Viscometric thermometer

Details Viscometric thermometer Viscometric thermometer

1988-01-19

1988-12-13

Yasich, Daniel M.

Thermal measuring and testing

Thermal testing of a nonthermal quantity

Of fluid volume

73 55, 374135, G01N 1100, G01N 2500

Patent

active

047906685

ABSTRACT:
A viscometric thermometer is fabricated with two sensing capillaries connected serially in a common fluid flow circuit. The first capillary is immersed in a reference bath of known constant temperature. Pressure differential across the first capillary is measured and the fluid medium flow rate through the common circuit is determined. The second sensor is positioned in the unknown temperature environment and pressure differential across the second capillary is measured. This second capillary pressure differential is combined with the determined flow rate value to further determine the unknown temperature value.

REFERENCES:
patent: 503337 (1893-08-01), Uehling
patent: 2356607 (1944-08-01), O'Brien
patent: 3082620 (1963-03-01), Brazier
patent: 4478071 (1984-10-01), Lecacheux et al.
patent: 4578990 (1986-04-01), Abbott et al.
patent: 4603979 (1986-08-01), Matilainen et al.
"The Viscometric Thermometer: A Non-Perturbing Instrument for Measuring Temperature in Tissues Under Electromagnetic Radiation" by M. M. Chen, C. A. Cain, K. L. Lam and J. Mullin, published in Journal of Bioengineering, vol. 1, 1977, pp. 547-554.
"Viscometric Temperature Measurement in Electric or Magnetic Fields" by J. Seyed-Yagoobi, J. C. Chato and J. M. Crowley, published in the Review of Scientific Instruments, vol. 55, No. 9, Sep. 1984, pp. 1471-1474.

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