Digital multimeter, a device that measures voltage, current, and resistance. A digital multimeter is a very useful tool for electrical and electronic work. Digital multimeters are measuring instruments that can measure quantities such as voltage, current, and resistance. Measured values are shown on a digital display, allowing them to be read easily and directly, even by first-time users. We stock a range of digital multimeters and testers for sale online. Buy your digital multimeter online today.