The GAS ALARM GX-B2 with external sensor is a gas warning device for city, natural andliquefied gases and can already deliver a warning at a gas concentration that lies well belowlife-threatening values. This monitoring system is, therefore, in line with its purpose, set to avery high sensitivity (see table TECHNICAL DATA). The alarm is signalled acoustically andoptically. The unit is suitable for normal household use and may not be used in areas at riskof explosion.Another use of the device as described above is not authorized.