Airmar’s patented UST850 just turned your maintenance time into more cruising time—and made your boat smarter too. Get ultrasonic speed and temperature in a single thru-hull housing with no moving parts. This sensor is a high-precision, low-maintenance solution for use on power and sail boats of all types and sizes. Say goodbye to paddlewheel maintenance and hello to Smart^™ technology, from the company who invented the Smart^™ Sensor.