1、Hot wire type sensor2、Power:110VAC/220VAC/230VAC 、9V-20VDC3、Working temperature: -10degree~60 degree 4、Alarm density: Coal gas: 1000~5000ppm, Liquid petroleum gas:1000~10000ppm, natural gas: 1000ppm~5000ppm 5、Interconnecting Gas detector (1)Circuit for normally closed rely contacts (2) Circuit for normally opened rely contacts (3)Operating Frequency: 433 MHZ/315MHZ (optional)6、Size:115mm*70mm*40mm7、Weight:228g/pcs 8、Package size:58.5cm*28.5cm*53.3cm9、Quantity/Box:100pcs10、CtnWei(kg):28kg11、Q`CTY/20`FT:35200pcs