STR-21G-S0
- With Harmonic Drive®
Features
- Integrated sun-position sensor and GPS for quick, easy and accurate setup
- Efficient, Cost-Saving, Low Power Consumption
- Easy Integration with any DAQ system
- Harmonic Drive® mechanical gear system, for maximum positioning accuracy
- Deployed in Antarctica, proven in extreme climates worldwide
STR-21G-S0
- With Harmonic Drive®
A turnkey solar monitoring station designed for high-precision solar radiation measurement, delivering industry-leading accuracy, reliability and value for solar energy research, monitoring, and meteorological applications.
Features
- Integrated sun-position sensor and GPS for quick, easy and accurate setup
- Efficient, Cost-Saving, Low Power Consumption
- Easy Integration with any DAQ system
- Harmonic Drive® mechanical gear system, for maximum positioning accuracy
- Deployed in Antarctica, proven in extreme climates worldwide
Overview
The STR-21G-S0 is a turnkey sensor system designed to perform the most accurate solar radiation measurements of direct solar radiation. Compatible with almost all DAQ systems, with multiple analog and digital inputs, the STR-21G-S0 is equipped with an internal sun-position sensor and GPS receiver for quick and easy set-up.
Based on the STR-21G Sun Tracker, in combination with the Class A MS-57 Pyrheliometer, the STR-21G-S0 system can be freely configured to measure the required solar radiation components in the most accurate way. The MS-57 has a heated front window to avoid condensation and ice, which can affect the measurements, ensuring uninterrupted accuracy, whatever the weather.
STR-21G Specifications
| Description | |||
|---|---|---|---|
STR-21G Sun TrackerWith integrated GPS, sun position sensor, and a Harmonic Geared type stepper motor, the STR-21G Sun Tracker is built to deliver unparalleled precision, optimal positioning, and reliability, whatever the weather. Easy to set up, the STR-21G automatically adjusts to the sun's position, even if the tracker is not oriented or levelled correctly, and can support a range of Global, Diffuse and Direct Radiation measurement sensors for custom configurations. The single configurable arm of the STR-21G can mount the MS-57 Class A Pyrheliometer for DNI readings and the optional MD-81-10 shading disk assembly, shielding any top-mounted pyranometer for diffuse solar radiation measurements. |
|||
| Attribute | View Product | ||
| Arms | 1 | ||
| Pointing accuracy Solar elevation: 0 to 87° | < 0.01° | ||
| Angle resolution | 0.009° | ||
| Rotation angle Zenith | -15 to 95° | ||
| Rotation angle Azimuth | 0 to 360° | ||
| Torque | 12 N⋅m | ||
| Payload side arms | 7kg | ||
| Sun sensor FOV | 30° | ||
| Ingress protection IP | 65 | ||
| Operating temperature range | -40 to 50°C | ||
| Communication | RS-422 / 232C | ||
| Power consumption | < 20W | ||
| Motor | Stepper motor | ||
| Driving technology | Harmonic Drive® | ||
| Tracking modes | Automatic & Manual | ||
| Tripod | Table tripod | ||
| Pyrheliometer mount | Adjustable / One sensor position | ||
| Cable length | 10m | ||
| Weight | 14.5 kg (with tripod) | ||
MS-57 Specifications
| Description | |||
|---|---|---|---|
MS-57 PyrheliometerThe MS-57 Class A Pyrheliometer is a fast, accurate, stable, and exceptionally reliable direct normal incidence (DNI) solar irradiance sensor. 'Fast-response' and 'spectrally flat' under ISO 9060:2018 specifications, each MS-57 is calibrated outdoors and tested against reference sensors fully traceable to the World Radiometric Reference. With an integrated low power window heater to prevent dew deposition or frost on the outside window, and competition-beating long-term stability, the MS-57 is truly 'all-weather' and perfectly suited to a range of applications. |
|||
| Attribute | |||
| ISO Specifications | |||
| ISO 9060:2018 | Class A | ||
| Response time 95% | < 0.2 Sec | ||
| Zero offset A - Thermal Radiation (200W/m²) | 0 W/m² | ||
| Zero offset B - Temperature change (5K/hr) | ± 1W/m² | ||
| Zero offset C - Total zero off-set | ± 1W/m² | ||
| Non-stability (change/year) | < 0.5% / 5 years | ||
| Non-linearity (100 to 1000W/m²) | ± 0.2% | ||
| Spectral Error | ± 0.2% | ||
| Temperature Response (-20°C to 50°C) | ± 0.5% | ||
| Tilt Response (0-90° | 1000W/m²) | ± 0.2% | ||
| Technical Features | |||
| Wavelength Range (nm) | 200 to 4000 (50% points) | ||
| Irradiance range (W/m²) | 0 to 4000 | ||
| Sensitivity (μV/W/m²) | Approx. 7 | ||
| Signal Output | Analog | ||
| Impedance (Ω) | < 15000 | ||
| Operating temperature | -40 to 80°C | ||
| Ingress Protection | IP 67 | ||
| Standard Cable Length | 10m (Optional lengths 20m, 30m, 50m) | ||
| Window Heater Power Requirement | DC 12V / 0.5W | ||
| Temperature Sensors | PT-100 Class A, Thermistor 44031 10kΩ | ||
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