NEXTORCH K33 UV Pen Light User Manual

1. Introduction

The NEXTORCH K33 UV Pen Light is a high-performance, rechargeable ultraviolet flashlight designed for a wide range of professional and personal applications. Featuring a pure 365 nm UV light source and a black glass filter, it provides strong penetration and clear fluorescence observation, enhancing detection accuracy. Its robust aluminum alloy construction ensures durability, while its compact design offers portability and ease of use.

Figure 1: NEXTORCH K33 UV Pen Light

2. Important Safety Precautions

Please read and understand all safety information before using the NEXTORCH K33 UV Pen Light. Improper use can result in injury or damage to the device.

• Eye Protection: Avoid direct exposure of UV light to eyes. UV light can be harmful to vision. Do not shine the light directly into anyone's eyes.
• Children: Keep the device out of reach of children.
• Disassembly: Do not attempt to disassemble, incinerate, or heat the battery above 60°C (140°F).
• Battery Safety: If the battery expands, stop using it. Do not swallow the battery.
• Proper Use: Use the flashlight only for its intended purposes as described in this manual.

3. Setup

3.1 Battery Installation

The K33 UV Pen Light supports both the included 10880 Li-ion rechargeable battery and two standard AAA alkaline batteries. For optimal performance and rechargeability, use the provided 10880 Li-ion battery.

1. Unscrew the tail cap of the flashlight.
2. Insert the 10880 Li-ion battery with the positive (+) end facing towards the head of the flashlight. If using AAA batteries, ensure correct polarity as indicated inside the battery compartment.
3. Screw the tail cap back on securely.

Figure 2: Battery Compartment and Dual Power Solution

3.2 Charging the Battery

The included 10880 Li-ion battery features a direct USB-C charging port. Use the provided USB-C charging cable to recharge the battery.

1. Remove the 10880 Li-ion battery from the flashlight.
2. Connect the USB-C end of the charging cable to the port on the battery.
3. Connect the USB-A end of the cable to a compatible USB power source (e.g., computer, wall adapter).
4. The battery will indicate charging status (refer to battery's specific indicator if available).

4. Operating Instructions

4.1 Power On/Off and Mode Switching

The K33 UV Pen Light features a tail-press anti-slip switch for intuitive control.

• Momentary On: Half-press the tail switch to activate the light momentarily. Release to turn off.
• Constant On: Fully press the tail switch until it clicks to turn the light on constantly. Press again to turn off.
• Mode Switching (Method 1 - From Off State): Half-press continuously to preview the available modes (High Brightness, Low Brightness). Fully press the switch to lock the current mode.
• Mode Switching (Method 2 - In Constant Light State): While the light is on, fully press the switch continuously within 2 seconds to cycle through the modes.

Figure 3: Tail-press Anti-slip Switch and Mode Operation

5. Applications

The K33 UV Pen Light's pure 365 nm UV output and black glass filter make it highly effective for various detection and inspection tasks:

5.1 Document Inspection & Authenticity Identification

Helps identify fake documents, counterfeit currency, and other items by revealing security features that fluoresce under UV light. Widely used for authenticating jade, amber, bills, and commemorative banknotes.

Figure 4: Document Inspection and Evidence Collection

Figure 5: Authenticity Identification, Hygiene Inspection, and Pet Health Management

5.2 Evidence Collection

Collect hidden evidence such as fingerprints, liquids, and other traces during on-site surveys that are not visible to the naked eye but fluoresce under UV light.

5.3 Hygiene Inspection

Easily judge the cleanliness of your home, hotel rooms, or other environments by revealing mold, stains, and other biological residues that emit bright fluorescence under UV light.

5.4 Pet Health Management & Excrement Detection

Regularly check the skin condition of pets to detect potential fungal infections (ringworm) which fluoresce. Also effective for detecting pet urine stains on carpets or furniture, as cat urine will show a fluorescent reaction.

5.5 Resin Curing

The powerful 1300 mW UV light source is suitable for curing UV-sensitive resins, making it useful for various craft and repair applications.

6. Maintenance

• Cleaning: Clean the flashlight body with a soft, damp cloth. Ensure the lens is free of dust and debris for optimal light output.
• Waterproof & Drop-proof: The K33 UV Pen Light is IPX7 waterproof (1 meter) and 1 meter drop-proof, ensuring stable performance in unexpected situations. However, avoid prolonged submersion or intentional drops from excessive heights.
• Storage: Store the flashlight in a cool, dry place when not in use. If storing for extended periods, remove the battery to prevent leakage.

Figure 6: Waterproof and Impact-Resistant Design

7. Troubleshooting Guide

8. Product Specifications

Note: Above tested specifications are strictly based on the standard of ANSI / PLATO-FL1. We tested it with one 10880 (650 mAh) Li-ion rechargeable battery and two AAA alkaline batteries in 23°C ± 3°C. Specifications might be different when using a different battery or testing in a different environment.

9. Warranty and Customer Support

NEXTORCH offers a five-year warranty on all flashlights. If you have any questions about the product, require technical assistance, or need to make a warranty claim, please feel free to contact NEXTORCH USA customer support. Refer to the contact information provided with your purchase or visit the official NEXTORCH website for details.