The gas leak detector is a stand-alone device that if it smells gas will produce an optical-acoustic alarm. The unit can be used in both domestic and commercial premises. Since LPG is heavier than air and will remain in low places it is a must that this unit is fixed very low at around 30cm from the floor and close to the gas system in use such as cooker, fireplace, boiler and more. The detector just needs a 230V supply cable to power it up/ the unit is made for internal use only (IP42). In an alarm situation the detector will have a red LED and an acoustic buzzer on (85Db/1m).