Alarms for the detection of inflammable gases; Apparatus for analysing gases; Combustible gas concentration detectors; Electronic valves for controlling gas or fluids; Gas alarms; Gas detectors for detecting the presence of gas; Gas sensors for measuring gas concentration; Gas testing instruments; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Wireless controllers...

Sensors used to measure one or more parameters, namely, density, viscosity, dielectric constant, refractive index, and temperature of flammable liquids or gases to monitor the quality of the liquid or gas