{{ totalProductsCount }}

In cart {{totalProductsCount}} item(s)

Total:
{{sum | formatAmount}}

Your cart is empty

header-product UNI-T UT278A+ Clamp Earth Ground Tester, 800 Ohm, 20A, 32mm Jaw
418.95 €

UNI-T UT278A+ Clamp Earth Ground Tester, 800 Ohm, 20A, 32mm Jaw

UNI-T UT278A+ Clamp Earth Ground Tester Photo 1

New arrival!

Keep track of price changes You keep track of price changes
Watch the price drop

Leave your address - as soon as the price of the product goes down, you'll know about it right away

You keep track of price changes

UNI-T UT278A+ Clamp Earth Ground Tester, 800 Ohm, 20A, 32mm Jaw

{{email}}
You keep track of price changes

UNI-T UT278A+ Clamp Earth Ground Tester, 800 Ohm, 20A, 32mm Jaw

{{email}}
{{selectedOffer && selectedOffer.price | formatAmount}}

Short description

The UNI-T UT278A+ is a professional clamp-on earth ground tester designed for precise resistance measurements up to 800 Ohm and current up to 20A. Featuring a 32mm jaw opening, it includes an EBTN LCD display, audible and visual alarms, and an auto power-off function. This reliable tool is ideal for electrical maintenance and grounding system testing in industrial and commercial environments.
Available for order: 10 pcs.
Warranty: 2 Years
SKU: 12574813
Manufacturer: Unit
free shipment

Cheapest delivery:

Venipak Pickup LV, Venipak Locker LV

Pick-up points

Venipak Pickup LV

Venipak Locker LV

Cost

1.89 €

Deliver

{{selectedOffer.parcelStationDeliveryString}}

Customer service center
2b. Kengaraga str., Riga, Latvia, LV-1063
Wednesday {{selectedOffer.officeDeliveryString}}
free
Courier Delivery Please note that in case of a large parcel additional delivery costs may apply!
20.07.2026 {{selectedOffer.courierDeliveryString}}
From 4.99 €
Parcel couriers
Venipak Pickup LV / Venipak Locker LV / Latvijas Pasts pakomāts / Unisend LV / DPD Paku skapis / Omniva LV / Latvijas Pasts nodaļa
20.07.2026 {{selectedOffer.parcelStationDeliveryString}}
From 1.89 €
0 credit

pay in 3 equal parts

today

0 €

afterward

3 mth. х 139.65 €

overpayment

0 €

All payment Methods:
Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment
36 months installment: from 11.64 euros per month
Together cheaper
{{product.price | formatAmount}}
{{product.title}}
{{productBundle.reference.specialPrice | formatAmount}}
{{productBundle.title}}
{{productBundlePreviousPrice | formatAmount}}
{{productBundleSpecialPrice | formatAmount}}

You saving {{productBundleYouSave | formatAmount}}

Product information

Description

The UNI-T UT278A+ is a professional-grade clamp-on earth ground tester engineered for high-precision resistance and leakage current measurements. This device allows for the rapid and safe assessment of grounding systems without the need to disconnect ground lines or utilize auxiliary electrodes. Built with a robust double-insulation design, it effectively minimizes environmental interference, making it a reliable choice for demanding industrial and commercial electrical maintenance tasks.

Advantages

This tester stands out due to its ability to perform measurements without interrupting the circuit, which significantly improves workflow efficiency and safety. The integration of an EBTN LCD display ensures excellent visibility in various lighting conditions, while the 32mm jaw opening accommodates a wide range of conductors. With advanced features such as auto-calibration, data storage for up to 300 readings, and simultaneous resistance and current display, users can conduct comprehensive diagnostics with ease. The inclusion of audible and visual alarms provides immediate feedback when measurements exceed set limits, ensuring operational safety.

Suitable for

  • Industrial grounding system maintenance
  • Commercial electrical infrastructure testing
  • Leakage current monitoring in power distribution
  • Routine electrical safety inspections
  • Telecommunications and utility grounding checks

When it may not be suitable

This device is specifically designed for clamp-on resistance and leakage current measurements. It is not intended for use in high-voltage transmission lines exceeding the specified current range or for applications requiring direct contact resistance testing where a clamp-on method is not applicable.

Key specifications

  • Resistance measurement range: 0.01 Ohm to 800 Ohm
  • Leakage current measurement range: 0mA to 20A
  • Jaw opening: 32mm
  • Display: EBTN LCD with backlight
  • Data storage capacity: 300 sets
  • Power source: 4 x 1.5V (LR6) batteries
  • Safety features: Audible and visual alarms, auto power-off, auto-calibration

How to use

To operate the UNI-T UT278A+, ensure the batteries are correctly installed and the device is powered on. Simply open the 32mm jaw and clamp it around the grounding conductor or wire being tested. The device will automatically detect the resistance and leakage current, displaying the results clearly on the EBTN screen. Use the data hold function to freeze readings if necessary, or save them to the internal memory for later analysis. Ensure the jaw is fully closed for accurate results and avoid placing the device near strong electromagnetic fields that could interfere with the reading.

What to consider before purchase

  • Verify that the conductor diameter fits within the 32mm jaw opening.
  • Ensure the expected resistance and current values fall within the specified measurement ranges.
  • Consider the environment of use, as the device is optimized for grounding systems where a loop can be formed.
  • Check that the required 1.5V LR6 batteries are available for operation.
Usage recommendations: Regularly perform auto-calibration to maintain measurement accuracy. Always keep the jaw contact surfaces clean and free of debris to ensure optimal performance and reliable readings during every inspection.

Description

Machine translation. Load original

Similar products

{{product.title}} Show details Hide details

{{highlightedFeature.featureTitle}}:

{{getProductFeatureValueById(product, highlightedFeature.featureId)}}

{{product.price | formatAmount}}
Might be useful
{{product.manufacturerName}}
{{product.categoryName}}
{{product.title}}
{{product.specialPrice}}
{{product.price}}

Customer reviews

Customer questions

FAQ

How much does the UNI-T UT278A+ Clamp Earth Ground Tester cost, and is it available for purchase?

The price is 418.95 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 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 Wednesday 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 UNI-T UT278A+ Clamp Earth Ground Tester 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 UNI-T UT278A+ Clamp Earth Ground Tester 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.
warranty
14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
shipping
Fast Delivery Get your orders as quickly as possible — right to your door, parcel lockers, or pickup points across Latvia and the EU.
payment
Secure Payment Pay the way you prefer: cash, VISA, MasterCard, Apple Pay, Google Pay, bank transfer, or 0% installment plan.
warranty
Quality Since 2008 AiO.lv has been on the market for over 18 years and has earned trust — with more than 6000 genuine positive reviews on Google.