1. Catalogs
  2. EKO Instruments
  3. STR-21G-S1 Technical Specifications
video corpo

STR-21G-S1 Technical Specifications

STR-21G-S1 Technical Specifications

STR-21G-S1 Technical Specifications

Product catalog summary
Overview: The STR-21G-S1 is a turnkey solar monitoring station designed for precise solar radiation measurements, including Direct Normal Irradiance (DNI), Global Horizontal Irradiance (GHI), and Diffuse Horizontal Irradiance (DHI). It features ISO 9060 secondary standard sensors and is compatible with various data acquisition systems.
Key Features:
  • Integration with DAQ systems via multiple analog or digital inputs.
  • Equipped with a sun-position sensor and GPS for easy setup.
  • Includes MS-80 pyranometer and MS-57 pyrheliometer for high-end solar energy research.
  • Configurable to measure solar radiation components accurately.
  • Optional MV-01 ventilator and heater for harsh climates.
  • Fast sampling rates for reduced measurement uncertainty.
Technical Specifications:
  • Sun Tracker (STR-21G): Features include a solar elevation pointing accuracy of < 0.01°, angle resolution of 0.009°, and a rotation angle range of Zenith -15 to 95° and Azimuth 0 to 360°. It has a torque of 12 Nm and can carry a payload of up to 15 kg.
  • Pyranometer (MS-80): Classified as a secondary standard with a response time of < 0.5 seconds and a temperature response of < 0.8% between -10°C to 40°C. It operates within a temperature range of -40 to 80°C and has an ingress protection rating of IP 67.
  • Pyrheliometer (MS-57): Classified as first class with a response time of < 0.2 seconds and a temperature response of < 0.5% between -20°C to 50°C. It also operates within a temperature range of -40 to 80°C and has an ingress protection rating of IP 67.
Power and Communication:
  • Power supply options include 21 to 31 VDC / 15W and 100 to 240 VAC / 20W.
  • Communication via RS-422 / 232C.
Options and Accessories:
  • Various cable lengths available for power and communication.
  • Ventilation unit MV-01 for enhanced performance in extreme conditions.
See more

Catalog excerpts

STR-21G-S1 Technical Specifications-1

STR-21G-S1 Solar Monitoring SystemsTechnical Specifications Turnkey Solar Monitoring Station DNI/GHI/DHI measurements ISO 9060 secondary standard sensors Low power consumption ISO17025 calibration EKO's new solar Monitoring System, called STR-21G-S1, is a dedicated sensor system to perform the most accurate solar radiation measurements of the three solar radiation components (Direct, Diffuse and Global). It can be easily integrated to any DAQ system, which has multiple analog or digital inputs. With the standard sun-position sensor and GPS receiver built inside the sun tracker the system set-up will be quick and easy. The system is based on the STR-21G Sun tracker with a new shading disk assembly which can be mounted on one arm of the tracker. In combination with the new generation MS-80 Secondary standard pyranometer and MS-57 First class pyrheliometer, the STR-21G-S1 is the most "high end" sensor system for solar energy research. The STR-21G-S1 system can be freely configured to measure the required Solar radiation components in the most accurate way. Hence a cost-effective solution can be created for every application. In harsh climate environments, the MV-01 ventilator & heater can be used . The MS-57 pyrheliometer has a heated front window to avoid condensation and ice which can affect the measurements. Global radiation can be composed by the sum of the cosine weighted direct and diffuse. This way the sun tracker with pyrheliometer and shaded pyranometer can provide all three Solar radiation components. Unique to the system, EKO's radiometers have the ability to sample much faster than traditional solar sensors. Faster sample rates allow the sensor to 'catch' more accurately the peak irradiance value under variable atmospheric conditions and lower the measurement uncertainty of one-minute average values.

 Open the catalog to page 1
STR-21G-S1 Technical Specifications-3

Bey°nd LrW Accuracy. Power supply

 Open the catalog to page 3
STR-21G-S1 Technical Specifications-4

Bey°nd LrW Accuracy. Non-stability change/1 year

 Open the catalog to page 4
STR-21G-S1 Technical Specifications-5

Bey°nd LrW Accuracy. Zero Offset A 200W/m2 Specifications are subject to change without further notice.

 Open the catalog to page 5
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.