ST800PV-N2 NMEA 2000 Speed & Temp TransducerThe ST800 speed and temperature sensor process digital signals inside the thru-hull housing. Then this Smart(TM) Sensor sends data to a chart plotter, radar screen, or digital display in either analog or NMEA 2000A(R) format. These low-profile units are nearly flush, minimizing drag with only 5 mm (3/16) extending outside of the hull. Features:Speed and fast-response water-temperature sensingSpeed range from 2 to 45 knots (2 to 52 MPH)NMEA 2000 or NMEA 0183 analog outputRetractable insert in a low-profile housing with a water valveAvailable in a plastic (P120) or bronze (B120) housingAirmar's Smart(TM) Sensor technologySpecifications:Plastic: 0.7 kg (1.4 lb.)Bronze: 1.3 kg (2.8 lb.)Hull Material: Plastic: Fiberglass or metal/Bronze: Fiberglass or woodHole Diameter: 51 mm or 2Speed Range: 2 to 45 knots (2 to 52 MPH)Water Temperature: Range: -10 to 40AdegC (14 to 104AdegF)/ Accuracy: A 0.5AdegC (A 1.8AdegF)Pressure Rating: 3 m (10')Data: Output Protocol: NMEA 0183 or NMEA 2000/Update Rate: 1 time/sPower: Supply Voltage: 9 to 16 VDC/Supply Current: