à¤Ã×èͧÇÑ´áʧÍÒ·ÔµÂì Solar Power Meter ªèǧ¡ÒÃÇÑ´ 2000 W/m2, 634BTU / (ft2xh) ÃØè¹ TM-207 Brand TENMARS à¤Ã×èͧÇÑ´áʧÍÒ·ÔµÂì TM-207 Solar Power Meter Description: 3½ digits LCD display with maximum reading of 2000. External sensor. Measuring the Solar radiation emitted by the sun. Display units: W/m2 (Watts per square meter) or BTU. Data Hold/ MAX/MIN functions. 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: Meteorology applications Agriculture applications Physics and optical laboratories Solar radiation measurement. Solar transmission measurement Solar power research Identify high performance windows Helpful to set up Solar PV Panels at optimum angles of incidence Light Intensity Measurement for the car windows 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 OperatingTemp. and Humidity 0C ~ 50ºC below 80% RH Power supply: 9V battery x1 Sensor wire length : Approx. 1.5M Size:130x 55x 39mm(LxWxH). Weight: About 150g. Solar Meter Solar Power Meter TM-207 à¤Ã×èͧÇÑ´áʧ à¤Ã×èͧÇÑ´áʧÍÒ·ÔµÂì