# Sonel MRU-21 Earth Resistance Meter

**URL:** https://aio.lv/en/product--sonel-wmplmru21--12454942
**Data updated:** 2026-05-18 02:49 (EEST)
**Category:** Measuring tools
**Manufacturer:** Sonel
**Manufacturer code:** WMPLMRU21
**EAN:** 5907624013346
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 775.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 640.90 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonel-wmplmru21--12454942

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

The Sonel MRU-21 is a professional earth resistance meter designed for precise electrical measurements. This reliable device is essential for testing grounding systems in industrial, commercial, and residential installations. It provides accurate data for safety inspections and maintenance, ensuring compliance with electrical standards. Compact and durable, it is an ideal tool for field technicians and electrical engineers.

## Long description

The Sonel MRU-21 Earth Resistance Meter is a professional-grade instrument engineered for the precise measurement of grounding systems. This device is specifically designed to verify the integrity and safety of earthing installations in a wide range of environments, including residential, commercial, and industrial sectors. By providing reliable and accurate data, it assists electrical engineers and technicians in ensuring that grounding systems meet necessary safety standards and regulatory requirements.
Advantages
The device stands out due to its high measurement accuracy and robust construction, which is tailored for demanding field conditions. Its intuitive interface allows for efficient operation, reducing the time required for complex electrical testing. The compact design ensures high portability, making it a practical choice for professionals who frequently move between different job sites. Furthermore, the meter is built to withstand the rigors of daily use, offering long-term reliability for critical safety inspections and routine maintenance tasks.
Suitable for
Testing grounding systems in residential buildings
Verifying earthing in commercial and industrial facilities
Safety inspections for electrical installations
Routine maintenance of grounding electrodes
This device may not be suitable for high-voltage transmission line grounding measurements or specialized laboratory research requiring extreme precision beyond standard electrical safety testing. It is also not designed for use in explosive atmospheres or environments where specific hazardous area certifications are mandatory.
Key specifications
Measurement method: 3-pole and 2-pole earth resistance
Measurement range: Wide range for various soil conditions
Display: Clear digital readout for easy data interpretation
Power supply: Battery-operated for field portability
Housing: Durable, impact-resistant casing
To use the Sonel MRU-21, connect the test leads to the grounding electrode and the auxiliary probes according to the standard 3-pole or 2-pole measurement configuration. Ensure that the probes are placed at the correct distances as specified in the user manual to maintain measurement accuracy. Once the connections are secure, activate the device and select the appropriate measurement mode to obtain the resistance value. The results are displayed clearly on the screen, allowing for immediate assessment of the grounding system's condition.
What to consider before purchase
Verify that the measurement range meets your specific project requirements
Ensure you have the necessary auxiliary probes and cables for your testing environment
Check the battery requirements for continuous field operation
Confirm compatibility with local electrical safety standards
For optimal results, always ensure that the auxiliary probes are clean and inserted firmly into the soil to minimize contact resistance. Regularly calibrate the device to maintain measurement accuracy and follow the manufacturer's guidelines for storage and maintenance to extend the lifespan of the equipment.

## FAQ

### How much does the Sonel MRU-21 Earth Resistance Meter cost, and is it available for purchase?

The price is 775.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 14.07.2026 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, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Sonel MRU-21 Earth Resistance Meter be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### 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 Sonel 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 Sonel 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. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12454942/68757327_large.webp