Detecting proximity or occurrence of change of phase within a fl

Details Detecting proximity or occurrence of change of phase within a fl Detecting proximity or occurrence of change of phase within a fl

1985-11-25

1988-11-01

Yasich, Daniel M.

Thermal measuring and testing

Transformation point determination

Between gaseous and liquid states

376247, G01N 2508

Patent

active

047814691

ABSTRACT:
For detecting the occurrence or the imminence of a change of phase within a fluid, a predetermined quantity of heat is generated within thermally conducting means in contact with the fluid. The temperature of said means is measured and compared with a reference temperature so selected as to correspond to the apparition of a second phase within said fluid. In particular, effective or imminent apparition of gas bubbles can be detected in a liquid wherein the temperature of the thermally conducting means has a reference temperature close to the temperature of the liquid.

REFERENCES:
patent: 3392570 (1968-07-01), Bonjour et al.
patent: 3487201 (1969-12-01), Beranek
patent: 3564900 (1971-02-01), Andre et al.
patent: 4227411 (1980-10-01), Abramovich
patent: 4399823 (1983-08-01), Donnelly
patent: 4408902 (1983-10-01), Peuker
patent: 4449403 (1984-05-01), McQueen
patent: 4541730 (1985-09-01), Comey et al.

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