A digital multimeter is a device that measures electrical values such as voltage, current, and resistance. In addition to these basic functions, advanced digital multimeters can test diodes and measure capacitance, frequency, and even temperature. The ability to offer multiple measurements with one device makes digital multimeters indispensable in household and professional electrician toolkits.
Unlike analogue multimeters, where a moving needle indicates readings, digital multimeters display measurements on an LCD screen, which provides a precise numerical value. This digital display is easier to read, offers greater accuracy, and has less chance of reading errors compared to the scale and needle system of analog multimeters.
One of the most common use cases of a digital multimeter is to troubleshoot electrical issues within a household. For instance, ensuring a 9V battery is actually delivering 9 volts or testing the continuity of a light switch to confirm it operates correctly.
Now that you’re familiar with a digital multimeter and its uses, let’s take a look at what you need to know before you buy one online.