DEVICE FOR GAS VOLUMETRIC FLOW RATE MEASUREMENT Russian patent published in 2018 - IPC G01F25/00 

FIELD: measuring equipment.

SUBSTANCE: device for determination of the volumetric flow rate of the measured gas flow contains a flow label gas pressure regulator, which is executed with an ability to be connected to the flow label gas source input; a thermostat; a flow switch executed with an ability to switch the direction of the measured gas flow; at least two measuring channels, each of made with a possibility of measurement of the volumetric flow rate of the measured gas flow with partially overlapping ranges of flow rate measurement of adjacent channels and containing a flow line, which is made with a possibility of placement in the inner volume of the thermostat with a possibility of transmission of the measured gas flow, as well as of the flow gas label of the specified volume and contains the following components arranged along the flow in the order of mentioning: a gas delay line, the first detector made wih a possibility of flow label gas concentration measurement in the measured gas flow, a measuring volume, the second detector made with a possibility of flow label gas concentration measurement in the measured gas flow; as well as a flow label gas pulse input unit, connected to the gas delay line input; a temperature sensor, executed with an ability to measure temperature in the measured gas flow and connected to the gas delay line output; the first absolute pressure sensor, which is connected to the first detector; the second absolute pressure sensor, which is connected to the second detector. The flow switch is placed in the internal volume of the thermostat, one of the flow switch outputs is connected to the flow measuring line in the junction point of the flow label gas pulse input unit output with the delay line, and the flow label gas pressure regulator output is connected to the input of each flow label gas pulse input unit.

EFFECT: provision of a possibility of measurement of volumetric flow rates of any gases, gas mixtures of arbitrary composition, including gas mixtures with a condensation temperature below the thermostat temperature, in volumetric flow rate determination with a low error.

12 cl, 1 dwg