








Description
| Model# | Output Power |
| FF-VFL-A1 | 1mW |
| FF-VFL-A5 | 5mW |
| FF-VFL-A10 | 10mW |
| FF-VFL-A20 | 20mW |
| FF-VFL-A30 | 30mW |
| FF-VFL-ALC | LC Adapter Sold Separately |
This Visual Fault Loctor (VFL) is specially designed for field workers who need an efficient and economical tool for fiber tracing, fiber routing and continuity checking in optical networks. The VFL can find break points, poor connection point, bending or cracking in fiber optic cables; and it can find faults located in an OTDR dead zone and also can be used for end-to-end visual fiber identification.
The VFL launches 650nm visible light into a fiber. When the light encounters a break or sharp bend, it scatters, and the scattered light can be observed emerging from the cable. More importantly, The VFL can locate break points in short patchcords, which an OTDR cannot detect due to their operating dead zone.
The Visual Fault Locator can be operated in either continuous wave mode (CW mode) or in pulsed mode. Pulsed mode aids in locating faults under high ambient light conditions and improve battery life. It also could be used in checking connector quality.
NOTE: Customers need to buy battery by themself, because battery is refused by most mail agent to carry. This VFL uses normal AAA battery, so customers can easily get them from their local market.
| Visual Fault Loctor | |||||
| Model# | FF-VFL-A1 | FF-VFL-A5 | FF-VFL-A10 | FF-VFL-A20 | FF-VFL-A30 |
| Wavelength | 650nm | ||||
| Emitter type | FP-LD | ||||
| Output Power | ≥1mW | ≥5mW | ≥10mW | ≥20mW | ≥30mW |
| Detecting Range | ≥5Km | ≥8Km | ≥12Km | ≥16Km | ≥20Km |
| Optical Connector | 2.5mm Universal Connector, 1.25mm Adapter Optional | ||||
| Modulation Frequency | CW/3Hz/9Hz | ||||
| Battery Life (CW) | 13 Hours | 8 Hours | 6 Hours | 5 Hours | 3 Hourse |
| Battery Life (9Hz) | 19 Hours | 17 Hours | 10 Hours | 7 Hours | 5 Hours |
| Battery Life (3Hz) | 23 Hours | 20 Hours | 12 Hours | 10 Hours | 6 Hours |
| Power Supply | 2 AAA Battery | ||||
| Working Temperature | -35℃~+70℃; <90%RH | ||||
| Storage Temperature | -40℃~+90℃; <90%RH | ||||
| Dimension | Ø13 x 181mm | ||||
| Weight | 106g (without battery) | ||||

FAQ
Q1: What are the primary functions and applications of the FF-VFL-A Visual Fault Locator?
A: The FF-VFL-A is designed for field workers needing an efficient tool for fiber tracing, fiber routing, and continuity checking in optical networks. It launches 650nm visible light to identify breakpoints, poor connections, bends, or cracks, including faults located within OTDR dead zones.
Q2: What model options, output power levels, and detecting ranges are available in the FF-VFL-A series?
A: Model options include:
- FF-VFL-A1: ≥1mW output power, ≥5km detecting range.
- FF-VFL-A5: ≥5mW output power, ≥8km detecting range.
- FF-VFL-A10: ≥10mW output power, ≥12km detecting range.
- FF-VFL-A20: ≥20mW output power, ≥16km detecting range.
- FF-VFL-A30: ≥30mW output power, ≥20km detecting range.
- LC Adapter: Optional adapter sold separately.
Q3: What are the optical connector and modulation specifications?
A: Key optical specifications include:
- Emitter & Wavelength: FP-LD emitter at 650nm wavelength.
- Optical Connector: 2.5mm Universal Connector (1.25mm adapter optional).
- Modulation Frequency: Continuous Wave (CW), 3Hz, and 9Hz pulsed modes.
Q4: What are the power, physical, and environmental specifications?
A: Operational parameters include:
- Power Supply: 2 AAA batteries (not included due to shipping restrictions).
- Dimensions & Weight: Ø13 × 181mm, weighing 106g without batteries.
- Operating Temperature: -35℃ to +70℃ (<90% RH).
- Storage Temperature: -40℃ to +90℃ (<90% RH).
Q5: What is the reference price, and how can I submit an inquiry?
A: The reference price for the FF-VFL-A is $89. Select your required output power option on the product page, then click Add to Quote or Request a Demo to send a request.




