1:for lpg, co, h2s gas etc 2:catalytic,electrochemical, pid sensor 3:Explosive-proof 4:ISO9001&CE 5:4~20mA output It's a lpg gas detector, Gas Analyzer, Alarm with HBUS signal transmission.It can network with our gas monitor JB-TB-AT2020SH,JB-TB-AT2020DH and JB-TB-AT2020FH.Feature:1.Adopts imported sensor with high measurement accuracy, high stability, strong anti-poisoning and anti-interference ...