20 ma., 3 voltage-free relays (fault, monitoring, alarm), self-diagnosis. zero follower. digital filter, ip55-rated enclosure. dimensions 18x10x6.5 cm. weight 0.6kg