Natural gas alarm is that to prevent gas explosion or bomb, gas alarm warning people are far from danger field. There have excellent quality,attactive appearance,steady performance,ect for gas alarm. Natural gas alarm Product description: 1��ot wire type sensor 2��ower竊�10VAC/220VAC/230VAC ��2VDC/24VDC 3��orking temperature竊�degree~60degree 4��larm density竊�Coal gas竊�1000~5000ppm, Liquid petroleum gas竊�000~10000ppm, natural gas竊�000ppm~5000ppm 5��nterconnecting Gas detector (1)Circuit for normally closed rely contacts (optional) (2) Circuit for normally opened rely contacts (optional) (3)Operating Frequency竊�33 MHZ/315MHZ (optional) 6��IZE竊�15mm*71mm*43mm 7��eight竊�28g/pcs 8��ACKAGE size竊�8.5cm*28.5cm*53.3cm 9��uantity/BOX竊�00pcs 10��tnWei竊�g竊��28kg 11��`CTY/20`FT竊�35200cs 12, ...... If you want to know more informations , please cotact us. Welcome to China and visiting our factory! Summer Pan (export.summerpan at hotmail )