1:for lpg, co, h2s gas etc 2:catalytic,electrochemical, pid sensor 3:Explosive-proof 4: ... can network with our gas monitor JB-TB-AT2020SH,JB-TB-AT2020DH and JB-TB-AT2020FH.Feature:1.Adopts imported sensor with high measurement ... :10%~93%RH(incondensable); pressure range:86~106kPa Cheaper combustible gas detector with real-time display