Trial
Compare the resistance between contacts No. 1 and No. 2 of the sensor with that indicated on the graph, at the appropriate temperature. The resistance should be close to the specified value.
Note: Immerse the sensor in cold water and measure the resistance, then add hot water and check the change in resistance.
Attention. The sensor contains a thermistor, which can be damaged by high currents during the testing process. Therefore, only use a tester with an output current within 1 mA in the 20 kΩ range.