A variety of sample cells for gases liquids and aerosols are available, operating at optical path lengths from less than a millimetre to one kilometre. Many of the cells can be cooled or heated within the range 77K to 473K and some can operate at high pressures up to five atmospheres. Most of the cells are specifically designed to operate with MSF spectrometers, and all optical paths can be evacuated to eliminate spectral interference from atmospheric species. However, two larger diameter cooled cells have been built to operate with other instruments and have been used for instrument validation. All cells can be fitted with calibrated temperature, pressure and humidity sensors that are automatically logged during measurements.
