The UNI-T UT521 is a reliable digital earth resistance tester designed for accurate measurement of earth resistance and earth voltage. It supports both 2-wire and 3-wire testing methods and provides clear readings on a backlit LCD.
- Earth resistance measurement ranges: 0–20Ω, 0–200Ω, 0–2000Ω
- Earth voltage measurement up to 200V AC (50/60Hz)
- High accuracy with a clear LCD and backlight
- Data hold and storage function for up to 20 readings
- Auto power-off and low battery indication
- Double insulation for user safety
- Over-range and poor contact indication
- Includes test leads, auxiliary earth stakes, and a carrying bag
- Powered by 6 × 1.5V AA batteries
- Compact and portable design for field use
