Gas sensor calibration system

摘要: An apparatus is described for calibrating at least one sensor within a gas detector (22), which has inlet in fluid communication with the or each sensor, comprising housing (10) that contains: a) surface (24) abutting against (22); b) holder (14) holding (22) respect to such manner region of containing abuts form sealed interface between and c) connector connecting source pressurised calibration (12) apparatus, d) conduit (32) delivering from (34) housing, e) electrical connections (40) forming held holder, flow controller (34, 36) providing predetermined level interface, including an electrically-operated valve (36) being controllable initiating terminating through by means signals received via (40). The whole controlled he not apparatus.