FIELD: physics; measurement.
SUBSTANCE: electrochemical gas analyser consists of electrochemical cell (ECC) with two electrodes and measuring converter that contains amplifier and thermal compensation circuit. One of thermal compensation circuit poles is connected to the first ECC electrode, the other one - to amplifier outlet. The first ECC electrode is also connected with inverting inlet of amplifier and with output terminal. Additionally, voltage divider with two resistors is introduced between the second ECC electrode and negative inlet of amplifier supply, at that the first resistor with its one pole is connected to the second resistor and non-inverting inlet of amplifier. Additionally miniature supply element - chemical current source (CCS) is introduced, which is connected to inlets of amplifier supply, and the second ECC electrode is connected to positive inlet. Outlet of amplifier is connected to the second output terminal.
EFFECT: simplification of electric principal circuit, and accordingly, reduction of gas analyser dimensions, makes it possible to reduce consumed power, which results in increase of its service life.
2 cl, 3 dwg
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