Infrared gas analyzer

Air with much of a certain gas will absorb more of a certain frequency, allowing the sensor to report a high concentration of the corresponding molecule.

Earlier analyzers were held back by the fact that a particular gas also has lower absorption bands in the infrared.

For instance, if the analyzer is to measure carbon monoxide and dioxide, the chambers must contain a certain amount of these gases.

By optically filtering the energy, the radiation spectrum is limited to the absorption band of the gas being measured.

Many analyzers are wall-mounted devices intended for long-term, unattended gas monitoring.

Fast response high-precision analyzers are widely used to measure gas emissions and ecosystem fluxes using eddy covariance method when used together with fast-response sonic anemometer.