395nm UV Blacklight Flashlight | USB Rechargeable, Waterproof

ESMARTER 395nm UV Blacklight Flashlight – Rechargeable & Waterproof

Illuminate what the naked eye can't see with the ESMARTER K31 395nm UV Blacklight Flashlight. Whether you're tracking down hidden pet stains, curing UV resin, checking fluorescent markings, or verifying currency authenticity, this compact and powerful ultraviolet torch delivers a bright 250-lumen output across a 50–100 metre range — all from a sleek, rechargeable aluminum alloy body.

Key Features

• 395nm Ultraviolet Wavelength: The ideal UV frequency for detecting pet urine stains, curing UV resin, authenticating documents, and revealing fluorescent residues invisible under normal light.
• Powerful 250-Lumen Output: A high-output 10W LED delivers strong, even UV illumination with an effective range of 50–100 metres.
• USB Rechargeable – Battery Included: Built-in rechargeable battery charges conveniently via USB — no more hunting for replacement batteries. Simply plug in and recharge.
• Waterproof Construction: Rated waterproof for confident use outdoors in wet or unpredictable weather conditions.
• Durable Aluminum Alloy Body: Lightweight yet rugged, the aircraft-grade aluminum alloy housing resists everyday wear, drops, and corrosion for long-lasting performance.
• CE & RoHS Certified: Meets European safety and environmental compliance standards for peace of mind.
• Compact & Portable: Slim, pocket-friendly design makes it easy to carry for home use, travel, outdoor adventures, and professional tasks.

Perfect For

• 🐾 Pet Urine & Stain Detection – Quickly locate hidden pet accidents on carpets, upholstery, and hard floors.
• 🔧 UV Resin Curing – Efficiently cure UV-reactive resins for crafts, jewelry, and repairs.
• 💵 Currency & Document Authentication – Verify security markings on banknotes and official documents.
• 🔍 Fluorescent Dye Tracing – Trace leaks and check for contamination in HVAC and plumbing systems.
• 🎨 Craft & Art Projects – Ideal for UV-reactive paint, glow-in-the-dark effects, and art installations.
• 🏕️ Outdoor & Camping – Reliable waterproof torch for nighttime outdoor activities.

Specifications

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For more information on UV light safety and best practices, visit the FDA's guide on Ultraviolet (UV) Radiation.

Frequently Asked Questions

Q: What wavelength does this UV flashlight emit, and why does it matter?

A: This UV flashlight emits light at 395nm, which sits at the near-UV/visible-light boundary. This wavelength is highly effective for causing fluorescent substances — such as pet urine, adhesives, and security markings — to glow visibly, while being safe for general handling use. It is also the recommended wavelength for curing many UV-reactive resins.

Q: How do I charge the ESMARTER K31 UV flashlight?

A: The K31 features a built-in rechargeable battery that charges via a standard USB cable (included). Simply connect it to any USB power source — a computer port, wall adapter, or power bank — and it will be ready to use once fully charged. No proprietary charger or replacement batteries are required.

Q: Is this UV flashlight safe to use around pets and children?

A: While 395nm UV light is at the lower end of the UV spectrum and far less intense than direct sunlight UV exposure, it is still advisable to avoid shining it directly into eyes. When used responsibly for scanning surfaces such as floors, carpets, or workbenches, it is safe for household use. Always direct the beam away from people and pets' faces.

Q: Can this flashlight be used outdoors in wet conditions?

A: Yes! The ESMARTER K31 features a waterproof design, making it well suited for outdoor use in rain or damp environments — perfect for garden inspections, camping trips, and outdoor property checks.