Our products includes: Gas sensor and module: Detected gases: * Oxygen (O2); * Carbon Dioxide gas (CO2); * Toxic gases: CO,H2S,NH3,HCL,SO2,NO2,CL2... etc. *Combustible gases such as methane(CH4), propane(C3H8), butane(C4H10), Hydrogen(H2) * Air Quality: VOC, ETO, Ozone(O3), Alcohol(C2H5OH), smoke, formaldehyde, toluene, acetone, benzene…etc. ? Flow sensor ? PIR sensor ? Humidity sensor ? Think film circuit