PHOTOCOMPENSURATION GAS DENSITY SENSOR Russian patent published in 2019 - IPC G01N9/26 G01B11/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to analysis of materials by determining their density, more specifically to automatic sensors of gas analysis, namely to a photocompensatory sensor of gas density, which comprises a magnetoelectric galvanometer, comprising a frame, placed in the gap of the permanent magnet, and a movable part with a plate and a mirror rigidly fixed thereon, a light beam is directed on mirror from the light source through the condenser and the diaphragm, at that, to the plate surface rigidly fixed on magnetoelectric galvanometer stretching, inlet pneumatic circuit is normally arranged in the form of two nozzles, and in feedback of said sensor there is an electrical differential circuit, which includes sources of voltage and load resistance, recording device milliammeter and differential photoresistor, and said sensor is characterized by that to inlet pneumatic circuit comparative gas circuit is connected, in one branch of which there connected in pneumatic distributor, which pulses the sample gas in a test mode, measuring chamber for test gas, also connected to pneumatic distributor, and micro-manometers measuring gas pressure.

EFFECT: increase sensitivity and increase in gas density readings.

1 cl, 1 dwg