Electrical Test
Earth Testing Kits
From quick 2/3-wire checks to full 4-wire and soil resistivity surveys.
ERT-10
Handheld earth resistance tester with large backlit LCD and 3 mA test current for RCD-safe checks.
ERT-40R
Field kit with IP65 case, AFC interference rejection and wide resistance ranges for commissioning & surveys.
ERT-50R
Professional earth tester with selection & double-clamp methods, soil resistivity, earth voltage and ground current.
Quick compare — Earth Testing Kits
Quick Reference
Model Comparison
Connection diagrams — 2 / 3 / 4‑wire
Reference
Connection Diagrams — 2 / 3 / 4-wire
2-wire (simplified)
Use when a quick check is sufficient and conditions are suitable.
3-wire (precise)
Standard method for commissioning and verification.
4-wire (guarded)
Use guarding where surface leakage affects measurements.
How to choose an Earth Testing Kit
For quick maintenance checks, a 2/3-wire tester with a large display and low test current covers the essentials.
For commissioning, surveys, or complex bonded systems, step up to 2/3/4-wire models with soil resistivity, and—where needed—selection/double-clamp methods, ground-current measurement, memory and software.