AIRMAR Smart ST850 9 to 16 VDC Plastic Low-Profile Through-Hull Speed and Temperature Sensor|ST850PV-N2

AIRMAR ST850PV-N2, Plastic housing, Speed and temp sensor for NMEA2000 Network

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The ST850 is a low profile, retractable, thru-hull sensor that computes accurate speed and temperature data and sends it to any NMEA 0183 or NMEA 2000® display or network. These low profile units are nearly flush and minimize drag with only 5 mm (3/16 in) extending outside of the hull. The housing features a water valve which minimizes water ingress into the boat when the retractable insert is temporarily out for cleaning. Airmar’s Smart™ Sensors have embedded microelectronics – the transducer element and signal processor are only millimeters apart. The signal from the depth transducer is processed right inside the sensor itself. All that is needed to receive depth and temperature data is a single cable into a compatible network or display. Available as an analog sensor or a digital Smart™ Sensor that can output in NMEA 0183 or NMEA 2000® format.

Additional information

Weight 5 lbs
Item Name






Low Profile



Cable Length

20 ft NMEA 2000 Cable, 30 ft Analog Cable

Voltage Rating

9 to 16 VDC


Speed and Temperature

Acoustic Window


Mounting Type



2.94 in Dia x 4.88 in L

Amperage Rating

<200 mA Supply

Data Update Rate

1 per Second

Pressure Rating

3 m

Pulse Rate

17000 p/nm (4.8 Hz per knots)

Speed Rating

2 to 45 knots (2 to 52 MPH)

Temperature Sensor Accuracy

+/-0.5 deg C