Since 1910, General Tools has grown to become the recognized industry leader for specialty hand tools and instruments. This digital solar power meter measures solar power in units of watts per square meter or Btu/(ft2 x h) and displays readings on a large 4-digit LCD. It is ideal for checking thermal window efficiency.

• Measurement range: 0 to 2000 W/m2 or 0 to 634 Btu/(ft2 x h)
• Measurement accuracy: ±10 W/m2 (±3 btu/(ft.2 x h)) or ±5% of reading, whichever is greater
• Uses cosine angular correction
• Data hold min/max/avg modes
• Data memory and read function (99 sets)
• Auto power-off function
• Includes tripod mounting screw and a carrying case
• California residents see Prop 65 WARNINGS