120wx WeatherStation® Instrument

The 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 readings
• Apparent Wind speed & angle
• Barometric pressure
• Air temperature
• Wind chill
• Optional relative humidity module
• IPX4 with the RH Option
• IPX6 without the RH Option
• Output: Via a single cable (various lengths available)
  • NMEA 0183 protocol over RS422 interface and NMEA 2000 protocol over CAN BUS

Specifications

Wind Data

• Wind 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 @ 0°C to 55°C (32°F to 131°F), 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: 0° to 360°
• Wind Direction Resolution: 0.1°
• Wind Direction Accuracy @ 0°C to 55°C (32°F to 131°F), no precipitation*:

• Low Wind Speeds (5° RMS typical):

• 4 - 10 knots (4.6 MPH to 11.5 MPH, 2 m/s to 5 m/s)

• High Wind Speeds (2° RMS typical):

• >10 knots (>11.5 MPH, >5 m/s)

• Wind Direction Accuracy in wet conditions** (8° RMS Typical):

• 8 knots (>9.2 MPH, >4 m/s)

Compass Data

• Compass Accuracy:

• 1° static heading accuracy; 2° dynamic heading accuracy

Pitch and Roll Data

• Pitch and Roll Range / Accuracy: ±50° / <1°

Air Temperature Data

• Air Temperature Range***: -40°C to 55°C (-40°F to 131°F)
• Air Temperature Resolution: 0.1°C (0.1°F)
• Air Temperature Accuracy: ±1.1°C (±2°F)* @ >4 knots wind (>4.6 MPH wind) (>2 m/s wind)

Barometric Pressure Data

• Barometric 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: ±1 mbar (±0.029 inHg, ±1 hPa) when altitude correction is available

Relative Humidity Data

• Relative Humidity Range: 10% to 95% RH
• Relative Humidity Accuracy*: ±5% units RH

Operating Temperature

• Operating Temperature Range: -25°C to 55°C (-13°F to 131°F)

Supply Voltage

• Supply Voltage: 12 VDC
• Supply Current (@ 12 VDC):

• (<85 mA) <1.0W, LEN 2

Data Input/Output

• Output: Via a single cable (various lengths available)

• NMEA 0183 protocol over RS422 interface and NMEA 2000 protocol over CAN BUS

Other Specifications

• Weight: 300 grams (0.8 lb)
• Mounting Thread Size on Base: Standard 1”-14 UNS (3/4” NPT optional)
• Certifications and Standards:

• CE, IPX6 (Relative Humidity/IPX4), RoHS, IEC60945

RMS—Root Mean Square, LEN—Load Equivalency Number

*When the wind speed is less than 2 m/s (4.6 MPH) and/or air temperature is below 0°C (32°F),

wind, temperature, and relative humidity readings will be less accurate.

**Wet conditions include moisture, rain, frost, dew, snow, ice and/or sea spray in the wind channel.

***Temperature and relative humidity reports invalid during heater operation.

****Airmar has made the address claiming modifications to enable compatibility with the ISO 11783

communication protocol for the agriculture industry – that is based on the SAE J1939 protocol.