FNIRSI DMT-99 smart digital multimeter True RMS

The FNIRSI DMT-99 is a digital multimeter with True RMS measurement that covers AC and DC voltage, current, resistance, capacitance, frequency and temperature. The meter detects the measured quantity automatically and selects the matching range, so no rotary switch is needed. Its 2.4-inch colour TFT display with HD resolution keeps readings easy to read in low light and from an angle.

The True RMS function gives the true effective value of AC voltage, including on distorted waveforms such as those produced by PWM controllers, switch-mode power supplies and inverters. The non-contact NCV detection and the live and neutral identification with a single probe let you check whether a cable is energised before you start work.

The 1500 mAh lithium battery runs for up to 10 hours according to the manufacturer and charges via USB-C. Further functions include a temperature range from -55 °C to 1300 °C, a diode test, a continuity check with audible signal, data logging and a hold function for the display.