pyranometer


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pyranometer

(pĭr'ənŏm`ətər), actinometeractinometer
, instrument used to measure the heating power of radiation. Actinometers are used chiefly in meteorology to measure solar radiation as transmitted directly by the sun, scattered by the atmosphere, or reflected by the earth.
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 used to measure the total radiation incident on a surface.

Pyranometer

 

an instrument for measuring the total and scattered solar radiation incident on a horizontal surface. To measure just scattered radiation, a screen is used to shade the instrument from direct sun rays.

Figure 1. lanishevskii pyranometer (external view)

In the USSR the pyranometer designed by lu. D. lanishevskii (see Figure 1) is extensively used. The radiation detector in a lanishevskii pyranometer is a thermopile consisting of series-connected manganin and constantan strips. The even-numbered junctions of the thermopile are covered with carbon black, and the odd-numbered with magnesia alba. Solar radiation is absorbed to a greater extent by the carbon black than by the magnesia. For this reason, a temperature difference arises between the junctions, and a thermoelectric current proportional to the incident radiation is generated. This current is measured by a galvanometer. A glass cap protects the thermopile from the effects of atmospheric infrared radiation, wind, and precipitation. In order to obtain the absolute values of the radiation, pyranometer is checked against an absolute pyrheliometer.

REFERENCE

lanishevskii, lu. D. Aktinometricheskie pribory i melody nabliudenii. Leningrad, 1957.

T. V. EVNEVICH

pyranometer

[¦pir·ə′näm·əd·ər]
(engineering)
An instrument used to measure the combined intensity of incoming direct solar radiation and diffuse sky radiation; compares heating produced by the radiation on blackened metal strips with that produced by an electric current. Also known as solarimeter.
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Device Specification Precision Power sensor WBI021S91 (Weibo, China) 0.5% Pyranometer TQB-2 (Sunlight, China) [less than or equal to] 2% Thermocouple 0.2 mm T-type [+ or -]0.2[degrees]C (USTC, China) Data collection 34970A (Agilent, USA) / Pressure sensor P3308 (Germany) [less than or equal to] 0.5% of FS Table 3: Experimental RMEs of all variables.
Solar radiation (SR), measured by the pyranometer at the hydrometeorological buoy anchored in the Dead Sea, is represented by the numbers at any specified time moment.
This silicon pyranometer smart sensor is designed to work with the HOBO[R] Weather Station Logger via its plug-in modular connector.
The station is used for online monitoring of several meteorological parameters: temperature and relative humidity (thermometer-hygrometer LB-710R (LAB-EL), with temperature sensor Pt-1000), horizontal component of wind speed (meter LB-746 (LAB-EL)), intensity of solar radiation (meter LB-900 (LAB-EL), equipped with a microprocessor-based measuring system, and external pyranometer CM-21 (Kipp & Zonen, Delft, the Netherlands)).
The RB-WS station by Ranch Systems comes equipped with temperature and relative humidity sensors in a radiation shield, wind speed and direction sensors, rain gauge and a pyranometer to measure solar radiation.
Silicon Pyranometer Smart Sensor (S-LIB-M003) Manual [interaktyvus], [ziureta 2016 m.
Nwankwo S., Nnabuchi, M., Global solar radiation measurement in AbakalikiEbonyi State Nigeria using locally made pyranometer, International Journal of Research, e-ISSN: 2348-6848, (en linea), 2(4), 566-573, 2015.
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2 also shows that, there is a mini PV module calibrated with a pyranometer to measure solar radiation.
edu/vdv) using a pyranometer (LI200X, Campbell Scientific, Logan, UT) and quantum sensor (LICOR, Lincoln, Nebraska), respectively.
The incidence solar intensity was measured with a silicon pyranometer solar radiation sensor within a wavelength range of 280-300 nm at 5 min intervals.