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. Power range: 0-40000 W / cm Measurement accuracy: H Less than 50W/cm:5W/cm, H equal 50W/cm:10%H Ultraviolet rejection rate: -999%-100% response: 260nm-380nm, p=365nm Photosensitive aperture: 10mm Weight: about 140 g (including battery) Working temperature: -20C-+ 70C Power supply: AAA alkaline dry batteries" Colour:Photo Color Material:plastic Size:25mmx 69mm x24.5mm (LxWxH) Package Contents: 1 x UV Meter 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.