... &*Version*=1&*entries*=0Xi'an Hua Fan Instrument Co.,Ltd is one of the leading 12 portable gas ... welcome to buy or wholesale gas alarming detectors, CO detector, carbon monoxide detectors made in China from ... voltage instructions, the screen can be rotated 180 degrees and can be used for different habits with ... (O2), gas (EX), poisonous and harmful gases (CO, H2S, NH3, CL2, etc.)Response time: ≤30s(O2 ...