1、Hot wire type sensor2、POWER:110VAC/220VAC/230VAC 3、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:163mm*87mm*40mm7、Weight:400g/pcs 8、Package size:65cm*46cm*39cm9、Quantity/Box:100pcs10、CtnWei(kg):45kg11、Q`CTY/20`FT:27000pcs