Megger DET3 Series – 2 & 3 Terminal Earth Testers for Contractors
Designed for demanding fieldwork, the Megger DET3TC and DET3TD are durable digital testers engineered to deliver precise ground resistance measurements. Built with three-terminal configurations, they accurately measure resistance from 0.01 Ω to 2000 Ω and detect earth voltages up to 100 V, making them ideal for both commercial and field applications.
DET3TC – Advanced Testing with ART Capability
The DET3TC incorporates the innovative Attached Rod Technique (ART), allowing advanced ground testing without interrupting service connections. This powerful feature lets users test grounding systems on-site without the need to disconnect the utility connection—saving time and minimising disruption.
When paired with the optional ICLAMP, the DET3TC can also measure leakage and ground current from 0.5 mA to 19.9 A, offering detailed insights into system performance.
Each unit is packaged with a full testing kit, including test leads, earth stakes, batteries, a calibration certificate, and a durable polypropylene carry case—ready for immediate deployment.
Key Features of the Megger DET3 Series
| Feature | Details |
| User-friendly operation | Large, glove-compatible selector switch |
| Testing methods | Supports both 2-pole and 3-pole earth testing methods |
| Probe verification | Automatic verification of test probe connections |
| Integrated voltmeter | Measures earth voltage |
| Resistance range | 0.01 Ω to 2000 Ω |
| Noise rejection | Handles up to 40 V peak-to-peak |
| Display | Battery level via backlit LCD |
| Durability & safety | IP54, CAT IV 100 V rating |
Model Options: DET3TC vs DET3TD
Megger DET3TC – Full ART Ground Testing
- Enables selective ground testing without disconnecting from utility power
- Supports both 2-pole and 3-pole methods
- Adjustable output voltage: 25 V or 50 V
- Compatible with optional MCC1010 clamp for non-disruptive Fall of Potential testing
- Kit includes: Tester, carry case, earth stakes, and test leads
Megger DET3TD – Straightforward Digital Testing
- Perfect for standard ground and bonding tests
- 2- and 3-pole testing support
- Selectable 25 V or 50 V output
- Designed for users needing reliable electrode testing without ART
- Kit includes: Tester, rugged case, wire and stake set
Compatible Earth Test Kits:
ETK30, ETK50, ETK50C, ETK100, ETK100C
Why Choose ART (Attached Rod Technique)?
Traditional testing methods often require disconnecting the grounding electrode—disrupting systems and adding time. ART testing, exclusive to the DET3TC, allows for in-situ testing by measuring current flow through the electrode using a clamp-on sensor. This technique ensures only the current in the test ground is measured—bypassing parallel paths through the utility.
A built-in processor uses this measurement to calculate ground resistance following the Fall of Potential principle, as defined in IEEE Standard 81.
Benefits of ART Ground Testing:
- No need to disconnect the system
- Saves up to 40% of testing time
- Provides reliable, accurate results even in complex environments
▶ Video: Unboxing The Megger DET3 Terminal Earth Tester
❓ Frequently Asked Questions (FAQ)
Q1: What’s the difference between the DET3TC and DET3TD?
A. The DET3TC includes ART functionality for advanced, non-disruptive ground testing, while the DET3TD is ideal for standard ground testing without ART capabilities.
Q2: Can I use these testers in high-noise environments?
A. Yes, both models reject electrical noise up to 40 V peak-to-peak for accurate results in challenging field conditions.
Q3: What’s included in the test kits?
A. Both models come with a carry case, test leads, earth stakes, and batteries. The DET3TC also supports the optional ICLAMP for current measurement.