Passive Infrared

A passive infrared (PIR)sensor is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors.

To identify when a horse is approaching the post, we use passive infrared sensors mounted on the front of the post. As the horse walks up, the PIR sensors will detect it, opening the valve below the frost line, sending fresh water up into the basin for the horse to drink.