Detected gases include: methane (CH4), ethylene (C2H4), ammonia (NH3), carbon dioxide (CO2), hydrogen sulfide (H2S), hydrogen chloride (HCl) and hydrogen fluoride (HF). Other gases can be added. The device consists of separate transmitter and receiver, certified for using in potentially explosive environments. The gas alarm components have corrosion-resistant corpuses from high-grade stainless steel 316. Gas detector ideally suits for using coastal and offshore structures, in the street and indoors. If it is not necessary in consumables and patented feature of daily automatic self-test SimugasTM, gas detector Senscient ELDS TM has lower expenses on installation and operation in comparison with traditional detectors of toxic gases, discovering the detected gas.