# Ergom WJN 3 Voltage Tester

**URL:** https://aio.lv/en/product--ergom-e07mt-01010100303--12459478
**Data updated:** 2026-05-18 09:34 (EEST)
**Category:** Measuring tools
**Manufacturer:** Ergom
**Manufacturer code:** E07MT-01010100303
**EAN:** 5900003787098
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

The Ergom WJN 3 is a professional voltage tester designed for reliable electrical circuit diagnostics. This compact and durable tool allows for quick and safe verification of voltage presence in electrical installations. It is an essential device for electricians and maintenance technicians, providing accurate results for troubleshooting and ensuring safety during electrical work.

## Long description

The Ergom WJN 3 voltage tester is a professional-grade diagnostic tool engineered for the precise verification of voltage in electrical circuits. Designed with both safety and efficiency in mind, this compact device allows users to quickly detect the presence of electrical current in various installations. Its robust construction ensures reliable performance in demanding environments, making it a dependable choice for electricians, maintenance professionals, and DIY enthusiasts who require accurate feedback during electrical troubleshooting and routine safety checks.
Advantages
The primary benefit of the Ergom WJN 3 lies in its straightforward operation and high level of reliability. It provides immediate visual feedback, allowing for rapid assessment of electrical status without the need for complex configurations. The ergonomic design ensures that the device is easy to handle during intensive work sessions, while its durable housing protects internal components from mechanical stress. By offering a clear indication of voltage, it significantly reduces the risk of accidental contact with live components, thereby enhancing overall workplace safety.
Suitable for
Verifying voltage presence in residential and commercial electrical wiring
Troubleshooting electrical circuits and identifying power outages
Routine maintenance of electrical installations and equipment
Checking the status of fuses, switches, and outlets
When it may not be suitable
This voltage tester is not intended for high-voltage industrial applications or specialized diagnostic tasks that require digital measurement displays or advanced data logging capabilities. It should not be used in environments where the voltage levels exceed the device's specified safety rating.
Key specifications
Compact and portable design
Clear visual voltage indication
Durable, impact-resistant housing
Designed for standard electrical circuit diagnostics
How to use
To use the Ergom WJN 3, ensure that the device is in good physical condition before each use. Place the testing probes firmly against the electrical points or conductors you wish to verify. The device will provide an immediate indication if voltage is present. Always ensure that you are following standard electrical safety protocols and wearing appropriate protective equipment when working with live circuits.
What to consider before purchase
Verify that the voltage range of the device matches your specific application needs
Ensure the device is compatible with the type of electrical installations you intend to test
Check that the device meets the safety standards required for your specific work environment
Usage recommendations
Always perform a self-test on a known live source before and after using the device to ensure it is functioning correctly. Never attempt to open the casing or modify the internal components, as this may compromise the safety and accuracy of the tool.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### 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 Ergom 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 Ergom 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/12459478/68761533_large.webp