EX503 Extech Multimeter

The EX503 is a Handheld, 1 kV, 4.5 Digit multimeter from Extech.
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  • Averaging DMM with 10 functions and 0.5% basic accuracy
  • AC/DC Voltage & Current, Resistance, Capacitance, Frequency, Duty Cycle, Diode/Continuity
  • Dual sensitivity frequency functions (electrical/electronic)
  • 1000V input protection on all functions
  • 10A max Current
  • Data hold, Relative, Auto power off
  • 4,000 count large backlit LCD
  • Double molded housing for waterproof protection
  • Complete with double molded test leads, magnetic hanging strap, carrying case and 9V battery


  • Display Counts: 4,000 count
  • Averaging/True RMS: Averaging
  • Basic Accuracy: 0.5%
  • DC/AC Voltage: 0.1mV to 1000VDC, 0.1mV to 1000VAC
  • DC/AC Current: 0.1μA to 10A
  • Resistance: 0.1Ωto 40MΩ
  • Capacitance: 0.01nF to 100μF
  • Frequency (electrical): 5Hz to 1kHz
  • Frequency (electronic): 0.001Hz to 10 MHz
  • Duty Cycle: 0.1 to 99.9%
  • Diode/Continuity: Yes
  • Dimensions: 7.25x3.25x2.25"(184x83x57mm)

The EX503 offers an array of must-have multimeter measurements including capacitance, frequency (dual sensitivity for electrical and electronic applications), diode test and continuity. Other features include Data Hold and Relative Hold, and manual- or auto-ranging modes. The latter automatically adjusts the measurement range based on the detected source such as electrical components and electronic equipment. The meter features 0.5 percent accuracy and a CAT IV-600-volt safety rating, protecting users even on outdoor wiring. Includes EX503 heavy-duty digital multimeter, double-molded test leads, magnetic hanging strap, 9-volt battery, carrying case, and user manual.

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