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header-product Ground Resistance Tester Unit UT522 — Earth/Soil Resistance Measurement Portable Meter
152.49 €
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AiO.lv Home & Renovation Handheld tools Measuring tools Unit

Ground Resistance Tester Unit UT522 — Earth/Soil Resistance Measurement Portable Meter

Ground Resistance Tester Unit UT522 Photo 1
Ground Resistance Tester Unit UT522 Photo 2
Ground Resistance Tester Unit UT522 Photo 1
Ground Resistance Tester Unit UT522 Photo 2
Ground Resistance Tester Unit UT522 Photo 1
Ground Resistance Tester Unit UT522 Photo 2
Ground Resistance Tester Unit UT522 Photo 1
Ground Resistance Tester Unit UT522 Photo 2
Ground Resistance Tester Unit UT522 — Earth/Soil Resistance Measurement Portable Meter
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Short description

Portable ground (earth) resistance tester Unit UT522 designed for accurate measurement of soil and grounding system resistance. Provides direct resistance readings for earth electrodes and grounding networks, with features for reliable contact testing, manual or automatic range selection, and clear digital display. Suitable for electricians, installers and maintenance teams for site verification and safety compliance checks.
Available at price 152.49 €: 104 pcs.
Total available for order: 208 pcs.
Warranty: 2 Years
SKU: 8771249
Manufacturer: Unit
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1.99 €

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Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
19.10.2026 {{selectedOffer.officeDeliveryString}}
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22.10.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 € (Weight: 2.21 kg)
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36 months installment: from 4.24 euros per month
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Product information

Description

The Unit UT522 Ground Resistance Tester is a portable meter designed for direct measurement of earth/soil resistance and grounding systems. The instrument provides clear digital readings of resistance values for single earth electrodes and multi-point grounding networks. It features selectable manual or automatic range modes, a large display for easy reading, and reliable contact testing to ensure valid measurements during installation, commissioning and periodic inspection tasks.

Advantages

The tester delivers fast and repeatable resistance measurements with stable contact verification, reducing uncertainty during field testing. Its portability and battery operation make it practical for on-site verification and maintenance work. Simple range selection and an intuitive display minimize the need for extensive user training while maintaining accuracy needed for compliance checks and safety inspections.

Suitable for

  • Measuring earth electrode resistance for building grounding systems
  • Testing soil resistivity and ground network continuity at substations and installations
  • Periodic safety verification and installation commissioning by electricians and technicians
  • Field checks on lightning protection and surge grounding systems

Key specifications

  • Function: Earth/soil and grounding system resistance measurement
  • Display: Digital readout for resistance values
  • Range selection: Manual and automatic range modes
  • Contact testing: Dedicated verification to ensure valid probe connections
  • Power: Portable unit powered by internal batteries for field use
  • Form factor: Handheld, lightweight enclosure suitable for on-site measurement

How to use

Connect the test leads and auxiliary probes according to the grounding configuration being measured, ensuring secure contact with the electrode and earth stakes. Select the appropriate measurement mode (manual or automatic) and initiate the test to obtain the resistance reading on the digital display. Verify contact status indicated by the unit before recording results, and repeat measurements if required to confirm consistency. Observe standard safety practices when working near live equipment and de-energize circuits where necessary before performing earth resistance tests.

Usage recommendations

For reliable results, place auxiliary stakes at recommended distances from the electrode under test, avoid measuring in saturated or disturbed soil without noting conditions, and allow the instrument to stabilise between readings. Calibrate and maintain the tester as specified by the manufacturer and store it in a dry, protected environment when not in use.

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Product comparison

The Ground Resistance Tester Unit UT522 is compared with similar earth resistance testing instruments: Unit UT572, Habotest HT2302, Sonel MRU-120, Sonel MRU-200, and Sonel MRU-120HD. All these devices are designed to test grounding systems, electrodes, and lightning protection to ensure electrical safety, but they vary in professional complexity, supported measurement methods, and practical use cases—ranging from basic site maintenance to advanced engineering and geological surveys.

