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STR-21G one arm Sun Tracker
STR-21G
New
- Easy and accurate set up by automatic retrieval of position and time (GPS)
- Standard Integrated Sun sensor for accurate tracking and easy alignment
- Power consumption less than 10W
- Easy installation and operating without need of a computer
- Continuous clock synchronization enabling permanent reliable and accurate positioning of the solar radiometers measuring direct, diffuse and global irradiance
- RS-232 serial interface for extended position control and status information
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The compact sun tracker are perfectly suited to support all kinds of Global, Diffuse and Direct Radiation measurement sensors. Besides the standard EKO sensor mounts various mountings are available. EKO Instruments improved STR-21G with fully automated set up procedure through a GPS receiver providing increased reliability and enhanced functionality.
From sun rise to sun set the compact Sun-Tracker guarantees accurate sun tracking and pointing of the attached solar sensors. The 2-axis tracker automatically adjusts to the sun’s position by the sun sensor closed-loop control system, even if the tracker is not oriented or leveled properly.
The Sun Tracker comes with a small tripot that offers a stable surface for the measurement equipment. When AC power is not available on site a 24 VDC low power version can be used to run the EKO Sun-Tracker from a solar powered battery system.
| Model | STR-21G Single Arm | |
| Motor | Stepping motor | |
| Driving technology | Harmonic Drive |
|
| Pointing accuracy | < 0.01° (Solar Elevation: 0 to 87°) | |
| Angle resolution | 0.009° | |
| Rotation angle | Elevation-angle(-15° to +95°) Azimuth-angle(0° to +/-180°) |
|
| Torque | 12 Nm | |
| Payload | 7kg balanced | |
| Tracking mode | Sun-sensor mode and Calculation mode are automatically switched. | |
| Tracking accuracy of Sun-sensor mode | 0.01° | |
| Sun-sensor field of view | +/- 15° | |
| GPS Sensor measurement accuracy | Horizontal Position: Below 15m (2drms). GPS Positioning | |
| GPS Sensor positioning start time | < 5min. (depends on the recieving condition.) | |
| LED Indicator | Power, GPS status | |
| Environmental Protection | IP65 | |
| Temperature range | -40~+50℃ (-30 ~ +50℃ at cold start) | |
| Altitude for solar position calculation | No Limitation | |
| Communication | RS-232C, 9600bps, 8N1 | |
| Power requirement | AC100 to 240V, 50/60Hz, 20W DC21 to 32V, 20W for DC optional Sun Tracker (*Power consumption <10W) |
|
| Dimension | 430(W) x 380(D) x 440(H) mm | |
| Weight | 14.5 kg | |
