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Phone: +49 (0)8193-93700-0

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Phone: +1-978-462-1818


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This Product is discontinued, please refer to the Alternatives shown below under Similar Products or contact us directly.

Alternative Products for this discontinued product:


UV Spectroradiometer on Sun tracker for direct solar irradiance measurement and TOC determination

  • Precise Sun Tracker with 4 Quadrant Diode for fine alignment
  • Highest stray light reduction for precise TOC determination, evaluated in scientific intercomparisons to Brewer and Dobson
  • Compact size
  • Weather proof
  • Included software
  • Different spectral ranges possible (UV, VIS, NIR)

Accuracy shown in intercomparison measurement campaigns

The BTS-Solar has been compared to Brewer and Dobson in several scientific publications to verify and show the measurement capabilities. These showed an excellent agreement, see, long term intercomparion at DWD (Deutscher Wetterdienst) and International Intercomparion at Izaña Atmospheric Observatory/Teneriffa .

BTS-Solar for TOC and AOD

Measurement system for direct spectral irradiance measurements of solar radiation. The system consistent of a BTS2048-UV-S-WP (Spectroradiometer with tube), SUT-1711 (Suntracker), SUT-Z01 (Sunfinder), SolarRunner (Software) and connection cables. Evaluations like TOC (Total Ozone Column) are supported by the measurement system.

BTS-Solar Versions before VIS and NIR

Versions with BTS2048-VL-TEC-WP (UVvisNIR) as well as BTS2048-IR-WP (IR) are also available. This is of particular interest for spectral AOD (Aerosol Optical Depth). See for example this publication: AOD with BTS

Compact sun tracker design

The SUT-1711 is a compact sun tracker for worldwide use under all weather conditions. It is equipped with a tripod stand and a spirit level for adjustment. Two variants with low (BTS-Solar-1901) and increased (BTS-Solar-1902) mounting heights of the sun tracker are available.

Payload designed for single devices

The accurate motion system does not require maintenance. The maximum payload depends on the resulting leverage and is typically limited to 5.5 kg. The unit is perfectly suited for the BTS2048-xx-WP series.

Fine sun tracking accessory

For extended accuracy sun tracking a direct sun sensor with integrated GPS receiver and four quadrant diode can be used as an accessory (SUT-Z01). This system automatically configures location and provides precise time information. This sensor is usually connected with the measurement device and communicates via the application software with the sun tracker.

Software controlled 

The SolarRunner software is the application software for the full measurement system.

In addition the SUT-1711 can be controlled by a software development kit (SDK) or by the application software of the used Gigahertz-Optik GmbH measurement device (e.g. BTS2048-xx-WP series). The software automatically controls the SUT-1711 in order to track the sun position depending on the GPS position and time. For even more precise control and automatic setup the fine sun tracking accessory SUT-Z01 is recommended.

Global spectral irradiance

In addition we have achieved very good results for the BTS2048-UV-S-WP in a scientific intercomparison with double monochromator. A scientific publication by INTA showed a very good agreement in a three comparison campaigns of global UV spectral irradiance measurements: Comparison of global UV spectral irradiance measurements between a BTS CCD-array and a Brewer spectroradiometer.

BTS-Solar at Brewer intercomparision in Mazagon/Huelva

BTS-Solar at Brewer intercomparision in Mazagon/Huelva

SUT-1711 equipped with BTS2048-UV-S-WP and tube for direct sun measurement

SUT-1711 equipped with BTS2048-UV-S-WP and tube for direct sun measurement

Similar Products

Spectroradiometer ideal for high precision outdoor UV measurements
Outdoor Spectroradiometer for Solar VIS measurements
Spectroradiometer ideal for high precision outdoor IR measurements

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