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Title: Measurement Of Gas Flow Rate Using Heat Pulse
Author: Haeman Choi, Kwangbock Lee, And Kyung - Am Park
Source: 1990 International Symposium on Fluid Flow Measurement
Year Published: 1990
Abstract: Heat pulse was used to measure gas flow rate. Direct current was supplied to the manganin wire which was wound around the stainless steel tube. The stainless steel tube was connected at both ends to vinyl tubes in which thermocouples were installed. The switch, amplifier, compressor, and timer were used to generate heat pulse and to measure the transit time. The transit time was strongly dependent on generated power rate and the pick-up positon. As generated power rate was smaller, the transit time was longer. Also the pick-up position should be close to the heater to get short transit time. The effect of outside insulation of the heater was small due to small size of the heater. Linear range was up to about 1:10 with standard deviation of 0.046. It was expected that this sensor would be one of good flow measurement devices with optimization of pick - up position, power generation rate, and heater material.

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