Solar Power Meter / Pyranometre PYR1307 :

Specifications :

* Operating temperature and relative humidity: 5 deg C to -40 deg C, =< 80%

* Display: 3 1/2 digit LCD with maximum reading of 1999

* Sampling time: about 0.25 sec

* Accuracy: +/- 10 Watt/m2 or +/- 3 BTU/(ft2*h) or 5% whichever is greater

* Battery: three AAA

* Size: 162mm x 63mm x 28mm

* Weight: about 250g