US Patent 9117361 Hand sanitizer monitor

A hand sanitizer unit for use with a pump bottle using a user activated dispensing pump with a main body housing an electronic circuit and defining a sensor aperture for use with two passive infrared sensors separated by a mechanical lens baffle to detect movement and direction of the movement. The unit also includes a pump sensor positioned to detect dispensing or lack thereof of a hand sanitizer to sound an alarm when motion is detected and the pump sensor does not detect activation of the user activated dispensing pump. Further items include a mute control switch, communication system, and a direction of motion switch connected to the microprocessor. The programming flow and method of operation of the unit are also disclosed.