A flow parallel wire (FPW) with a center tap is used in a sensor for measuring the time of flow. A heater is placed upstream of the sensor. The upstream and downstream parts of the FPW are combined to a half bridge resulting in a large output peak when a heat pulse passes the FPW. The time between generating the heat pulse and recording the peak maximum is insensitive to the properties of the fluid. © 2011 Published by Elsevier Ltd.
Gerhardy, C., & Schomburg, W. K. (2011). Flow parallel wire - Flow sensor insensitive to fluid properties. In Procedia Engineering (Vol. 25, pp. 1189–1192). https://doi.org/10.1016/j.proeng.2011.12.293