Definition - What does Gas Detector mean?
Gas detectors are electronic devices that transmit warning signals by sounding alarms or flashing lights when it detects above normal levels of poisonous gas vapors. While undertaking work in underground pipelines like sewers, there is danger of inhaling poisonous gasses which can be harmful or even fatal. Gas detectors send out alarms that helps prevent such incidences by allowing crews to remove themselves from the danger zone.
Trenchlesspedia explains Gas Detector
Some of the poisonous gasses in sewer lines are H2S – Hydrogen Sulphide, CO – Carbon Monoxide, and CH4 – Methane. These gasses are harmful if inhaled and are difficult to detect without detectors. For example, H2S gas can be detected at low concentrations due to its distinct rotten egg odor, but at high concentrations (above 100 ppm), the gas can numb the sense of smell by olfactory adaptation. A 100 ppm concentration of H2S is harmful for health, and above 1000 ppm can cause unconsciousness. Gas detectors can help prevent such human error by using its detector system to warn of dangerous gas levels in the drain or sewer.