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STR-21G Sun Trackers

Make:  Eko       Model:  STR-21G
✅ All-Weather Tracking with Integrated GPS Receiver & 4-Quadrant Sun Sensor
✅ Measurand: Global, Diffuse and Direct Radiation.
✅ Sensor Type: Harmonic Drive® mechanical gear system, for maximum positioning accuracy
✅ Signal Output: RS-232 serial Interface
✅ Supplied With: 10 m Power supply cable (AC or DC type), 3m Communication cable
                
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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.

Make

Eko

Model

STR-21G

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 Nm

Payload side arms

7 kg

Sun sensor FOV

30 °

Ingress protection IP

65

Operating temperature range

-40 to 50 °C

Communication

RS-422 / 232C

Power consumption

< 10 W

Power Supply

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

Driving Technology

Harmonic drive®

Tracking mode

Solar postion / Free positioning

Tripod

Table tripod

Pyrheliometer mount

Adjustable / One position

Cable length

10 m