Hydrogen Sulphide is an extremely toxic gas. It is toxic even at a 10 ppm value and practically lethal at a value of 800 ppm. It can corrode through your costly lab equipment and if its value exceeds a threshold of 4.3% in air, it will turn flammable.
H2S is prevent abundantly in natural gas, fossil fuels and is generated as a byproduct of almost all biological processes. H2S is also directly responsible for acid rain. It also corrodes the pipelines that carry gases and fuels endangering the lives of hundreds of people. That is why their levels must be constantly controlled.
H2S analyzer is a device that is used to control the levels of Hydrogen Sulphide in air. This device is usually built around a Ultra-Violet spectrophotometer. This device draws samples of air/liquid continuously and monitors the absorbance levels of the gas to detect H2S levels. The output of this device is the present, real-time H2S concentration.
The working of this device is complicated yet is based on a simple principle. Once the sample is drawn in either liquid or gaseous format, fiber optics is then used to transmit the signals to and from the sample cell of flow.
Generally, such analyzers are additionally used to detect the presence of other gases as well. For instance the general H2S analyzer also acts as a calorific value analyzer, CO2 analyzer and so on. The measurement values of the analyzer can be set either in values of ppm or in percentage values.
The typical response time of a modern analyzer ranges between 0-10 seconds. They are incredibly quick and as soon as you place the sample on to them, they will get to work and produce you the concentration of H2S on the sample either in a percentage value or in terms of ppm.
False positives and interferences is also a big threat when it comes to analyzers but modern analyzers are sophisticated enough to identify and segregate false positives.
A solid state build of the analyzer is always preferable. If the analyzer is in solid state, it means there will be reduced number of movable parts increasing the efficiency of the device. Also, unlike other analyzers, Hydrogen Sulphide analyzers can be installed outdoors since they are ultra safe and do not require any consumables or reagents.
The light source used in H2S analyzers is made of xenon and that means increased life and less maintenance.
To know more about H2S analyzer or calorific value analyzer, please check our website.
This article is copyright free.