Airmar UDST800P-N2 Ultrasonic Smart Sensor - N2K
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Airmar UDST800P-N2 Ultrasonic Smart Sensor - N2K

SKU CD-84041
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UDST800P-N2 Ultrasonic Smart Sensor - N2K

The UDST800 just turned your maintenance time into more cruising time…and made your boat smarter too. Ultrasonic speed, depth, and temperature in one single housing with no moving parts make this sensor high precision, low maintenance solution for use on power and sailboats of all types and sizes. Say goodbye to paddlewheel maintenance and hello to Smart technology, from the company that invented the Smart™ Sensor.


  • Ultrasonic Depth, Speed and Temperature in one housing
  • Precise readings at high speeds ideal for powerboats, cruising, and sailing
  • Data Update Rate: up to 10 x per second
  • Advanced filtering & sampling rates for increased accuracy at all speeds
  • Adapts automatically to boat speed, water depth, and water clarity keeping speed-accuracy consistent
  • No moving parts – no paddlewheel


  • Correlation Speed Sensor Transmitting Frequency: 4.5 MHz
  • Correlation Pulse Repetition Frequency: 0.5 kHz to 12 kHz (varies with speed)
  • Speed Range: 0.1 to 50 knots (.1 MPH to 57 MPH)
  • Available Outputs: NMEA2000®
  • Water Temperature Range: -4°C to 40°C (32°F to 104°F)
  • Depth: 235 kHz
  • Depth Range: Minimum 0.6 m ( 2'), Maximum 100 m (328')
  • Supply Voltage—NMEA2000®: 9 VDC to 16 VDC
  • Supply Current: 80 mA - 200 mA, Average 125 mA @12VDC
  • Thru-Hull Housing Material: Plastic (bronze or stainless steel optional)
  • Thru-Hull Housing Diameter: 51 mm (2")
  • CE Compliant: Yes
  • Retrofits into AIRMAR P617V housing

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