Toxic gas poisoning is a huge cause of death in industry, and in some applications even more so that those killed from explosions. Toxic gases are poisonous and depending on the concentration can be hazardous to health, or even fatal.
There’s varying factors in determining how hazardous a gas is. Some gases smell, others don’t. The concentration of gas also varies. This is why each gas must be considered as individual as the hazards and regulations vary and so does the type of sensor required.
Toxic gases can be inhaled, absorbed through skin or ingested by workers and the total time of exposure, plus the concentration must be measured. This is applicable even with low concentrations of gas.
Workplace Exposure Limits
Workplace exposure limits (WEL) concerns the industrial health of employees and their exposure to hazardous conditions of gases and dust. It also takes in to consideration other levels in the workplace such as noise.
Sampling WELs would have to be carried out as close to the breathing zone as possible. This makes for a true, representative sample of the contamination breathed in by the worker. Carrying out such checks provides information on the conditions in the atmosphere. Action would then be taken in order to comply with industry regulations and safety requirements.
Please note, it’s important to take into account the toxicity of any gases monitored.