TM206 Handheld Digital Solar Power Meter is compact, rugged and easy-tooperate precision instrument used to measure solar radiation. This is a highly effective device in measuring the efficiency of installing solar power devices. A solar power meter device is most commonly used for a variety of applications where overall energy, efficiency, and placement of solar systems need to be calculated: Solar power researchIdentifying high-performance opportunitiesPhysics or optical laboratoriesSolar radiation measurementAgricultural applicationsMeteorological applications Typically within ± 10W/m2 [±3 BTU/ (ft2*h)] or ±5% whichever is greater in sunlight Additional temperature included error ± 0.38 W/m2 / °C [±0.12 BTU/ (ft2*h)] / °C] from 25 °C Display: 3 - 1/2 digits LCD with maximum reading 1999Range: 1999 W/m2, 634 BTU/(ft2*h) Battery Life: approx. 100 hoursBattery: 1 x 9V Battery (included)With Low battery indicator High Precision Measure light sources including all visible lightDisplay: 3 - 1/2 digits LCD with maximum reading 1999Range: 1999 W/m2, 634 BTU/(ft2*h)