⚙️ The table below compares key characteristics, device types, brands, and practical applications of the selected instruments.

ParameterGround Resistance Tester Unit UT522Ground Resistance Tester Unit UT572Earth Resistance Tester Habotest HT2302Sonel MRU-120Sonel MRU-200Sonel MRU-120HDPractical significance
BrandUnitUnitHabotestSonelSonelSonelAllows choosing the equipment reliability level from standard portable meters to specialized professional lines.
Device typePortable earth resistance testerHandheld instrument for earth resistanceEarth resistance tester with 3-phase measurement supportProfessional earth resistance meterProfessional meter for resistance and soil resistivityProfessional heavy-duty earth resistance meterDefines the suitability of the device for basic verification or complex industrial tasks.
ApplicationFor electricians and installers for site verification and safety complianceFor technical personnel to assess earthing continuity and resistanceFor residential, commercial, and industrial systems up to 2000 ΩFor precise measurements in industrial and commercial electrical networksFor complex systems, infrastructure, and geological surveysFor precise diagnostics in industrial, commercial, and residential power networksIndicates alignment with project scale and diagnostic requirements.
FeaturesDirect reading, manual or automatic range selectionHandheld instrument for electrical installation assessmentWide range 0.01–2000 Ω, 3-phase measurement supportMeasurement of earthing and lightning protection systemsSupport for 3-pole, 4-pole, and impulse methodsMeasurement of earthing, soil resistivity, and conductor continuityAffects flexibility when performing tests in field conditions.

◎ The table below evaluates how each product matches specific usage scenarios and buyer profiles.

Use caseRecommended productWhy
Basic electrical safety checks and site maintenanceGround Resistance Tester Unit UT522Provides direct readings and is convenient for regular verifications by electricians and installers.
Handheld diagnostics and continuity checks on siteGround Resistance Tester Unit UT572Offers a portable handheld form factor for assessing earthing electrodes and connections.
Measurements across a wide range with 3-phase supportEarth Resistance Tester Habotest HT2302Covers up to 2000 Ω and is suitable for residential, commercial, and industrial networks.
Professional diagnostics of industrial infrastructureSonel MRU-120Designed specifically for precise measurements in commercial and industrial electrical installations.
Geological surveys and complex grounding configurationsSonel MRU-200Supports multi-pole and impulse methods for comprehensive grounding system design.
Work in demanding conditions and detailed conductor analysisSonel MRU-120HDOffers a robust, heavy-duty build for demanding industrial and residential power networks.

The Ground Resistance Tester Unit UT522 is designed for electricians and installers performing routine site verifications and safety compliance checks, featuring straightforward manual and automatic range selection. Unlike more complex and advanced Sonel multi-pole systems or Habotest specialized instruments, this device is optimal for standard testing tasks without unnecessary complexity. A buyer should prefer the Ground Resistance Tester Unit UT522 when seeking a reliable, straightforward tool for essential earth resistance measurements.

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Stock data
Warehouse Stock Delivery to the store Store Price
WH323 104 19.10.2026 Best delivery
152.49 € Best price
WH355 104 23.10.2026
202.49 €
152.49 €
Stock: 104
Delivery Date: 19.10.2026 Best delivery
Warehouse: WH323
202.49 €
Stock: 104
Delivery Date: 23.10.2026
Warehouse: WH355

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Customer questions

FAQ

How much does the Ground Resistance Tester Unit UT522 cost, and is it available for purchase?

The price is 152.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 208 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 19.10.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

Can Ground Resistance Tester Unit UT522 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. We work with leading banks and leasing companies in Latvia, allowing you to make your purchase on convenient terms — with a minimal down payment and a repayment period from 3 to 36 months. You can apply for credit or installments for the Ground Resistance Tester Unit UT522 online, and the application process is as simple as possible:
  • Select the product on the website and add it to your cart;
  • When placing your order, choose the payment method “Installments”;
  • Fill in the required details for the lending partner;
  • Receive a decision within a few minutes.
For more information about available payment options, interest-free installment terms, and credit conditions in Latvia, please visit the Payment page.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Unit products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Unit service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.
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