... w/m2, 0.1-399.9 Btu,1-3999 Btu Resolution: 0.1w/m2, 0.1 Btu/(ft2-h) Solar Power Meter Model ... ², 1-3999 W/m², 0.1-399.9 Btu/(ft²-h), 1-3999 Btu/(ft²-h)Resolution: 0.1W/m², 0.1 ... Btu/(ft²-h)Error range: ± 10W/m² [±3 Btu/(ft²-h)] or ±5% of the ... measured valueTemperature error: ±0.38W/m² / °C [ ±0.12 Btu/(ft²-h)/°C] deviation at 25°CDisplay: 3-3/4LCD ...