Four gas detector type is the company using the U.S. Pu Linke company RF Admittance Level Controller full large parts assembled. Electronic circuit uses the U.S. Pu Linke anti-adhesion circuit, carbon monoxide gas detector can detect the true level while adhering clear and hung RF Admittance type sensor according to the principle, can detect a variety of container materials There are (high) or without (low). It can match the type and type sensing probe is a universal probe, gas gas detector is flat probe, the probe also provide rope with stainless steel structure and it can used in high temperature, high pressure, liquid, powder, big solid block materials and corrosive substances. http://www.dingdinggroup.com/