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LS123 UV power meter is an UV power measuring instrument, which is used for measuring the UV radiation luminance. Its unit is micro Watt persquare centimeter (uW/m2). The instrument is also used for the UV transmittance measurement. Features: 1.Detector at the top 2.Press "0%" key directly converts UV Rejection data 3.Press "HOLD" key lock data 4.Used to test the UV power intensity in the UV light source or in the sun Specifications: Irradiance measuring range: 0 -40000 uW /cm2 Accuracy: ± 10% Relative intensity: 0 - 9999% Spectral range: λ (260-400nm); λp = 365 nm Detector Diameter: 10mm Dimensions: 125mm × 69mm × 24.5mm (L× W × H) Weight: around 140 grams (including battery) Operating temperature: -20 ° C --- +70 ° C Power supply: 4 pieces of AAA alkaline batteries (package without battery) Package include 1pcs LS123 UV Power Meter 1pcs User Manual 1pcs Certificate / warranty card