Megger DET24C Clamp On Tester

The Megger DET24C Clamp On Earth Tester is a portable, high-precision instrument designed for fast and accurate measurement of earth/ground resistance without the need to disconnect the earth system. Ideal for utility, industrial, and commercial applications, it allows technicians to verify grounding systems efficiently, ensuring safety and compliance with international standards.

Featuring a clamp-on design, the DET24C eliminates the need for auxiliary rods, making it perfect for testing earth electrodes, ground loops, and conductor bonding in live systems. It offers multiple test modes, including AC and DC earth testing, and can measure resistance from a few milliohms up to hundreds of ohms with high accuracy.

Equipped with a backlit digital display, data logging, and intuitive interface, the DET24C simplifies complex testing procedures and provides reliable results even in challenging environments. Lightweight and durable, it is the ultimate solution for maintenance engineers, electricians, and safety inspectors who require fast, non-intrusive, and dependable earth resistance measurements.

Key Features

Clamp-On Design – Measures earth resistance without disconnecting the ground system.
Wide Measurement Range – Accurate resistance measurement from a few milliohms to hundreds of ohms.
Multiple Test Modes – AC and DC earth resistance measurement for different applications.
High Accuracy – Reliable readings even in noisy or high-current environments.
Backlit Digital Display – Clear, easy-to-read results in all lighting conditions.
Data Logging & Storage – Store and recall measurement results for later analysis.
Portable & Durable – Lightweight, rugged design ideal for field and industrial use.
Automatic Zeroing & Compensation – Reduces errors caused by induced currents or stray voltages.
Compliance with Standards – Meets international safety and testing standards for earth resistance measurement.

Specifications

Ground / Earth Resistance Measurement

Resistance measurement range: 0.05 Ω – 1500 Ω
Resolution: 0.01 Ω
Accuracy: ±1.5% ±0.05 Ω (low range example)
Measurement frequency: ~1390 Hz
Method: Clamp-on / stakeless (no need to disconnect earth)

Leakage Current Measurement

RMS current range: 0.5 mA – 35 A
Measurement type: True RMS
Suitable for detecting leakage current and unstable grounding conditions

Memory & Communication

Internal storage: up to 2,000 records
Data download: Bluetooth (DET24C only) → compatible with Megger PowerDB / PowerDB Lite
Real-time clock: recorded measurements include date & time

Display & Interface

Digital LCD display with backlight for clear visibility in low-light environments
High/Low alarms and Hold function for easier reading

Other Features

Clamp-on elliptical jaw for cable access up to 37 mm diameter / ground strap up to 50 mm
Auto-ranging & self-calibration
High/Low alarms for rapid detection of abnormal conditions
Auto power-off for battery saving
Supports balance of ground circuits & continuous ground continuity testing

Power & Physical

Power supply: 4 × AA alkaline batteries
Battery life: ~24 hours continuous testing (without backlight)
Material & Form: Compact and lightweight (~985 g), ideal for field portability

Safety & Standards

Safety rating: CAT IV 600 V
Designed according to international standards for electrical test equipment in high-voltage environments

Clamp-On Earth Tester

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