Specifications: Gas sensor: TP-1. 1A, TP-2(detecting both flammable gas and CO) Power Supply: 220VAC, 110VAC, 12VDC, 24VDC( according to the customer's requirements) Ambient Temperature: -10~+55 Humidity: <=70%, non-concrete Housing Material: ABS Response time: <=200s Alarm level: LPG 0. 3%; Natural Gas 0. 5%; CO 0. 008%; H2 0. 04%. Alarm alerting: Visual and audio alarm Signal output: NO/NC, Pulse, Wireless signal(according to the customer's requirements) Dimension: 110*70*40(mm)