Weltool M2-BF 365nm UV Black Light Flashlight
The Weltool M2-BF "Purple Beard" (WEL-M2BF) is a professional-grade 365nm UV-A black light flashlight built for true fluorescence detection. With a focused pure UV beam, up to 2100mW of LED radiant flux, a black filter-glass lens, and a rugged aerospace-aluminum body, this ultraviolet flashlight excels at forensics, non-destructive testing (NDT), leak detection, mineral and ore hunting, hygiene inspection, and outdoor scorpion and mineral exploration.
Highlights
-
True 365nm UV-A LED – far more effective for fluorescence than common 395nm blacklight flashlights
-
Two radiant-flux modes – 630mW low and 2100mW high for close inspection or wide coverage
-
Black filter-glass lens filters visible light beyond 365nm for a purer UV beam
-
18650 rechargeable platform with reverse-polarity, over-discharge protection and low-voltage warning
-
IP67 waterproof and 1 meter impact resistant for demanding jobsites
-
Fully regulated output – no PWM, no flicker, no preheat required
Output & Runtime Chart
| Mode |
Output |
Beam / Wavelength |
Runtime |
| Low |
630mW radiant flux |
365nm UV-A, focused pure beam |
10 h 25 min |
| High |
2100mW radiant flux |
365nm UV-A, focused pure beam |
4 h 20 min |
Runtime tested with a Weltool UB18-35 rechargeable lithium battery, measured until radiosity falls to 10%.
Specifications
| Emitter |
High-efficiency UV-A LED, peak wavelength 365nm (~1,000 hr lifetime) |
| UV output |
630mW (low) / 2100mW (high) LED radiant flux |
| Spectral radiosity @38cm |
5,900μW/cm² (low) / 15,500μW/cm² (high) |
| Battery |
1 × 18650 rechargeable Li-ion |
| Charging |
Charged externally by charger (not built-in) |
| Switch |
Tail-cap switch, rated up to 50,000 presses |
| Waterproof |
IP67, O-ring sealed; 1 meter impact resistance |
| Lens |
Black filter glass; purple oxidized aluminum bezel |
| Dimensions |
27.5mm bezel × 23mm body × 135mm length |
| Weight |
80.5 g (without battery) |
| Finish |
Aerospace aluminum alloy, black anodized |
What's in the Box
- Weltool M2-BF 365nm UV flashlight
- Steel pocket clip
- Spare O-ring
- Owner's manual
Frequently Asked Questions
What wavelength is the Weltool M2-BF, and why does 365nm matter?
The Weltool M2-BF (WEL-M2BF) emits true 365nm UV-A light. 365nm produces cleaner, stronger fluorescence with far less visible violet glow than cheaper 395nm lights, so targets pop with higher contrast – making the Weltool M2-BF ideal for professional detection work.
What can the Weltool M2-BF detect?
The Weltool M2-BF (WEL-M2BF) reveals scorpions, pet urine and stains, coolant and refrigerant leaks (with dye), minerals and gems, body fluids and fingerprints in forensics, and security features on counterfeit currency and documents.
Is the Weltool M2-BF a real black light?
Yes – the Weltool M2-BF (WEL-M2BF) is a professional 365nm UV-A black light with a filter-glass lens, delivering far better fluorescence performance than common 395nm blacklight flashlights.
Is the Weltool M2-BF safe, and do I need eye protection?
The Weltool M2-BF (WEL-M2BF) is intended for professional use. Never shine it at eyes or skin for long periods, avoid reflective surfaces, and wear professional UV-protective glasses. Keep the Weltool M2-BF away from children.
What battery and runtime does the Weltool M2-BF have?
The Weltool M2-BF (WEL-M2BF) runs on one 18650 rechargeable Li-ion battery, delivering about 10 hours 25 minutes on low and 4 hours 20 minutes on high.
Is the Weltool M2-BF waterproof and rugged?
Yes – the Weltool M2-BF (WEL-M2BF) is IP67 waterproof, O-ring sealed, and rated for 1 meter impact resistance in an aerospace-aluminum body.
What is a UV flashlight like the Weltool M2-BF used for?
The Weltool M2-BF (WEL-M2BF) is used for forensics, NDT, leak detection, mineral and ore screening, UV curing, hygiene inspection, and outdoor exploration such as scorpion hunting.
Where can I buy the Weltool M2-BF?
You can buy the Weltool M2-BF (WEL-M2BF) at Going Gear, an authorized Weltool dealer.
