JA-180G wireless gas leak detector. The JA-180G gas-leak detector responds to combustible gases and vapors (natural gas, methane, propane, butane, acetylene, etc.). When activated, the unit sends a fire alarm signal and it has an alarm siren built in. Its relay output can be used for example to close the gas supply via a suitable electric gas valve The detector performs regular auto testing. Addressable and occupies one alarm system position.