Heat meter and temperature sensor

The utility model discloses a heat meter and a temperature sensor. The temperature sensor comprises an induction housing, a thermal shrinkable sleeve and a conductive member. When the temperature sensor is inserted into a water source for temperature testing, and the water source environment is a cold-heat exchange water source, the conductive part can generate corresponding cold shrinkage and thermal expansion phenomena (the phenomena are called as wriggling phenomena of the conductive part in the heat exchange process) in the process of continuously changing the water temperature. At the moment, the thermal shrinkable sleeve located between the induction shell and the conductive part can be correspondingly changed in the process that the water temperature is continuously changed. When the conductive part is heated to expand, the thermal shrinkable sleeve is heated to shrink; and when the conductive part is shrunk by cold, the thermal shrinkable sleeve keeps the original shrunk stateand does not expand any m