A multimeter, or universal meter, is a measuring instrument for measuring electrical quantities such as voltage, current and resistance. Advanced models can also measure capacitance, inductance, frequency, temperature, diode voltage and transistor current gain. In addition, many multimeters have a connection tester (continuity), which sounds an audible signal when a good connection is made, allowing you to work faster without having to look at the meter.
Modern multimeters are usually digital (DMM) with an LCD display. More expensive models automatically select the correct measuring range or polarity. Some multimeters also have an analogue scale for easier interpretation of changing values. A digital multimeter has a built-in amplifier, giving it a higher input impedance and the ability to accurately measure lower voltages and currents.
Different types of multimeters
Types include portable (handheld) multimeters for on-site use and bench-top models for laboratory use, which often offer higher accuracy, for example for calibration applications. Multimeters can be divided into different categories:
- Analogue multimeters: with needle display
- Automotive multimeters: specially designed for working on vehicles.
- Bench-top multimeters: table-top models, suitable for use in laboratories, education and in the workplace.
- Advanced multimeters: with additional functionalities and a larger measuring range than standard models.
- Graphical multimeter: graphical representation of waveforms.
- Pocket multimeters: very compact models.
- Special multimeters: the highest safety category, logging function or designed for specific applications.
- Standard multimeters: basic functionality.
Comparable
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