Patent ID: 8193502
Filing Date: 2012-06-05
Classification: G01N

Abstract:
1. An optical absorption gas sensor comprising a body having an internal wall which defines a chamber, at least one aperture in the body through which a gas sample can enter the chamber, a light source, at least one reflector, a detector assembly which extends into the chamber and has a first side and an opposite second side and which includes a detector on one face of the detector assembly which measures light which is incident at least a range of angles on at least a part of a first surface of the detector assembly on the first side of the detector assembly, wherein the light source is located within the chamber on an opposite face of the detector assembly on the second side of the detector assembly, the gas sensor being configured such that light from the light source passes through the gas sample and is reflected around the detector assembly, by the at least one reflector, onto the detector.