Gas detector Q45S

humiditydischargehydrogen sulfide

The Q45S Wet H2S Gas Detector offers continuous monitoring of Hydrogen Sulfide in both inlet and discharge air, where condensing humidity conditions are normal. The Q45S is an ideal solution for water and wastewater treatment applications. Continuous, Reliable H2S Monitoring in Wet Conditions Odor control in wastewater treatment plants and sewage collection systems often requires the use of scrubber systems. Many of these scrubbers employ a wet process using a hypochlorite solution to remove hydrogen sulfide (H2S) from air streams before discharge. Monitoring the hydrogen sulfide in both inlet and discharge air has presented problems for standard sulfide gas sensors. The Q45S Wet H2S gas monitor is a new type of gas sensor technology that allows continuous monitoring of hydrogen sulfide in both inlet and discharge air, where condensing humidity conditions are normal. Measurements may be either at the inlet to scrubber systems where gas concentrations can run as high as 200 PPM or at the outlet, where gas concentrations are ideally down below 0.5 PPM. Special gas sensor configurations are available for either duct insertion or flow cell use. As Q45S Wet H2S Gas Detector systems are often monitoring gas streams with condensing levels of water vapor, provision has been made for eliminating water droplets from the gas sensor that could present a barrier to the diffusion of hydrogen sulfide into the sensor. An optional air-purge system controlled by the gas transmitter will periodically deliver a blast of air across the critical sensor surfaces to remove water droplets. This system ensures a clear gas diffusion path to the sensor and reliable measurements continuously.