# W-STAR WSNF904 Visual Fault Locator 10mW for SM/MM Optical Fiber Testing

**URL:** https://aio.lv/en/product--w-star-wsnf904--12548639
**Data updated:** 2026-07-06 17:43 (EEST)
**Category:** Other goods
**Manufacturer:** W-STAR
**Manufacturer code:** WSNF904
**EAN:** 8594164996870
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 27.99 €
**Prices and availability valid until:** 2026-08-12 23:59
**Price without VAT (21%):** 23.13 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--w-star-wsnf904--12548639

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 28.07.2026 | free |
| Pickup points | 31.07.2026 | 1.89 EUR |
| Courier delivery to door | 31.07.2026 | 4.99 EUR |

## Summary description

The W-STAR WSNF904 is a 10mW visual fault locator designed for testing single-mode and multi-mode optical fiber paths. It provides a reliable solution for identifying breaks, bends, or faulty connectors over a distance of 8-12 km. This compact tool is essential for fiber optic network maintenance, troubleshooting, and installation verification, ensuring precise signal path diagnostics in various telecommunication environments.

## Long description

The W-STAR WSNF904 is a professional-grade 10mW visual fault locator (VFL) engineered for precise testing of single-mode and multi-mode optical fiber paths. This compact and reliable diagnostic tool is designed to identify breaks, sharp bends, or faulty connectors by emitting a highly visible red laser light. With an effective operating range of 8 to 12 kilometers, it serves as an essential instrument for technicians involved in the installation, maintenance, and troubleshooting of fiber optic networks.
Advantages
The primary advantage of the W-STAR WSNF904 is its ability to provide rapid and accurate visual identification of faults within an optical link. By utilizing a 650nm wavelength, the device ensures that light leakage at damaged points is easily detectable even through cable jackets. Its universal 2.5mm connector interface offers broad compatibility with standard SC, FC, and ST connectors, making it a versatile solution for various telecommunication environments. The device supports both steady and flashing operation modes, which helps in distinguishing specific fault types and improving visibility in different lighting conditions.
Suitable for
Identifying fiber breaks and micro-bends
Verifying continuity in optical paths
Troubleshooting faulty connectors and splices
Installation verification for single-mode and multi-mode networks
This device may not be suitable for testing extremely long-haul fiber spans exceeding 12 kilometers, as the 10mW output power is optimized for shorter to medium-range diagnostics. Additionally, it is not intended for measuring precise signal loss or attenuation levels, as it is strictly a visual fault identification tool rather than an optical power meter or OTDR.
Key specifications
Output power: 10mW
Wavelength: 650±10nm
Fiber compatibility: Single-mode (SM) and Multi-mode (MM)
Connector type: 2.5mm universal (SC, FC, ST)
Operating range: 8–12 km
Operating temperature: -20°C to +60°C
Power supply: 1.5V AAA batteries
How to use
To operate the W-STAR WSNF904, first ensure that the device is powered by inserting the required AAA batteries. Connect the optical fiber to be tested to the 2.5mm universal port on the device. Once connected, select the desired output mode—either steady or flashing—using the control button. The visible red light will travel through the fiber, and any break or significant bend will cause the light to leak through the cable cladding, allowing for immediate visual detection of the fault location.
What to consider before purchase
Ensure your fiber connectors are compatible with the 2.5mm universal interface
Verify that the 8-12 km range is sufficient for your specific network infrastructure
Note that AAA batteries are not included in the package
Confirm the device is intended for visual fault identification rather than quantitative signal measurement
Usage recommendations
Always inspect and clean fiber optic connectors before insertion to prevent contamination of the internal laser components. Avoid looking directly into the laser output to protect your eyesight. Store the device in a dry, temperature-controlled environment when not in use to maintain optimal performance.

## FAQ

### How much does the W-STAR WSNF904 Visual Fault Locator 10mW cost, and is it available for purchase?

The price is 27.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 28.07.2026 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. 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 W-STAR 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 W-STAR 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/12548639/68930672_large.webp