DUAL SENSOR ALARM – LPG & CARBON MONOXIDE WG200-LC Ocean Safety offer a complete range of gas alarm systems for detecting LPG (butane/propane) and carbon monoxide. These systems use modern technology to provide unrivalled protection, the alarm system incorporates a unique waterproof sensor. Carbon monoxide is a poisonous gas given off when fuels are burnt. A faulty appliance or adverse weather conditions can quickly result in a dangerous build up, which can only be detected with an alarm system.