Flowmeter having a thermoresistant element and its calibration process

摘要

The flowmeter comprises a variable gain amplifier (1) whose input is connected to ground through a resistor (4) of constant resistance of low value relative to the input impedance of the amplifier, the thermoresistant element (3) being connected between the input and the output of the variable gain amplifier (1) and means (2) being provided for adjusting the value of the gain of the amplifier in such manner as to obtain the desired value of the current in the thermoresistant element (3) corresponding to the constant temperature it is desired to obtain.