120wx WeatherStationA(R) InstrumentThe Model 120WX is Airmar's solution for recreational boating; feature rich, in a Durable, Rugged, Small footprint that is IPX4 or IPX6 rated for this environment.Reliability and performance, along with no moving parts, makes the 120WX an easy and affordable choice for your recreational boating needs.Ultrasonic wind readingsApparent Wind speed & angleBarometric pressureAir temperatureWind chillOptional relative humidity moduleIPX4 with the RH OptionIPX6 without the RH OptionOutput: Via a single cable (various lengths available)NMEA 0183 protocol over RS422 interface and NMEA 2000 protocol over CAN BUSSpecificationsWind DataWind Speed Range: 0 knots to 78 knots (0 MPH to 90 MPH, 0 m/s to 40 m/s)Wind Speed Resolution:0.1 knot (0.1 MPH, 0.1 m/s)Wind Speed Accuracy @ 0AdegC to 55AdegC (32AdegF to 131AdegF), no precipitation*:Low Wind Speeds:0 -10 knots; 1 knot RMS +10% of reading(0 MPH to 11.5 MPH; 1.1MPH + 10% of reading)(0 m/s to 5 m/s; 0.5 m/s + 10% of reading)High Wind Speeds:10-78 knots; 2 knots RMS or 5%, whichever is greater(11.5 MPH to 90 MPH; 2.3 MPH or 5%, whichever is greater)(5 m/s to 40 m/s; 1 m/s or 5%, whichever is greater)Wind Speed Accuracy in wet conditions**:5 knots RMS (5.7 MPH RMS, 2.5 m/s RMS)Wind Direction Range: 0Adeg to 360AdegWind Direction Resolution: 0.1AdegWind Direction Accuracy @ 0AdegC to 55AdegC (32AdegF to 131AdegF), no precipitation*:Low Wind Speeds (5Adeg RMS typical):4 - 10 knots (4.6 MPH to 11.5 MPH, 2 m/s to 5 m/s)High Wind Speeds (2Adeg RMS typical):>10 knots (>11.5 MPH, >5 m/s)Wind Direction Accuracy in wet conditions** (8Adeg RMS Typical):8 knots (>9.2 MPH, >4 m/s)Compass DataCompass Accuracy:1Adeg static heading accuracy; 2Adeg dynamic heading accuracyPitch and Roll DataPitch and Roll Range / Accuracy: A 50Adeg / 4 knots wind (>4.6 MPH wind) (>2 m/s wind)Barometric Pressure DataBarometric Pressure Range: 300 mbar to 1100 mbar (24 inHg to 33 inHg, 800 hPa to 1100 hPa)Barometric Pressure Resolution: 0.1 mbar (0.029 inHg, 0.1 hPa)Barometric Pressure Accuracy: A 1 mbar (A 0.029 inHg, A 1 hPa) when altitude correction is availableRelative Humidity DataRelative Humidity Range: 10% to 95% RHRelative Humidity Accuracy*: A 5% units RHOperating TemperatureOperating Temperature Range: -25AdegC to 55AdegC (-13AdegF to 131AdegF)Supply VoltageSupply Voltage: 12 VDCSupply Current (@ 12 VDC):(