GAS MONITORING SYSTEM FOR DETERMINING A CONCENTRATION OF GAS

摘要

A monitoring system and method for determining a concentration of a gas in an enclosed space includes a plurality of detector units with each detector unit having a thermal conductor detector for providing a signal representative of a thermal differentiation of a transmission of at least a portion of the gas across the thermal conductor detector. A probe units connect the enclosed space to provide the representative portions of the gas at different locations across the enclosed space to the thermal conductor detector. An adjustable flow meter provides a constant flow rate and each thermal conductor detector is maintained at a constant temperature above ambient. A data acquisition unit can format the signals so that a processor unit can provide a simultaneous measurement of the volumetric level of the gas in the enclosed space.