The ASL 404 Four Sensor Alert with Two Tone is four long range photo electric sensors that will give an auditory cue when the photo electric beam is interrupted. They have an adjustable range of four to twenty one inches in length and can be mounted on the base of a chair facing outward and adjusted to the proper distance so that the client has time to stop before reaching an obstacle. There are two distinctive tones so the client will know which section is being obstructed. Mounting Hardware Not Included. Requires 24 Volt Power Source.
It Will Not Sense Drop Offs - Only Obstructions.