Gas sensors detects various atmospheric gases, toxic and nontoxic gases. The chemical content of the gas is also part of the detection process and hence are also known as chemical sensors. Different type of technologies are used to analyze the gas content. All such sensors are also known as gas detectors and hence the terms are used interchangeably and should not be confused with.
Various gas sensors are CO2 sensor, CO sensor, O2 sensor, Hydrogen sensor, Methane (CH4) sensor, LPG (Liquid Petroleum Gas) sensor, Gas leakage sensor, Nitrogen Dioxide (NO2), Hydrogen Sulfide (H2S), Ammonia, Sulfur Dioxide (SO2), Ozone (O3) sensor, Natural Gas (CNG) sensor, Argon detector etc.
Different models of portable and fixed type of gas detectors are available for different purposes. Portable sensors are used for industrial and hazardous environments where individuals need to carry them and check the gas levels before entering confined areas, hazardous areas etc. The portable ones are also known as gas detection meters.