Precision Solar Energy Meter Solar Light Energy Insolation Tester Description: Choose from two units ² and Btu data retention and retention function. This solar energy tester directly measures consumption without adjustment. Constantly measure for a long time. It is suitable for solar energy measurement, solar energy research, meteorology, agriculture, physical and optical experiments. Specification: Material: electronic components Resolution: 0,1 W or m², 0,1 Btu or (ft²-h) Range error: ±10W or m²[±3 Btu or (ft²-h)] or ±5 percent of the measured value Temperature error: ± 0,38 W or m² or °C [± 0,12 bTU or (ft²-h) or °C] at 25°C deviation Display: 4-1 or display Value: 19999 Measuring range: 0,1-1999,9 ² 0,1-1999,9 Btu or (ft²-h) Wavelength Range: 340-1100nm Operating temperature and humidity: 0 to 40° above 80 percent relative humidity Storage temperature and humidity: -10 to 50° than 70 percent RH Power Supply: 9 V Size Chart: Size: 132x60x38mm or 5.20x2.36x1.50 inch The package includes: 1 sztuka solar energy meter 1 sztuka case pack 1-part instruction manual