Can thermistors be used in water?

NTC Thermistors are ideal for measuring temperature in liquids such as water and gas because of their long-term stability and reliability. They also provide extreme accuracy compared to a thermocouple, making them the perfect solution for measuring small variations in lake temperature.

What does a thermistor measure?

The main use of a thermistor is to measure the temperature of a device. In a temperature controlled system, the thermistor is a small but important piece of a larger system. A temperature controller monitors the temperature of the thermistor.

What is the working principle of a thermistor?

The working principle of a thermistor is that its resistance is dependent on its temperature. We can measure the resistance of a thermistor using an ohmmeter.

How do you read a thermistor temperature?

Thermistor Response to Temperature As with any resistor, you can use the ohmmeter setting on your multimeter to measure thermistor resistance. The resistance value displayed on your multimeter should correspond to the ambient temperature near the thermistor. The resistance will change in response to temperature change.

What should the thermistor reading be in a cup of water?

With the thermistor in a cup of water, the ohm reading should be around 16.6 K ohms or 16,600 ohms +/-5%. Next unplug the refrigerator and locate the main board on the back of the refrigerator. There is a plug marked J1 on the board and that is where the thermistors are connected. There are 9 pins on that J1 plug.

Can you put the thermistor in a cup of ice?

First, locate the thermistor (see pictures below), once you locate the thermistor, place it into a cup of ice water (more ice than water). You should be able to sit the cup on a shelf and place the thermistor in the cup (make sure it is in the ice good).

What should the resistance of a GE thermistor be?

This should bring the thermistor to 32 degrees. Using your ohmmeter, check resistance across the thermistor with it still in the ice water. It should read around 16.6 K ohms or 16,600 ohms +/-5%. If you don’t own an ohmmeter or are unsure how to properly use it, replace the thermistors if you suspect they are bad.

How to test a thermistor-learning about electronics?

If the NTC thermistor follows this behavior, then it is good. If it does not, it is faulty and should be discarded. Testing a PTC thermistor follows all the same steps as a NTC thermistor. First check, with an ohmmeter, the thermistor without any heat applied.