ELECTRON GAS SEPARATOR Russian patent published in 1999 - IPC

FIELD: analytical chemistry, proximate analysis of harmful ingredients of gas atmosphere, operational test of emergency emissions or air safety of working zones. SUBSTANCE: sensitive element of proposed separator is manufactured in the form of oxide semiconductor film placed on one side of dielectric substrate and heated resistive layer put on its other side. It is made in the form of set of solitary detectors of nomenclature of separated gases. Operational amplifier with differential bridge circuit in its input circuit has standard and measurement elements in adjacent arms of bridge. Measurement path of separator includes a number of identical amplification stages placed in series and switched over to each type of gas in step. EFFECT: enhanced selectivity by way of synthesis of narrow bandwidth and expanded functional capabilities of separator. 4 dwg, 1 tbl