Fluke 23 Specs


The Fluke 23 is a small, handheld, digital multimeter most often used by electricians, electronic engineers and hobbyists. It makes an array of basic measurements, including voltage, current and resistance, as well as tools to check diodes and the continuity of connected circuits. Fluke built the 23 for handheld use, with no wires other than its leads, thanks to its replaceable, standard 9-volt battery.

Voltage Testing

  • The Fluke 23 measures AC and DC voltages, displaying results on a four-digit, digital display and a 31-segment bar graph. With a .3 percent margin of error for accuracy, it can measure signals as small as 320 millivolts as well as in ranges of 3.2, 32 or 320 volts DC. It can track signals as large as 1,000 volts DC with a .4 percent margin of error. With AC signals of between 45 and 1,000 hertz, it achieves a margin of error of 2 percent with signals in the 3.2, 32, 320 or 1,000 volt ranges.

Current Testing

  • The Fluke 23's current tester supports DC and AC signals. With AC signals, it achieves a margin of error of 2.5 percent while measuring currents in the 32 milliamp, 320 milliamp or 10 amp ranges, with the ability to measure 20-amp signals for a short period of time. The Fluke 23's accuracy is even better with DC signals; its readings have a margin of error of 1.5 percent over the same ranges.

Resistance Testing

  • With a 0.5 percent margin of error, the Fluke 23 measures resistances in the 320, 3,200, 32,000, 320,000 and 3.2 million ohm bands. When measuring in a range up to 32 megaohms, its accuracy drops; the margin of error is 3 percent.


  • The Fluke 23 is a small tester, measuring 1.5 inches tall, 3.1 to 3.5 inches wide and 7.49 inches long. It weighs 12.9 oz. and takes one 9-volt battery. It operates at altitudes as high as 6,562 feet and in temperatures as low as 32 and as high as 122 degrees Fahrenheit.

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