TM-207 Solar Power meter is ideal for the measurement of the solar radiation that is emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy.
The spectrum of solar radiation is close to that of a black body with a temperature of about 5800 K. About half of the radiation is in the visible short-wave part of the electromagnetic spectrum. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum.

The units of measure are Watts per square meter or BTU, the typical test and measuring applications are:

Specifications:

Display	3½ digits, 2000 readings
Range	2000 W/m2, 634BTU / (ft2xh)
Resolution	0.1 W/m2, 0.1 BTU/ (ft2xh)
Accuracy	Accuracy:Typically within ±10W/m2 [±3 BTU/ (ft2xh)] or ±5%  whichever is greater in sunlight. Temperature included error ±0.38 W/m2 / ºC  [±0.12 BTU/ (ft2xh)] / ºC] deviation from 25 ºC.
Angular accuracy	Cosine corrected
Drift	< ±2% per year
Over-input	Display "OL"
Sampling time	0.25 second
Operating Temp. and Humidity	0ºC ~ 50ºC below 80% RH
Power supply	9V battery  x 1pc.
Sensor wire length	Approx. 1.5M
Size	130x 55x 39mm(LxWxH)
Weight	About 150g.

Accessories:

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