Humminbird Speed & Temperature Sensor

Speed Sensor The transom speed sensor is compatible with many Humminbird fishfinders and provides a digital reading of boat speed through water. It also activates the trip log features in capable units. 20' cable and hardware included. Sensor monitors speed from 2 to 75 mph. Model number: SW. Speed and Temperature Sensor The transom speed and temperature sensor combines two of the most popular accessory inputs into one compact transom mount unit. Sensor monitors temperature from 25 F to 99 F and speed from 2 to 75 mph. 20' cable and hardware included. Model number: TS W.