The Uni-T UT521 is a manual ranging digital earth resistance tester that accurately measures ground resistance (0–20Ω / 0–200Ω / 0–2000Ω) and AC earth voltage (0–200V, 50/60Hz). It features a large backlit 2000-count LCD, rotary dial control, and clearly labeled V, E, P, C terminals for easy, reliable operation in all environments. Ideal for electrical inspections and grounding system testing.

Key Features:

Measures earth resistance: 0–20Ω / 0–200Ω / 0–2000Ω
Measures AC earth voltage: 0–200V (50/60Hz)
Accuracy: ±2%rdg ±(1–3)dgt
Data Hold and Memory storage (up to 20 records)
Low battery indicator and auto sleep mode (~10 minutes)
Over-range display (“OL”) and contact error warning (“----Ω”)
2-wire and 3-wire testing for both simple and precision measurements
Double insulation protection for user safety
CAT III 600V rated for professional field applications

The UT521 is a dependable, user-friendly tool ideal for electricians, engineers, and maintenance professionals who demand accuracy, safety, and performance in earth resistance testing.

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