Honeywell Analytics Limited

Steven Gerard Forrest

A portable detector is described for monitoring a gas in an atmosphere. The detector comprises a housing, at least one gas sensor carried by the housing, and electrical connectors carried by the housing for establishing electrical connections to a calibration apparatus and a microprocessor carried by the housing. The microprocessor controls the calibration apparatus via signals provided to microprocessor through the connectors to initiate the supply of calibration gas to the detector at a predetermined rate.

Gas sensor calibration system

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

Gas sensor calibration method

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

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Poole, United Kingdom

Steven Gerard Forrest