Megger DET3TC Earth Resistance Tester

The Megger DET3TC Earth Resistance Tester is a rugged, reliable field instrument designed for fast and accurate ground resistance testing — without the need to disconnect the earthing system.

Ideal for electrical contractors, industrial technicians, power utilities, and maintenance teams, the DET3TC supports 2-point, 3-point, and ART ground rod testing, making it one of the most versatile instruments in its class.

Engineered for outdoor use, the tester is IP54 rated, features a large dial selector switch that can be easily operated while wearing gloves, and eliminates the hassle of shorting links during 2-pole testing. The instrument also includes built-in warning indicators to prevent invalid measurements.

Delivered as a complete kit with leads, stakes, batteries, and a calibration certificate inside a heavy-duty polypropylene carry case — you’re ready to test right out of the box.

 Key Features

 2- and 3-point ground resistance testing
 ART (Attached Rod Technique) testing capability
 Selectable 25 V or 50 V output voltage
 IP54 rated for harsh outdoor conditions
 No shorting links required for 2-pole testing
 Warning indicators prevent invalid measurements
 Large rotary selector switch — even with gloves
 Easy one-button test operation
 Includes calibration test certificate
 Complete kit — leads, stakes, batteries, hard case
 Optional Earth Test Clamp available (ART method)

 Applications

Electrical grounding verification

Utility and substation earthing tests

Lightning protection grounding checks

Data center and industrial facility grounding

Construction site earthing compliance

Generator & transformer ground grid validation

Telecom grounding audits