Apparatus for the measurement of the mass of a flowing medium

Details Apparatus for the measurement of the mass of a flowing medium Apparatus for the measurement of the mass of a flowing medium

1979-11-20

1981-10-13

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

042941148

ABSTRACT:
An apparatus for measuring the mass of a flowing medium which utilizes a temperature--dependent resistor disposed in the flow of the medium. The temperature-- dependent resistor includes a carrier and a resistor film disposed on the carrier. The temperature and/or resistance of the resistor film is governed by the mass of the flowing medium and serves as the basis for the generation of a manipulated variable which is a standard for the mass of the flowing medium. The apparatus also utilizes a preceding body aligned longitudinally with the carrier directly upstream of the carrier in the direction of the flow of the medium. The preceding body has a length such that a particular boundary layer state prevails about the temperature-dependent resistor and the heat-transfer coefficient of the resistor film is influenced in accordance with the mass of the flowing medium.

REFERENCES:
patent: 3677085 (1972-07-01), Hayakaw
patent: 3900819 (1975-08-01), Djorup
patent: 4214478 (1980-07-01), Lauterbach

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