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Uni-T UT522 Ground Tester

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Uni-T UT522 Earth Tester The Uni-T UT522 Earth Tester is a practical device for measuring earth resistance and AC earth voltage, designed for use in electrical installations, power systems, and lightning protection systems. The UT522 model offers a r

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Uni-T UT522 Earth Tester

The Uni-T UT522 Earth Tester is a practical device for measuring earth resistance and AC earth voltage, designed for use in electrical installations, power systems, and lightning protection systems. The UT522 model offers a resistance measurement range up to 4000Ω and a voltage range up to 400V, and supports both the simple 2-wire method and the more accurate 3-wire method. Thanks to manual range selection, a clear backlit display, and features such as data hold and bad contact indication, the device is well-suited for daily field work. The compact housing and battery power further facilitate mobile use. The backlit LCD display makes it easy to read results even in low light. The Data Hold function allows you to freeze the result on the screen, which is useful when working in hard-to-reach places. Additionally, the device alerts you when the range is exceeded or when there is poor contact, helping to avoid measurement errors.

Precise measurements in various conditions

The UT522 allows for earth resistance measurement across a wide range up to 4000Ω, making it suitable for both simple installations and more demanding systems. Support for the 3-wire method increases measurement accuracy, making results more reliable for professional applications. The device features double insulation, which enhances user safety when working with electrical installations. Compliance with CE and UKCA certifications confirms adherence to European quality and safety standards.

Included in the set
  • Uni-T UT522 Earth Tester
  • Batteries
  • Straight test leads with alligator clips
  • Standard test leads with alligator clips
  • Earth test probes
  • Carrying strap
Manufacturer Uni-T
Model UT522
Earth resistance measurement 0–40Ω, accuracy ±(2%+20)
AC ground resistance measurement 0–400Ω, accuracy ±(2%+3)
AC ground resistance measurement 0–4000Ω, accuracy ±(2%+3)
AC ground voltage measurement 0–400V, accuracy ±(1%+6)
Supported frequency 50Hz / 60Hz
Measurement methods 2-wire and 3-wire
Display Backlit LCD
Counting range 4000
Power supply 6 × 1.5V LR6 batteries
Dimensions 160 × 100 × 70.5 mm
Net weight 560 g

Dimensions and weights

Gross weight
2.2 kg

Product codes

EAN
6935750552209
Manufacturer code
UT522

Photopoint offers free shipping for orders over 99 € delivered to Estonia. Take a look in the tab "Delivery" for a more precise delivery estimate.

For this product you can select the desired delivery method at the shopping cart:

Photopoint store Pick-up


Place your order from Photopoint web store and pick your goods up from one of Photopoint`s brick and mortar stores. The delivery to Photopoint store is free even for orders less than 99 €. You will be noticed by e-mail when your order is ready for pick-up.

The Photopoint stores are located in Tallinn and Tartu. See the exact locations from here.

Omniva parcel terminal 

You can order the goods to one of the Omniva Parcel terminals. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. It is as simple as that.

See Omniva Parcel terminal locations here.

SmartPOST parcel terminal

Did not find an Omniva terminal at suitable location? Try SmartPost. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. This method actually works for all parcel terminals.

See SmartPOST parcel terminal locations here.

DPD parcel locker

Make sure you check out also the locations of DPD parcel lockers. These are located all over Estonia. The delivery is the same. As the shipment arrives to the selected locker, you will be sent an SMS with a unique code. Go to the locker, enter the code and take your package.

See DPD parcel locker locations here.

Smartpost Finland parcel terminal

SmartPOST Finland is the best way to order goods to Finland. These terminals work the same way as in Estonia. As the shipment arrives to the selected terminal in Finland, you will be sent an SMS-notification with an unique code. Go to the terminal, enter the code and take your package.

See SmartPOST Finland parcel terminal locations here.

Matkahuolto parcel service

Matkahuolto is easy way to order goods to Finland. These are located also in smaller Finnish towns. As the shipment arrives to the selected Matkahuolto outlet, you will be sent an SMS-notification or an e-mail. Go to the outlet, show your ID and take your package.

See Matkahuolto outlet locations here.

Omniva courier delivery

The courier will transport your goods from Photopoint straight to the provided address. The delivery will take place at workdays from 08:00 to 17:00. Hold your phone near you as the courier will call you prior to its arrival. Please make sure there is someone at the destination, eligible to receive the shipment. 

The product is out of stock. For additional availability and preorder information please contact us here.

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