| 摘要 |
Electric circuit for determining the rate of flow of air for the combustion process of a gas-fired water heater, having two temperature sensor resistors connected to an electrical operating voltage, of which one is heated and both are exposed to the medium. Both are wired to series resistors, and the series resistor (50) for the heated temperature sensor resistor (16) is dimensioned such that the power loss (pe1) of the temperature sensor resistor (16) is the same at the upper and lower temperature limits (T1, T2) of the fluid medium. <IMAGE>
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