Measuring and testing – Volume or rate of flow – Thermal type
Patent
1979-06-08
1981-03-17
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
G01F 168
Patent
active
042559685
ABSTRACT:
An all solid state transducer and electronic system is disclosed for measuring flow through the use of a small, low temperature heater. The heater transmits an amount of heat to the flowing medium dependent on flow rate. A first temperature sensor is located near the heater and within its thermal influence. A second temperature sensor is thermally isolated from the heater. The heater and first sensor are located relative to each other such that the difference between the temperature sensors is proportional to the logarithm of the flow rate.
REFERENCES:
patent: 2729976 (1956-01-01), Laub
patent: 2953022 (1960-09-01), Laub
patent: 3246515 (1966-04-01), Martino
patent: 3800592 (1974-04-01), Jones, Jr.
patent: 3931736 (1976-01-01), Olmstead
patent: 4028689 (1977-06-01), Schopp
Tobin "Development of a Clamp-On Flowmeter", Proceedings of 18th Intern. ISA Aerospace Symposium, vol. 18, 5/1972, pp. 338-340.
Goldstein Herbert
Intek, Inc.
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