UNI-T UT278C Series Ground Pile Clamp Earth Resistance Tester

UNI-T UT278C Series Ground Pile Clamp Earth Resistance Tester

The UNI-T UT278C is a high-performance ground pile clamp earth resistance tester purpose-built for testing the grounding resistance of individual earth electrodes and ground piles in multi-electrode earthing systems — all without disconnecting the electrode from the system. Ideal for substations, telecom towers, pylons, and lightning protection networks where safe, fast, and non-intrusive earth resistance measurement is critical.

Key Features

• Earth Resistance Range: 0.01Ω – 2000Ω with high resolution
• AC Leakage Current Measurement: 1mA – 30A for fault and stray current detection
• True RMS: Reliable measurements on distorted waveforms
• Large Clamp Jaw: Wide opening to fit ground piles, rods, and heavy bonding conductors
• Dual LCD Display: Simultaneous resistance and current readings at a glance
• Data Hold, MAX/MIN & REL Mode: Capture and analyse readings on site
• Memory Function: Store and recall measurements for documentation
• Audible & Visual Alarm: Threshold alert for out-of-spec grounding resistance
• Interference Rejection: Advanced filtering for stable readings in high-noise environments
• Auto Power Off: Battery-saving feature for extended field use
• Safety Rating: CAT III 300V

Typical Applications

• Ground pile and earth rod resistance testing at substations and switchyards
• Telecom tower and antenna mast earthing verification
• Lightning protection system grounding compliance checks
• Multi-electrode earthing grid testing without system shutdown
• Preventive maintenance of industrial and utility grounding networks

What's in the Box

• UNI-T UT278C Earth Resistance Tester (main unit)
• Batteries
• Carry case
• User manual

When you need to test individual ground piles within a live earthing network — without taking the system offline — the UNI-T UT278C delivers the accuracy, interference rejection, and ease of use that utility engineers and site safety teams rely on.