# Sonel TDR-420 Cable Fault Locator Reflectometer

**URL:** https://aio.lv/en/product--sonel-wmpltdr420--10672302
**Data updated:** 2026-05-18 02:46 (EEST)
**Category:** Cable testers
**Manufacturer:** Sonel
**Manufacturer code:** WMPLTDR420
**EAN:** 5907624027442
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 1 211.99 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 1 001.64 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonel-wmpltdr420--10672302

## 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 TDR-420 is a professional time-domain reflectometer designed for precise cable fault location. This handheld device identifies the distance to faults, breaks, or short circuits in various types of metallic cables. It is an essential tool for electrical maintenance, telecommunications, and infrastructure diagnostics, offering reliable performance for field technicians and engineers.

## Long description

The Sonel TDR-420 is a professional time-domain reflectometer engineered for the precise identification and localization of faults in metallic cables. This handheld diagnostic instrument allows technicians to accurately determine the distance to breaks, short circuits, and other impedance irregularities within electrical and telecommunications networks. Designed for field use, the device provides reliable measurements, ensuring efficient troubleshooting and maintenance of cable infrastructure.
Advantages
The device offers high measurement accuracy, allowing for the rapid detection of cable faults, which significantly reduces downtime during repair operations. Its ergonomic and durable design makes it suitable for demanding field conditions, while the intuitive interface ensures that engineers can perform complex diagnostics with minimal training. By providing clear distance readings to faults, the reflectometer eliminates the need for time-consuming manual cable inspections, thereby increasing overall operational productivity.
Suitable for
Locating breaks and short circuits in power cables
Diagnosing faults in telecommunications and data transmission lines
Maintenance of industrial cable infrastructure
Field diagnostics for electrical contractors and service engineers
When it may not be suitable
This device is specifically designed for metallic cables and is not suitable for testing fiber optic lines or non-conductive materials. Additionally, it may not provide accurate results on cables with complex branching or multiple parallel connections without proper isolation of the test segment.
Key specifications
Measurement method: Time-Domain Reflectometry (TDR)
Compatible cable types: Metallic conductors
Display: High-contrast graphical screen
Portability: Handheld, battery-operated design
Measurement range: Adjustable based on cable parameters
How to use
To operate the Sonel TDR-420, connect the test leads to the conductors of the cable under investigation. Select the appropriate cable type or manually input the velocity of propagation (VoP) to ensure measurement accuracy. Initiate the test to send a signal pulse down the line; the device will analyze the reflected signal and display the distance to any detected impedance changes or faults on the screen. Review the waveform to interpret the nature of the fault and record the distance for repair purposes.
What to consider before purchase
Verify that the cable types you intend to test are metallic
Ensure the device's measurement range meets your specific infrastructure requirements
Consider the need for periodic calibration to maintain measurement precision
Usage recommendations
Always ensure the cable under test is de-energized before connecting the reflectometer to prevent damage to the device and ensure operator safety. Regularly check the battery status and keep the test leads in good condition to maintain the accuracy of your diagnostic results.

## FAQ

### How much does the Sonel TDR-420 Cable Fault Locator Reflectometer cost, and is it available for purchase?

The price is 1,211.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 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 TDR-420 Cable Fault Locator Reflectometer 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/10672302/57718203_large.webp