The Gasera One GHG greenhouse gas analyser is based on the Gasera One platform combining cantilever-enhanced photoacoustic detection technology with a quantum cascade laser source operating at a mid-IR fundamental spectral absorption line of the target greenhouse gases: methane (CH4) and nitrous oxide (N2O). This provides ppb sensitivity to measure ambient background levels of methane and nitrous oxide. It also gives an exceptionally high level of stability with a recommended recalibration period of 12 months. The analyser can measure CH4 and N2O simultaneously, its short optical path provides a wide dynamic range and only a few mL of sample are required.