Megger DET4TD2 Four-Terminal Earth/Ground Resistance Testers
The DET4TD2 is a rugged, battery‑powered ground‑resistance tester capable of 2‑, 3‑ and 4‑terminal (fall‑of‑potential) measurements. It’s designed for field use with a tough IP54‑rated casing and provides reliable readings from 0.01 Ω up to 20 kΩ, making it suitable for grounding systems in industrial, utility and commercial environments.
Description
Built for professionals working on earth/grounding systems, the DET4TD2 comes as a complete kit including test leads, earth stakes, adaptors and calibration certificate in a rugged carry case. It supports multiple test configurations—2‑point (unused stake method), 3‑point and full 4‑point fall‑of‑potential testing without requiring shorting links, making setup simpler in challenging field conditions. The unit offers selectable test voltages (±25 V or ±50 V) to comply with relevant standards and works across noisy environments by rejecting noise up to 40 V peak‑to‑peak. It also includes automatic checks for the condition/connection of the P‑spike and C‑spike, and provides ground voltage measurement up to 100 V to identify live or stray current conditions. With straightforward controls—large rotary selector and one‑button “Test” operation—the instrument is easy to operate even with gloves. For battery power, it uses eight AA (dry‑cell) batteries, and a status bar‑graph on the LCD shows remaining charge. Safety‑wise it’s rated to CAT IV 100 V between terminal pairs (when proper test lead set used) and compliant with applicable standards for earth‑resistance testing.
Features
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Supports 2‑, 3‑ and 4‑terminal earth/ground resistance tests without the need for external shorting links.
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Resistance measurement range from 0.01 Ω to 20 kΩ, enabling both low‑resistance and higher‑resistance soil/ground network testing.
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Selectable output voltage of ±25 V or ±50 V test voltage, useful for compliance with standards and adaptation to different soil conditions.
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Noise‑rejection capability up to 40 V peak‑to‑peak, allowing accurate measurements in electrically noisy or high‑interference environments.
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IP54 rated housing (splash/dust resistant) and rugged carry case make it suitable for outdoor and industrial field work.
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Automated spike/connection verification (P‑spike and C‑spike), ground‑voltage measurement (up to 100 V) and user‑friendly interface with large selector switch and one‑button test initiation.
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Powered by standard AA batteries (8 × AA) for convenience in remote site testing; battery status shown on the display.
Includes
- Megger DET4TD2 Earth Tester
- Hard Carry Case
- Stake and Wire Kit (15m, 10m and 3m)
- Right Angle Terminal Adaptors (to connect bare wires to terminals)
- Calibration Certificate
- Batteries
