Specac has introduced a new range of fixed, long pathlength gas cells, Atomos, for measuring the infrared spectra of gases and vapours. They are designed for use over a wide range of temperatures and pressures, and are suitable for operation in all modern FT-IR spectrometers. The cells are available, as standard, with a metal body for operation at ambient temperatures and pressures ranging from vacuum to 125 psi. Models are available covering pathlengths from 2.5 m to 20 m.