The Marine Guardian Photoelectric Infrared Sensor Kit [TMG-SBI]Photoelectric Infrared Sensor Kit Protect electronics and gear with this infrared sensor for The Marine Guardian. The infrared sensor is a boater's first line of defense that can be mounted outside the cabin at entry points or at the helm. Also, this sensor uses a true photoelectric beam, which ensures protection against false alarms due to shadows, sunlight, etc. This product may not be returned to the original point of purchase. Please contact the