The Airmar UST850 Smart Sensor combines ultrasonic speed and temperature measurement into a single plastic housing with zero moving parts. Designed to retrofit directly into existing ST650/ST850 series installations without a haul-out, it delivers high-accuracy speed data across a wide range — making it a practical upgrade for both power and sail vessels of any size.

Specifications:

• Ultrasonic speed and temperature in one housing
• No moving parts — eliminates paddlewheel maintenance
• Direct retrofit into Airmar ST650/ST850 Series without haul-out
• Speed range: 0.1 to 50 knots
• Data update rate: up to 10 times per second
• Precise readings at high speeds — suitable for powerboats and performance sailing
• NMEA 2000 output
• Plastic housing

Resources

• Owner's Manual (PDF)
• Installation Guide (PDF)

Note: This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.