S311 is an ultra-high-sensitivity gas detection instrument that adopts a pump suction detection method. Different detection principles are used according to different gases. It is small in size, easy to operate, convenient to carry, and can also be equipped with a flexible probe with a comfortable hand feel.

Detectable gases: Methane, natural gas, ammonia gas, hydrogen gas, coal gas, propane, acetone, gasoline, coolant, ethanol, oxide, hydrogen sulfide, paint, thinner, oxygen, carbon monoxide, chlorine gas, toluene, industrial solvents, alcohol, gas fuel, and other toxic and harmful gases such as other organic liquid vapors.