UNI-T UT521 Earth Tester

UNI-T UT521 Earth Tester | Digital Ground Resistance Meter

Your Professional Earth Tester for Electrical Safety in Sri Lanka

The UNI-T UT521 is a professional-grade digital earth tester, expertly engineered for precise and reliable ground resistance measurement. This powerful earth resistance meter is ideal for electricians, technicians, and engineers across Sri Lanka's power, industrial, and telecommunications sectors. Whether you need an accurate earth pit tester for system verification or a versatile grounding tester for safety audits, the UT521 delivers exceptional performance and value.

Designed as a portable and handheld unit, this digital earth megger simplifies on-site inspections. It excels at tasks like checking earth electrode resistance, verifying electrical system grounding, and ensuring safety compliance. Its advanced features and user-friendly design make it the go-to earth tester meter for accurate electrical ground testing in any environment.

Key Features of this Digital Earth Tester

Precise 3-Wire and Simple 2-Wire Testing

Performs both precise 3-wire (Fall-of-Potential) tests for comprehensive analysis and quick 2-wire tests for continuity checks.

Wide Earth Resistance & Voltage Measurement

Measures earth resistance across three ranges (0-20Ω, 0-200Ω, 0-2000Ω) and AC earth voltage up to 200V with high precision.

On-Board Data Storage and Hold

The internal memory stores up to 20 sets of data, while the Data Hold function freezes readings on screen for easy recording.

User-Friendly Interface with Full Icon Display

A large, clear LCD with backlight and full icon display ensures readings from the earth ground tester are visible even in low light.

Designed for Field Safety

Features double insulation protection, over-range display ("OL"), and a poor contact indicator ("...Ω") to ensure safe and accurate operation.

Auto Power-Off for Extended Battery Life

The device automatically powers off after approximately 10 minutes of inactivity to conserve battery, with a low battery indicator for convenience.

CE and UKCA Certified

This electrical ground tester meets international safety and performance standards, ensuring it is a reliable tool for professional use.

Common Applications

This ground resistance tester is an indispensable tool for:

Electrical System Installation & Verification

Perform earth pit testing to ensure new and existing grounding systems in buildings and substations meet safety standards.

Lightning Protection System Audits

Use as an earth electrode resistance tester to verify the effectiveness of lightning rods and grounding arrays.

Industrial & Telecom Maintenance

Regularly check the ground connections of machinery, communication towers, and sensitive electronic equipment to prevent faults.

Safety Compliance & Inspections

Conduct routine checks to ensure compliance with electrical codes and maintain a safe working environment.

Technical Specifications for the Earth Resistance Meter

Product Name

UNI-T UT521 Digital Earth Tester

Earth Resistance (Ω)

0~20Ω (±2%+10); 0~200Ω (±2%+3); 0~2000Ω (±2%+3)

AC Earth Voltage (V)

0~200V (±1%+4) at 50Hz/60Hz

Display Count

2000

Data Storage

20 sets

Key Functions

Manual Range, Data Hold, LCD Backlight, Auto Power Off

Power

6 x 1.5V batteries (LR6)

Dimensions

160mm x 100mm x 70.5mm

What's in the Box?

1 x UNI-T UT521 Digital Earth Tester

3 x Test Leads (Green, Yellow, Red)

2 x Alligator Clips

2 x Auxiliary Earth Spikes

6 x 1.5V Batteries (LR6)

1 x Carrying Bag

1 x English User Manual

Downloads

📄 Download UNI-T UT521 Data Sheet

📄 Download UNI-T UT521 User Manual