Frequently Asked Questions Nichia UV-LED (φ31 x 93mm) KONTEC PW-UV943H-04:

1/ What is the KONTEC PW-UV943H-04?

The PW-UV943H-04 is a pen-style ultraviolet inspection light featuring nine Nichia UV-LEDs. It measures 31mm in diameter and 93mm in length, housed in a durable aluminum shell for handheld use.

2/ What wavelength does it emit?

This UV-LED model emits a peak wavelength of 375nm, optimized for strong fluorescence with minimal visible light leakage.

3/ How is it powered?

It runs on three AAA alkaline batteries (not included). A full set provides approximately five hours of continuous operation at full output.

4/ Is there any warm-up time?

No. The PW-UV943H-04 reaches 100% output instantly when switched on. There’s no delay or warm-up period required.

5/ How do I replace the batteries?

- Unscrew the tail cap.

- Remove spent batteries.

- Insert three fresh AAA cells, matching polarity markings.

- Screw the tail cap back on until snug.

6/ What beam pattern does it produce?

The nine LEDs produce a fairly uniform circular beam about 20 - 30mm in diameter at close range, ideal for pinpoint inspections.

7/ What are typical uses for this UV light?

- Forensic evidence and document authentication

- Leak detection in plumbing or HVAC systems

- Inspection of UV-curable resins and coatings

- Fluorescent dye checks in biology and chemistry labs

8/ Can it cure UV-curable adhesives?

It can verify fluorescence or pre-test UV curable materials, but for full curing you may need a higher-power UV source specified for that resin’s peak wavelength.

9/ How do I clean the lenses?

Use a soft, lint-free cloth lightly moistened with isopropyl alcohol. Gently wipe the LED window and allow it to air dry before use.

10/ What safety precautions should I take?

- Wear UV-blocking safety glasses to protect eyes.

- Avoid direct skin exposure for extended periods.

- Do not look directly into the LEDs when powered on.

11/ The light is dim - what should I check?

- Replace batteries with fresh, high-quality alkaline cells.

- Ensure battery polarity is correct.

- Inspect the LED window for dirt or smudges and clean if needed.

12/ The LEDs won’t turn on - what can I do?

- Verify batteries are installed correctly.

- Check for corrosion or debris in the battery compartment.

- Tighten the tail cap to ensure proper electrical contact.

13/ Where can I buy the PW-UV943H-04?

Please contact QTE Technologies (qtetech.com/en) for best price.

QTE Technologies is a proud global MRO provider, serving customers in over 180 countries and always striving to ensure a complete and satisfying customer experience. Established in 2010, we supply over 1 million products for every industry and technology. Additionally, you can reach us anytime via 24×7 chat support, phone, WhatsApp or email. Discover what our valued customers have to say about our services on our dedicated review page. 

14/ Is there a warranty?

The warranty period is 12 months from the date QTE TECHNOLOGIES dispatches the goods: https://qtetech.com/en/warranty-policy 

15/ Who do I contact for technical support?

For product support, please email: [email protected]