Earth Resistance Tester

The Digital Earth Testers UNI-T UT521 / UT522 are professional earth resistance measuring instruments designed for electrical installations, grounding system inspections, lightning protection testing, and preventive maintenance. Supporting both 2-wire and 3-wire earth resistance measurements, these testers deliver reliable accuracy, LCD backlight, Data Hold, and CAT III 600V safety, making them ideal for electricians, engineers, technicians, utilities, and industrial maintenance professionals.

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Key Features

• Professional earth resistance measurement
• Supports 2-wire and 3-wire testing
• Accurate earth resistance measurement
• AC earth voltage measurement
• Large LCD display with backlight
• Data Hold function
• Auto power-off
• Low battery indication
• Double insulation protection
• Manual range selection
• Over-range indication
• Poor contact indication
• CAT III 600V safety rating
• Lightweight portable design
• Carrying case included