DESCRIPTION
The B5 Rechargeable Red Light Pen is a professional 650nm visual fault locator designed for fiber optic network maintenance, installation, and troubleshooting. Its advanced rotary automatic lift laser head ensures smooth operation, while the integrated LED lighting improves visibility in low-light conditions. With its rechargeable 18650 lithium battery, this tool guarantees an extended working time, making it ideal for field engineers and fiber network technicians.
Product Specifications
| Specification | Details |
| Output Power | 5mW / 15mW / 20mW / 30mW (Model Dependent) |
| Output Wavelength | 650nm |
| Interface Type | 2.5mm Universal Adapter |
| Battery Type | 18650 Lithium Battery |
| Battery Capacity | 1800mAh |
| Charging Current | ≤600mA |
| Charging Time | ≤5 Hours |
| Endurance Time | ≥40 Hours (5mW Model) / ≥12 Hours (15mW Model) / ≥11 Hours (20mW Model) |
| Operating Temperature | -20°C to +60°C (No Condensation) |
| Storage Temperature | -40°C to +85°C |
| Product Size | 133*30mm (B5) / 134*24mm (B5S) |
| Product Weight | 112g (B5) / 101g (B5S) |
Selection Notes
Typically selected when field troubleshooting needs a visible 650 nm locator with quick mode switching and a retractable/rotary head mechanism to reduce accidental exposure or damage during handling and transport.
May not be appropriate for sites where daily work is mainly LC interfaces (adapter workflow becomes a dependency) or where shared work areas enforce stricter laser-use rules that make open-light fault checking impractical.
Feature Details
- Power On/Off & Laser Head Control: Turn the rotary button clockwise to lift the laser head and activate the device. Turn counterclockwise to retract and turn off.
- Lighting Function: Press and hold the bright button for 2 seconds to toggle LED lighting.
- Status Switching: Hold the bright button for 2 seconds to switch between ON (constant 650nm red light), Flashing (650nm pulsing light), and OFF.
- Reset Function: Press and hold the bright button for 6 seconds to restore factory settings.
Application Details
- Used in fiber optic maintenance, network troubleshooting, and optical device research
- Ideal for FTTH, FTTB, and FTTX fiber installations
- Helps detect fiber breaks, bends, and connection faults
- Useful in server rooms, dark environments, and outdoor conditions
Charging Function
- When the battery is low, the last frame of the power indicator blinks continuously before shutdown—please charge immediately.
- USB charging port as standard. If only one battery indicator light is on, charging is required.
- During charging, the power indicator flashes. Once fully charged, all four power indicator cells light up.
Troubleshooting & Maintenance
Precautions
- Avoid direct eye exposureto the laser
- Higher temperature shortens laser lifespan—use in moderate conditions
- Clean with a special fiber optic cleaning swab
- Do not open the housing—unauthorized repairs void the warranty
FAQ
Q1: Is the B5 VFL rechargeable?
Yes, it is rechargeable and uses an 18650 lithium battery.
Q2: What is the typical output power?
Output power options are 5mW, 15mW, 20mW, or 30mW (model dependent).
Q3: What connectors does it support?
Universal 2.5mm interface fits SC, FC, ST; LC requires an adapter.
Q4: What is the detection distance?
Up to 10–20 km depending on fiber quality.
Q5: What modes are available?
Continuous and flashing laser modes.
Q6: Is it suitable for outdoor/field testing?
Yes, designed with a durable metal housing.
Q7: Does it detect microbends?
Yes, visible red leakage indicates bends and breaks.
