The compact single arm sun tracker is perfectly suited to support all kinds of Global, Diffuse and Direct Radiation measurement sensors. STR-21G is the base of the Solar Monitoring Systems (STR-21G-S), a turnkey measurement solution from EKO. The STR-21G provides a fully automated set up procedure through a GPS receiver providing increased reliability and enhanced functionality.

From sunrise to sunset 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 standard with a small table tripod (larger tripod available). The 24 VDC low power consumption tracker can be powered by a solar-powered battery system or DC power supply. A wide range AC power adapter can be supplied to connect to the grid.

For over 20 years our clients who have deployed the STR sun-tracker, experience ease of set-up, operating and reliable tracking.

Specifications – STR-21G
Arms – 1
Pointing accuracy Solar elevation: 0 to 87° – < 0.01 ° Angle resolution - 0.009 ° Rotation angle Zenith - -15 - 95 ° Rotation angle Azimuth - 0 - 360 ° Torque - 12 Nm Payload side arms - 7 kg Sun sensor FOV - 30 ° Ingress protection IP - 65 Operating temperature range - -40 - 50 °C Communication - RS-422 / 232C Power consumption - < 10 W Power supply - 21 to 32 VDC / 20W Power supply (Power Adapter) - 100 to 240 VAC / 20W Dimensions mm - 430 (W) x 380 (L) x 440 (H) Weight - 14.5 kg (With tripod) Motor - Stepper motor Number of axes : 2-axis Other characteristics : fixed