UNI-T UT521 ground tester

UNI-T UT521 grounding tester
The UNI-T UT521 grounding tester is a reliable device designed for accurate measurement of grounding resistance in power systems, lightning protection installations, and in the grounding systems of all kinds of electrical equipment. It allows for both simple 2-wire measurement and precise 3-wire measurement. The UT521 offers manual range selection, a data hold function, a low battery indicator, and automatic shutdown. The backlit LCD display ensures readability of results in all conditions. The device also features a full icon display, double protective insulation, and indicators for poor contact and overload ("OL"). Additionally, the tester is CE and UKCA certified, confirming its high quality and safety.


An indispensable tool in the field and in service
Thanks to its lightweight and compact design, the UT521 is ideal for field work, providing convenience and mobility. The manual range selection function allows for full control over measurements, and error indicators—such as poor contact and overload indication—increase safety and precision. The tester can quickly perform simple 2-wire tests and accurate 3-wire measurements, making it a versatile tool for both installers and service technicians.


Rugged design and convenience of use
The UT521 tester is designed for intensive use—double insulation effectively protects the user, and the automatic shutdown function saves battery power. The large backlit display makes it easy to work in difficult lighting conditions, and the Data Hold function allows you to conveniently save measurement results. The UNI-T UT521 is an excellent choice for any professional looking for a precise, reliable, and easy-to-use ground tester.



Included
grounding tester, batteries, straight test leads with crocodile clamps, standard test leads with crocodile clamps, grounding spike, carrying bag, instruction manual

 



Manufacturer: UNI-T
Model: UT521
Ground resistance measurement (Ω): 0~20 Ω (accuracy: ±(2%+10)); 0~200 Ω (accuracy: ±(2%+3)); 0~2000 Ω (accuracy: ±(2%+3)); 0~40 Ω; 0~400 Ω; 0~4000 Ω
AC ground voltage (V) measurement: 0~200 V (accuracy: ±(1%+4)); 0~400 V
Frequency: 50 Hz / 60 Hz
Number of displayed digits: 2000
Manual range selection: Supported
Automatic shutdown: Supported, approximately 10 minutes of inactivity
Low battery indicator: Built-in
Data hold function: Supported
Data memory: 20 sets
LCD display backlighting: Built-in
Full icon display: Supported
Double insulation protection: Supported
Low contact indicator ("...Ω"): Built-in
Out of range ("OL") indicator: Built-in
Simple 2-wire measurement: Supported
Precise 3-wire measurement: Supported
Power supply: 6 × 1.5 V battery (LR6)
Display: 70.6 × 34 mm
Product color: Red, gray
Weight: 560 g
Product dimensions: 160 × 100 × 70.5 mm