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Megger DET3TD 3-Terminal Digital Ground Resistance Tester, 0.01 to 2000 2%± 3d Resistance Range, 0-100 V Ground Voltage Range

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Product Specifications
Mfr Part #
System of Measurement
Item Weight
2.2 pounds
Number of Items
Overall Height
3-3/16  inches
Overall Length
8  inches
Overall Width
5-11/16  inches
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Key Features

  • Ground resistance meter for measuring ground resistance, voltage, and current for digital ground and bond testing
  • Digital meter with autoranging measurement and user-selectable 25 or 50V test voltage
  • Noise rejection up to 40V peak to peak for accurate testing in noisy environments
  • Measures voltage from 0 to 100V, ground current from 0.5mA to 19.9A, and ground resistance from 0.01 to 2000 ohms
  • Safety rated to IEC/EN 61010-1 Category IV 100V and IP rated to IP54

Package Details

Shipping Weight: 5.85 pounds
Package Size: 12.6 x 11 x 4.3 inches

Product Description

The Megger DET3 digital ground resistance meter measures ground resistance, voltage, and current for digital ground and bond testing to increase the safety and performance of electrical systems. The unit measures digitally, is autoranging, and has user-selectable 25 or 50V test voltages. The noise rejection feature filters out noise up to 40V peak to peak for more accurate testing in high-noise environments. The meter measures voltage from 0 to 100V, ground current from 0.5mA to 19.9A, and ground resistance from 0.01 to 2000 ohms. The LCD display indicates test results and the status of the batteries for ease of use. The tester is safety rated to European Standards (IEC/EN) 61010-1, Category IV 100V. It is also Ingress Protection 54 (IP54)-rated for protection against dust and splashing water. The DET3 is commonly used by electricians and electrical contractors to help ensure the safety of electrical systems.


Power supply (8) AA batteries
Voltage range 0 to 100V
Ground current range 0.5mA to 19.9A
Ground resistance range 0.01 to 2000 ohms
Weight (including batteries) 1kg/2.2 lb.
Safety standards met International Electrotechnical Commission (IEC)/European Standards (EN) 61010-1 Cat IV 100V
Ingress protection (IP) standard met IP54, for protection against dust and splashing water
Dimensions 203 x 148 x 78mm/8 x 5.7 x 3.2 inches (H x W x D)

H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Electrical test meters report electrical circuit properties, such as voltage, resistance, capacitance, and continuity. Available in handheld or benchtop form, they detect electrical problems in equipment, wiring, and power supplies. A variety of probes, clamps, and leads can be used to connect the meter to a circuit or device. Single-function meters, such as battery testers and voltage testers, measure one property of a circuit, and multimeters measure multiple properties. Electrical test meters display information either in analog form using a needle that moves on a calibrated scale, or in digital form using digits or a graphic representation on an LCD screen. Meters have electrical properties that are to be measured and the anticipated range of results, and should have a rating that is higher than the maximum value of the anticipated range. An electrical test meter has multiple settings corresponding to potential ranges of values for the properties it can measure. A manual ranging meter requires the operator to scroll through a list of settings until the correct range is reached. An autoranging meter cycles through range settings automatically until it reaches the correct range.

Megger manufactures equipment for cable fault locating, protective relay testing, telecommunications and data integrity, and power quality testing under multiple brand names, among them Megger, Biddle, States, and AVO. The company, founded in 1889, is headquartered in Dover, England, and meets International Organization for Standardization (ISO) 9001:2008 standards.

What’s in the Box?
  • DET3 3-Terminal Digital Ground Tester
  • Replacement 3-wire lead set
  • (2) Ground test stakes
  • Hard carry case
  • (8) AA batteries
  • Instructions

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