Abstract: Apparatus and associated methods relate to generating a temperature measurement signal based upon a weighted average of signals generated by a resistive temperature detector (RTD) and a thermocouple device. The thermocouple device includes first and second thermocouple junctions. The first thermocouple junction is thermally coupled to the RTD, and the second thermocouple junction is thermally isolated from the RTD. The thermocouple is configured to generate a signal indicative of a difference between first and second thermocouple junctions, which is substantially equal to the difference between the RTD and the second thermocouple junction due to the thermal coupling configuration. The RTD generates a signal indicative of a temperature of the RTD. A weighted sum of the first and second signals is indicative of a temperature of the second thermocouple junction, which responds rapidly to temperature fluctuations, due to its having a relatively small thermal mass compared with the RTD.

Abstract: Apparatus and associated methods relate to generating a temperature measurement signal based upon a weighted average of signals generated by a resistive temperature detector (RTD) and a thermocouple device. The thermocouple device includes first and second thermocouple junctions. The first thermocouple junction is thermally coupled to the RTD, and the second thermocouple junction is thermally isolated from the RTD. The thermocouple is configured to generate a signal indicative of a difference between first and second thermocouple junctions, which is substantially equal to the difference between the RTD and the second thermocouple junction due to the thermal coupling configuration. The RTD generates a signal indicative of a temperature of the RTD. A weighted sum of the first and second signals is indicative of a temperature of the second thermocouple junction, which responds rapidly to temperature fluctuations, due to its having a relatively small thermal mass compared with the RTD.

Abstract: A liquid level sensing system including a housing configured to hold a liquid, a first temperature sensor connected to the housing and configured to output a first signal representing a first temperature measured at the first temperature sensor, a second temperature sensor connected to the housing and configured to output a second signal representing a second temperature measured at the second temperature sensor, and a circuit configured to receive the first and second signals as input and to provide an output signal proportional to the time rate of change of the difference between the first signal and the second signal.

Abstract: A liquid level sensing system including a housing configured to hold a liquid, a first temperature sensor connected to the housing and configured to output a first signal representing a first temperature measured at the first temperature sensor, a second temperature sensor connected to the housing and configured to output a second signal representing a second temperature measured at the second temperature sensor, and a circuit configured to receive the first and second signals as input and to provide an output signal proportional to the time rate of change of the difference between the first signal and the second signal.