PYR20 pyranometer, or solar Radiation Sensor, measures global radiation of both direct and diffusion of solar irradiance. The internal temperature compensation minimizing the error caused by heating of the sensor. Each sensor is calibrated against Eppley Precision Spectral Pyranometer and offers excellent accuracy and consistency. The sensor is applicable for science research, solar power , greenhouse, weather station etc.Measurement range to 2000W/m2, Spectral range 400-1100nmOutput interface with RS485, Voltage or CurrentTemperature compensatedLevel indicator and spring loaded for installationWater proof to IP66 can be used outdoorHigh accuracy and consistency with excellent stabilityReverse power protection and Built-in TVS/ESD protectionPyr Range : Range:0-2000W/m2, Accuracy 5%, Resolution:1W/m2Spectral Range : 400-1100nmDirection Error : Percent of reading: 3% (0 - 70); 10% (70 - 85)IP Ratings: IP66Operating Temperature : -40~85Installation : Screw hole * 3Colour:blackMaterial:plastictype:4-20mAPackage Contents:1 x SensorOnly 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.