["The LS122 Infrared Power meter is used for measuring the optical power density of infrared ray and automatically calculate the IR transmission value.\r\n\r\nFeature\r\n1. IR transmission meter, IR power meter, two function in ONE device\r\n2. Evaluating heat-insulating property of the tint of for windows, solar films, glass and other transparent materials\r\n3. Measuring optical power density of infrared ray, wavelength response (1000nm-1700nm), gives visual and reliable result \r\n\r\nApplication\r\n1.Infrared barrier properties of building/car insulation film and heat insulation glass\r\n2.Irradiation intensity of infrared light source (solar,infrared light,etc.)\r\n3.Thermal performance of solar energy equipment\r\n\r\nParameter\r\nIrradiance measuring range: 0 --- 40000 for W / m2\r\nAccuracy: ± 10%\r\nIR rejection rate: -999 --- \r\nSpectral range: λ (1000-1700 nm); λp = 1400 nm\r\nDetector Diameter: ¢ 10mm\r\nDimensions: 125mm × 69mm × 24.5mm (L × for W × H)\r\nWeight: around 140 grams (including battery)\r\nOperating temperature: -20 ° C --- + 70 ° C\r\nPower supply: 4 pieces of AAA alkaline batteries (Not include)\r\n\r\nPackage include:\r\n1pcs LS122 IR Power Meter\r\n1pcs User Manual\r\n1pcs Certificate / warranty card"]