To prevent gas explosion or bomb, gas alarm warning people are far from danger field.

                         gas alarm

 Product description: 1,Hot wire type sensor 2,Power:110VAC/220VAC/230VAC,9V-20DC 3,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(optional)  (2) Circuit for normally opened rely contacts (optional)  (3)Operating Frequency:433 MHZ/315MHZ (optional) 6,Size:115mm*71mm*43mm 7,Weight:228g/pcs 8,Package size:58.5cm*28.5cm*53.3cm 9,Quantity/Box:100pcs 10,CtnWei(kg):24.68kg 11,Q`CTY/20`FT:35200pcs If you want to know more informations, please contact us, thanks. Summer Pan