Megger DET3TD Digital Earth Resistance Tester

The Megger DET3TD Digital Earth Resistance Tester is the ideal field instrument for quick, reliable, and safe verification of earthing systems.

Designed for electrical engineers, MEP technicians, industrial maintenance teams, and field service professionals, the DET3TD provides both ground resistance and bond testing with simple one-button operation, even in harsh outdoor conditions.

With selectable 25 V or 50 V output, a large clear LCD display, and automatic spike connection validation, it ensures accurate results without complexity.

Rated IP54, supplied with a full calibration certificate, and housed in a tough polypropylene case — this tester is built for years of dependable field use.

 Key Features

 2- and 3-point testing capability
 Selectable 25 V or 50 V test voltage
 IP54 rated for outdoor use
 Measures 0.01 Ω up to 2000 Ω
 Earth voltage measurement up to 100 V
 Rejects electrical noise up to 40 V peak-to-peak
 Large, easy-to-read LCD display
 Simple one-button test operation
Automatic P & C spike connection check
 Calibration certificate included
 Complete kit with leads, stakes, batteries & rugged carry case
 Compatible with optional earth testing clamp (ART method)

 Applications

Electrical earthing verification

Preventive maintenance of power distribution systems

Data centers & industrial facilities

Construction site grounding validation

Utility grounding audits

Generator & transformer earthing checks

Lightning protection system maintenance