GN8010-E Point-Type Toxic gas detector(Gas Alarm)        ■ Model Guide：       ■ Dimension & Mounting(Unit:mm)：       ■ Wiring terminals：     Terminal No. J1 Foot 1 2 3 4 5 6 Symbols V+ S V- NC C NO Note Power Cathode 4 ~ 20mA signal Power to Permanent closure Public Normally open Terminal No. J1 Foot 1 2 3 4 5 6 Symbols V+ V+ DA DB V- V- Note Power Cathode Power Cathode RS485 + RS485 - Power to Power to     ■ The type of gas：   Natural gas(LNG) LPG Gas Alkanes Alcohol Acetone Benzene Gasoline Volatile liquid Hydrogen Ammonia Carbon monoxide Carbon dioxide Hydrogen sulfide Oxygen Nitric oxide Nitrogen dioxide Sulfur dioxide Chlorine Formaldehyde Other combustible gases   These commonly used for gas, other gases information, please see《 Schedule Gas Detection 》Or Call Advisory。