LS123 UV power meter is mainly used for the measurement of UV blocking rate of materials, applicable to explosion-proof film, solar film, heat-insulating glass and other materials. It can also be used to measure the power density of UV radiation energy in light sources. The detector is located at the top of the instrument for quick and easy use. Wide response to test UV intensity from 260nm-380nm wavelengths. 1. Powerrange: 0-40000 W / cm 2. Measurement accuracy: H Less than 50W/cm:5W/cm,H equal 50W/cm:10%H 3. Ultraviolet rejection rate: -999%-100% 4. response: 260nm-380nm, p=365nm 5. Photosensitive aperture: 10mm 6. Working temperature: -20C- 70C 7. Power supply: AAA alkaline dry batteries Color: As Shown Material: plastic Package Contents: 1 x Uv Power Meter(The words on the product due to different batches, but it not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.