RA01
2Pages

Catalog excerpts

Thermal Sensors 2-component radiometer RA01 is a market leading 2-component radiometer, mostly used in scientific-grade energy balance and surface flux studies. It offers 2 separate measurements of solar and longwave radiation. Product features include a modular design, low weight, and easy levelling, and low solar offsets in the longwave measurement. The unique capability to heat the pyrgeometer reduces measurement errors caused by dew deposition. When combined with estimates of solar albedo and of local surface temperature, this instrument can also be used for estimation of net radiation. The advantages of this approach are cost reduction and independence from local surface properties. RA01 measures the 2 incoming components of the surface radiation balance: global solar and downward longwave radiation. The solar radiation sensor is called pyranometer, the longwave sensor is called pyrgeometer. For calculation of sky temperature, it is necessary to compensate for irradiated heat by the pyrgeometer (StefanBoltzmann law). A Pt100 temperature sensor is included in RA01’s ’s body for that purpose. Sunshine duration may be estimated according to the WMO approved pyranometric method. Figure 2 overview of RA01: (1) upward facing pyrgeometer, (2) sun screens, (3,4,7) levelling assembly for x- and y-axis, (5) upward facing pyranometer, (6) instrument body Using RA01 radiometer is easy. It can be connected directly to commonly used data logging systems. The irradiance levels in W/m2 are calculated by dividing the RA01 outputs, small voltages, by the sensitivities. The longwave irradiance should be corrected using the instrument body temperature. The sensitivities of all sensors are provided with RA01 on its product certificate. Copyright by Hukseflux. Version 2028. We reserve the right to change specifications without prior notice Page 1/2. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: info@hukseflux.co

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Thermal Sensors RA01 design RA01 radiometer has a modular design: it is possible to take the instrument apart and replace or re-calibrate individual sensors. A 2-axis levelling assembly is included. The levelling assembly fits a 1 inch NPS tube (the tube’s recommended outer diameter equals 33.4 x 10-3 m). With the RA01 shim, included in RA01’s delivery, a ¾ inch NPS tube may also be used. 1 Figure 3 top view of RA01: (1) levelling assembly for x- and y-axis, (2) cables, (3) mounting tube (not included) energy balance studies surface flux measurements climatological networks Standards...

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RA01 2Pages

Catalog excerpts

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RA01
2Pages