RA01 Total Global Radiometer Applications Agrometeorology (evapo-transpiration) Climatology (global energy balance) Highway Safety (road surface temperature) Material Testing (insulation efficiency & material degradation) Note: Above applications are inclusive of, but not limited to the entire RA01 application range.
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The RA01 is a research grade two-component total global radiometer, intended for global energy balance studies. The instrument incorporates two separate sensors for measuring either global or surface reflected short-wave (SW) solar irradiance, and the down or up-welling far infrared long-wave (LW) radiation components, depending on instrument mounting orientation.

In conjunction with short-wave albedo estimates and surface temperature, the RA01 is also suitable for net radiation estimation; the advantage of this approach is reduced instrument cost compared to higher cost four-component net radiometer models. The design of the RA01 incorporates one ISO Second Class pyranometer and one FIR pyrgeometer, for measuring either incoming global short-wave solar and down-welling FIR long-wave radiation, or surface reflected short-wave solar and up-welling FIR long-wave radiation if mounted in the downward/inverted orientation. Employing entirely passive thermopile-based sensing technology, the RA01 generates two low level DC millivolt output signals proportional to the incoming, or outgoing, short-wave solar and FIR long-wave radiative flux. A PT100 RTD temperature sensor is integrated into the radiometer housing for accurate calculation of the sky and surface temperatures. The RA01 also incorporates an integrated heating element which can be cycled on for dew and frost deposition prevention (for improved LW measurement accuracy under adverse climate conditions). The RA01 signal cables can be easily installed and replaced by the user.