A multimeter is a small electronic instrument used to measure the voltage, current and resistance of electrical circuits and systems. It is often used in measuring the electricity in a circuit. As with any electrical testing equipment, it can be tough to know how to use it properly. If you need help getting started with your multimeter, this article will teach you everything you will ever need to know about it.

In this article, I’ll be explaining how to test the temperature in the wires of a thermopile using a multimeter.

What is a thermopile?

A thermopile is used to measure the temperature in a wire or cable. It consists of two wires, one attached to the positive side of an electricity source and another attached to the negative side. The two wires are then joined together by a resistor.

If you want to determine the temperature in a wire, connect one wire of your thermopile to an electrical terminal and connect the other end of the thermopile to your multimeter’s input terminals. Then turn on your electricity and watch how the thermopile voltage low on water heater changes across the resistors.

Testing a thermopile

Testing a thermopile can be tricky and requires some electrical engineering knowledge. To test the temperature, you have to connect the red wire of your multimeter to the negative terminal (grounded) of your thermopile. The black wire should be connected to the thermopile’s positive terminal (live).

Turn on your multimeter and place it in ohms mode to test for temperature. Connect the two probes by touching them as close as possible without physically connecting them. If electricity passes through the meter, how much resistance there is between each probe. With that said, you’ll only see an infinite reading on your multimeter if there’s no resistance at all between the two probes. If you see anything other than an infinite reading, then there’s resistance on either side of the meter– meaning one side has more heat than the other. This means that one side has more voltage applied to it than the other, and so it needs more power to get through that voltage difference. For electricity to flow through both sides equally, they need to be at precisely the same temperature– which we’re going to find out later in this article!

Testing the resistance of a thermopile

To test the resistance of a thermopile, you need to measure the voltage across it. To do this, you will need to connect a multimeter probe to the positive and negative terminals on the device. When measuring the voltage across a thermopile, remember that there is always an offset voltage, which can be considered when calculating your final result.

The equation for calculating the resistance of a thermopile is:

R = V/I

Where R is the resistance in Ohms (Ω), V is the Voltage in Volts (V), and I is currently measured in Amperes (A).

Testing the temperature in wires using a multimeter.

To test the temperature in the wires of a thermopile using a multimeter, follow these steps:

  1. Set your multimeter to the lowest possible scale.
  2. Insert one probe into one wire and set it to the highest range (usually 250K).
  3. Insert another probe into the other wire and set it to the lowest range (usually 0K).
  4. Power on the thermometer and get ready for some readings!
  5. Multilingual Setting: If you’re not sure which language your multimeter is set on, check from your manual or use this quick guide on how to change this feature
  6. Multifunctional Settings: Use these settings for all your applications
  7. The last step is to save your settings! Your settings will be saved in your unit’s memory so you can easily access them whenever you need to
  8. Test completed! You have successfully tested the temperature in a thermopile with a multimeter


There are many uses for thermopiles, but the most common is to measure the temperature of wires. For example, when you place your hand on a small ceramic heater, the temperature can be measured by using a thermopile. If you’re looking to test your thermopile with a multimeter, this guide provides you with the step-by-step instructions and necessary tools to do so.