DIFFERENTIAL PRESSURE-TYPE MASS FLOW METER WITH DOUBLE NOZZLES

摘要

PURPOSE: An orifice mass flowmeter using a dual nozzle is provided to measure a flow rate of not only low pressure fluids but also high pressure fluids regardless of a pressure range of the fluid. CONSTITUTION: An orifice mass flowmeter using a dual nozzle comprises a measurement part(10) and a calculation part(20). The calculation part calculates a mass flow of a fluid by using a measurement value measured by the measurement part. The measurement part is composed of a pipe body(11) and first and second nozzles(12,13), a temperature sensor(15), and first and second pressure sensors(16,17). The pipe body is connected to a pipeline. The first and second nozzles are installed in the inside of the pipe body by being spaced. The temperature sensor is installed in a front end of the first nozzle, thereby measuring temperature of the fluid inside of the pipe body. The first and second pressure sensors are respectively installed in between the first and second nozzles and the front end of the first nozzle, thereby measuring the pressure of the fluid.