Photocell Eyes are the most common form of sensor we use and are useful for everyday applications as the eyes act as a presence sensor and are reliable and effective.
The Photocell Eyes send out a beam of invisible infrared light which is directed at a reflective strip opposite. Once the beam is broken the necessary action takes place (e.g. opening or closing of a gate).
Photocell Eyes can be ustilised in the following configurations:-
The first front eye is placed 100mm above the finished floor level in upright post supporting the lead-in rails. It is recommended that it be aminimum of 1.2m from the gate body. When a person or object breaks the beam of light the gate will open and close after a preset time delay. If the peson or object remains in the path of the light beam the gate will remain open.
The second front eye supplements and operates in the same way as the first front eye and is typically positioned on a cross rail close to the gate body. If the gate begins to close before the customer has passed it the activation of the second front eye will re-open it.
The six eye rear safety zone is highly recommended and offers incrased safety for pedestrians. If anyone of the sixeye beams is broken the gate arm stops moving. Detection of a presence in a rear safety zone overrides any other signal. The gate will not function until the safety zone is cleared of any presence and a preset time delay has elapsed.
The reverse action eye is exclusively for use with a reverse action gate and is incorporated into the leadout barrier rail. A reverse action gate allows uninhibited flow in one direction whilst inhibiting flow in the other direction. If movement is detected in the restricted direction the gate arm closes and remains closed until the reverse action eye detects return movement in the permitted direction or the preset time delay elapses. A minimum of 3 metres is required between the reverse action eye and the gate body to allow time to intercept the person attempting to exit in the wrong direction.
