
Visual Fault Locators
Pen-design Visual Fault Locators
SUN Telecom’s Pen-design Visual Fault Locator, pen-size and light, outputs the visible red laser, and can be used for locating optical broken point which OTDR can’t find and area of high loss caused by bending. It is suitable for both single mode and multimode fiber.

Figure-1 Pen-design Visual Fault Locator
(SUN-VFL250)
- Features:
-
- Used for locating broken point in fibers
- Equipped with a 650nm visible laser diode
- Operated in continuous or pulse modes for clear noticeable results
- Operating mode shown by the Status LED indicator
- Battery power turned on/off by the power switch on the end
- Clip pocket-size pen design
- Applications:
-
- Maintenance in Telecom
- Maintenance in CATV
- Test Lab of optical fibers
- Other fiber optic measurements
Specifications:
| Parameters |
Specifications |
| Type |
SUN-VFL250 |
SUN-VFL1000S |
SUN-VFL1000 |
| Central Wavelength (nm) |
650 |
660 |
660 |
| Light Source |
Class 3A laser diode |
Class 3B laser diode |
Class 3B laser diode |
| Fiber Compatibility |
Multimode and single mode |
| Output Power (mw) |
>0.5 (-3dBm) |
> 5 |
>10 |
| Detection Distance (km) |
6 |
10 |
12 |
| Fiber Compatibility |
Multimode and single mode |
| Output Port |
Universal adaptor for connectors with 2.5mm ferrules;
Hybrid adaptor (SUN-VFL-AD) for transforming 2.5mm ferrule (FC/SC/ST) to 1.25mm ferrule (LC/MU) |
| Output Mode |
Continuous or flashing (2-3Hz) |
| Spectral Width (nm) |
< 10 |
| Power Supply |
Battery: 2 x 1.5V AAA Alkaline |
| Battery Operation Time(hrs) |
40 (typical in coninuous mode) |
8 (typical in continuous mode) |
8 (typical in continuous mode) |
| Operation Temp. (°C) |
<0 ~ +40 |
| Storage Temp. (°C) |
-20 ~ +60 |
| Operation Humidity |
0 ~ +95% RH (non-condensing) |
| Storage Humidity |
0 ~ +95% RH (non-condensing) |
| Dimensions (mm) |
Φ13.5 x 170 |
| Weight (g) |
88 (including battery) |
| Low Battery Indicator |
The Status LED will turn to red when batteries are low |
Ordering Information:
| Part No. |
Descriptions |
| SUN-VFL250 |
Detection Distance 6km, universal adaptor for connectors with 2.5mm
ferrules (FC/SC/ST) and battery power supply |
| SUN-VFL1000 |
Detection Distance 12km, universal adaptor for connectors with 2.5mm
ferrules (FC/SC/ST) and battery power supply |
| SUN-VFL1000S |
Detection Distance 10km, universal adaptor for connectors with 2.5mm
ferrules (FC/SC/ST) and battery power supply |
| SUN-VFL-AD |
Hybrid adaptor for transforming 2.5mm ferrule (FC/SC/ST) to 1.25mm
ferrule (LC/MU). |
 |
Figure-2 Pen-design Visual Fault Locator and adaptor
(SUN-VFL250 and SUN-VFL-AD) |
Handheld Visual Fault Locator Top
Figure-3 Handheld Visual Fault Locator
(SUN-VFL255-H)
SUN Telecom's SUN-VFL255-H Series Handheld Visual Fault Locator (VFL) is designed for troubleshooting of both single mode and multi-mode fiber optic cables. The light emitted from the VFL is easy to escape from the micro-bending, cuttings or breaks through the jacketed fibers, as well as poorly mated connectors. What's more, this Visual Fault Locator is an excellent complement of OTDR; it is easily to detect faults that OTDR is not able to.
- Features:
-
- Troubleshooting fiber cables up to 5 km
- Visible red laser source
- FC adapter or 2.5mm universal
- Compact size and light weight, suitable for field testing
- High-performance and cost-effective
- Applications:
-
- Maintenance in Telecom
- Maintenance in CATV
- Test Lab of optical fibers
- Other fiber optic measurements
Specifications:
| Parameters |
Specifications |
| Wavelength (nm) |
650 ± 10 |
| Output Power (mW) |
1 |
| Modulation |
CW, 2Hz (Modulation can be customized) |
| Spectral Width (nm) |
≤l5 |
| Recharge Time (hrs) |
3 |
| Battery Operation Time (hrs) |
30 |
| Optical Adapter |
FC/ Universal 2.5mm |
| Operation Temp. (°C) |
-10 ~ +60 |
Storage Temp. (°C) |
-25 ~ +70 |
| Power Supply |
Two 1.5V AA Ni-MH batteries (rechargeable) |
| Dimensions (mm) |
100 x 50 x 20 |
| Weight (g) |
50 |
Standard Package:
Visual Fault Locator, Instruction Manual, Cotton Tampon, and Protective Holster.
Ordering Information:
| Part No. |
Output Power |
| SUN-VFL2550-HA |
1mW |
| SUN-VFL2550-HB |
3mW |
| SUN-VFL2550-HC |
5mW |
| SUN-VFL2550-HD |
10mW |
Other Related Fiber Optic Test Equipment Please Click Here
Note: For the necessity of improvement, the material contained in this document is subject to change without notice.