| SOLAR-POWERING WATER RESOURCE AUTOMATION PROJECTS | ||
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While the example above uses a "do-it-yourself" type gate actuator, purchasing a 12- or 24-VDC commercial gate actuator is now possible. Today, AUMA and Rotork have DC models, as does Limitorque. Reclamation has installed several Limitorque 12-VDC actuators (Fig. 6). Most have been in operation for several years and have worked well. A typical commercial gate actuator costs between $3,500 and $6,000, excluding installation. The product comes with a manual control box, limit switches, a torque limit, and a gate position sensor.

Figure 6. This radial gate system on the Bear River Migratory Bird Refuge in northern Utah (USA) uses a solar-powered, commercially-available gate actuator.
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