FIELD: electrical engineering. SUBSTANCE: device gas power generator, measuring circuit set up of series-connected optocoupler light emitter, adjusting and limiting resistors; voltage supply is, essentially, parametric stabilizer. Connected to each phase lead of supply mains are diodes to form three-phase rectifier bridge whose cathodes are interconnected at common point; one lead of measuring circuit is connected to mentioned common point and its other lead, to ground. Optocoupler photodetector is connected in series with final element to output of DC voltage supply. EFFECT: simplified design, improved reliability and sensitivity of device. 4 cl, 2 dwg
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