What is a potentiometer meter?

A potentiometer meter is an instrument used to measure the voltage of an electrical circuit by comparing it to a known reference voltage. It operates on the principle of a variable resistor, allowing the user to adjust the resistance to balance the circuit and determine the unknown voltage. Potentiometers are commonly used in laboratory settings and for calibrating instruments due to their accuracy and precision. They can also serve in applications such as volume controls and sensor adjustments in electronic devices.