The ASL 405 Two Sensor Alert with One Tone is two 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. The sensors have a distinct tone so the client will know when there is an interruption.
Mounting Hardware Not Included. Requires 24 Volt Power Source. It Will Not Sense Drop Offs - Only Obstructions.