一、Features
　selecable from two units: W/㎡ and Btu
　Peak hold function
　Data hold function
　Measure directly without adjustment
　Steadily measure for a long period
二、Specifications
1.Resolution: 0.1W/m2, 0.1 Btu/（ft2-h）
　Error range: ± 10W/m2 [±3 Btu/（ft2-h）] or ±5% of the measured value Temperature error: ±0.38W/m2 / ℃ [ ±0.12 Btu/（ft2-h）/℃] deviation at 25℃
　Display: 3-3/4LCD display, maximum displayed numerical value 3999
　Shift: <±3% /year
　Overload display “OL”
2.Range: 0.1-399.9 W/m2, 1-3999 W/m2, 0.1-399.9 Btu/（ft2-h）, 1-3999 Btu/（ft2-h）
　Sampling time: 0.5 second
　Operation temperature and humidity: 0°C to 50°C <80%RH
　Storage temperature and humidity: -10°C to 60°C <70%RH
　Dimensions and weight: 132（L） x 60（W） x 38 （H）mm
　Weight: approx. 150g
　Battery needed: 9V battery
　Battery operation life: Approx. 100 hours