UV Meter LS128 for UV LED Light Sources Measure Energy, Power and Temperature



Introducing the LS128, a state-of-the-art UV energy meter expertly crafted for professional testing of UV LED light sources. This device features a robust spectral response range of 340nm to 420nm, making it ideal for assessing UV LED lamps across multiple wavelengths including 365nm, 375nm, 385nm, 395nm, and 405nm.

Versatile Measurement Capabilities: Simultaneously measures energy, power, and temperature with real-time display of power and temperature curves.

Enhanced Data Management: Comes with complimentary computer software that allows for detailed data reading and test report generation.

High Capacity Design: Features an ultra-large measurement range, capable of measuring power up to 40,000mW/cm².

Designed for precision and ease of use, the LS128 UV Energy Meter is your go-to tool for comprehensive analysis of UV LED light sources, ensuring your applications meet the highest standards of performance.


1. Wide spectral response range for testing UV LED sources with peaks in any band from 365nm-405nm.

2. Simultaneous measurement of energy value, power value and temperature.

3. Display power and temperature curves to analyze the distribution of temperature and luminous intensity.

4. High-speed data acquisition of 2048 times/sec, more accurate measurement.

5. Ultra-large range design, power can be measured up to 40,000mW/cm².

6. Built-in timer to accurately record the length of UV curing time.

7. Support computer software for reading detailed recorded data and generating test reports.

8. Switching between manual and auto mode is possible according to different testing environments.


1. Application: Light intensity, energy and temperature measurement of UV LED light sources

2. Spectral range: 340nm - 420nm, calibrated at 395nm UV LED light sources

3. Irradiance measuring range: 0 - 40000 mW/cm²

4. Irradiance resolution: 1 mW/cm²

5. Energy measuring range: 0 - 999999 mJ/cm²

6. Energy measuring accuracy: ± 10% , ± 5% (typical)

7. Temperature measuring range: -55°C -125°C

8. Sampling speed: 2048 times/second

9. Irradiance data storage interval: 32 times/second

10. Temperature data storage interval: 2 times/second

11. Recording period: 32 min

12. Power supply: 2 AAA alkaline dry batteries

13. Display: 240*160 Dot matrix LCD

14. Test Hole Diameter: Φ10mm

15. Dimension: Diameter 120mm * Thickness 13mm

16. Weight: 327g

Packing List

1. LS128 UV Energy Meter *1

2. USB cable *1

3. USB disk *1

4. Antistatic gloves *1

5. Cross head screw-driver *1

6. User manual *1

7. Certificate/Warranty card *1

Free Shipping

Under normal circumstances we offer free shipping on all orders, you will see the free shipping option in your cart at checkout. There is no choice of carrier for free shipping, but typically we will ship your order will likely ship using either USPS or FedEx. Full Shipping Policy

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.). Full Returns Policy

When Will My Order Ship?

For Standard Shipping, we aim to pack and ship out your order within 3 business days. During special periods, such as heavy order processing or local inventory shortages that require deployment, please expect it to take an additional day or two for processing.
We ship five days a week, Monday through Friday. Sometimes our mail pickup comes in early afternoon, so tracking for orders shipped later that day may not update until the following business day.
You will receive a shipment confirmation with tracking information via email when your order has shipped. Once you receive this email, we cannot change or cancel your order.

Can I Change The Shipping Address On My Order?

Please contact us immediately via email if you realize that you gave us the wrong shipping address — if it hasn't shipped yet, we might be able to correct it before it goes out the door.
If your order ships to the address provided and is returned to us as undeliverable, then you are responsible for paying the cost of shipping again to resend it to you. If you decide you do not want your order reshipped, we'll refund you for the products less the original shipping charges, once your order returns to our warehouse. We'll reach out to you to coordinate your options before re-shipping.
If your order ships to an incorrect address provided at the time the order is placed and is not retrievable, we are not responsible and cannot offer reimbursement.

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UV Meter LS128 for UV LED Light Sources Measure Energy, Power and Temperature
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