... Work with burglar alarm system,Can detect coal gas,natural gas and pettroleum gas ,LPG Wireless gas leakage sensor Work with burglar alarm system ... ,Can detect coal gas,natural gas and pettroleum gas ,LPG Description and Main functions Power Requirements:9 ... Freqency:315±0.2Mhz/433±0.2MhzKind of gas:coal gas,natural gas and pettroleum gas Alarm density:0.1% to 0.5%(coal ...