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Weather Stations



The NM150WX Ultrasonic Weather Station

By New Mountain Innovations


No mechanical parts! 


The New Mountain NM150WX weather station instrument is the only all-in-one weather sensor that calculates both true and apparent* wind speed and direction, barometric pressure, air temperature, relative humidity, dew point and wind chill temperature. The UV stabilized, ultra compact housing is fully waterproof and resistant to chemicals. 


Please note: 

  • This sensor requires a PC connection for displaying/storing data.
  • This unit doesn't measure rainfall, if you require rainfall data, our available options can be found here.


Sensors Provide:


Apparent Wind Speed & Direction Ultrasonic anemometer
Air Temperature Based on a negative temperature coefficient thermistor that measures the ambient air temperature
Relative Humidity Measured with a capacitive cell humidity sensor
Barometric Pressure Measured using a temperature-compensated silicon piezoresistive pressure sensor
Magnetic Compass Heading Two-axis magneto-inductive sensors
Pitch & Roll Angles Three-axis MEMS accelerometer
Position, Speed & Course Over Ground Global Positioning System (GPS) receiver




Wind Speed Range 0 m/s to 40 m/s (0 MPH to 92 MPH)
Wind Speed Resolution 0.1 m/s (0.1 MPH)
Wind Speed Accuracy 0C to 55C (32F to 131F), no precipitation*:
Low Wind Speeds: 0 m/s to 5 m/s (0 MPH to 11.5 MPH);
0.5 m/s (1.1 MPH) +10% of reading
High Wind Speeds: 5 m/s to 40 m/s (11.5 MPH to 92 MPH);
1 m/s (2.3 MPH) or 5% RMS, whichever is greater

In wet conditions**: 2.5 m/s (5.7 MPH) RMS

Wind Direction Azimuth 0 to 360
Wind Direction Resolution    0.1
Wind Direction Accuracy @ 0C to 55C (32F to 131F), no precipitation*:
-  Low Wind Speeds: 2 m/s to 5 m/s (4.6 MPH to 11.5 MPH) - 6 RMS typical
-  High Wind Speeds: >5 m/s (>11.5 MPH) - 3RMS typical

In wet conditions**: >4 m/s (9.2 MPH) - 8 RMS typical

Air Temperature Range -25C to 55C (-13F to 131F)
Air Temperature Resolution 0.1C (0.1F)
Air Temperature Accuracy 1C (1.8F)* @ >4 knots (>4.6 MPH) wind
Compass Accuracy 1 RMS when level
Barometric Pressure Range 850 mbar to 1150 mbar (25 inHg to 34 inHg, 850 hPa to 1150 hPa)
Barometric Pressure Resolution 1.1 mbar (0.032 inHg, 1.1 hPa)
Barometric Pressure Accuracy 20 mbar (0.59 inHg, 20 hPa) when altitude correction is available
Relative Humidity Range 10 to 95% RH
Relative Humidity Accuracy 4% units RH
GPS Position Accuracy 3 m (10) with WAAS/EGNOS (95% of the time, SA off)
Supply Voltage 9 VDC to 16 VDC
Supply Current <150 mA
Operating Temperature Range -25C to 55C (-13F to 131F)
Weight  285 grams (0.7 lb)
Power Consumption <100 mA in normal operation (up to 1 Amp with heater)
Sensor Baud Rate (RS422/NMEA 0183) 4800 bps (can be increased to 38,400 bps with a command)
Thread Size 1-14 UNS or 3/4 NPT


How It Works:


The ultrasonic wind sensor (an ultrasonic anemometer) measures apparent wind speed and direction*. The weather station Instrument contains four ultrasonic transducers, visible through the four holes in the top of the sensors wind channel (see figure 1). These transducers operate in pairsone transducer injects a pulse into the air, and the other (directly opposite to it) listens for the arrival of that pulse (see figure 2). Each pulse bounces off the anodized aluminum plate at the bottom of the wind channel and is carried by the wind to arrive at the opposing transducer a short time later. When there is no wind, the pulse travels at the speed of sound from the sender to the receiver. Whenever the wind is blowing in that direction, the pulse will arrive sooner than if the air is still. Similarly, whenever the wind is blowing in the opposite direction, the pulse will arrive later than if the air is still. The four transducers take turns in sending and receiving pulses to cover all eventualities of wind direction. A built-in microprocessor combines the measurements from all four transducers to calculate the resultant wind speed and direction. The sensor monitors the air temperature, to compensate for the fact that the speed of sound in air changes with temperature. (The aluminum plate heats up to prevent frost and moisture from altering the wind readings.) Flow disturbances caused by the five posts are compensated for in software. Each Weather Station Instrument is calibrated in a wind tunnel to provide compensation for variations in production as well as asymmetry in the airflow channel.

* The Weather Station Instrument has the unique ability to display both true and apparent wind. True wind is the actual motion of the air relative to the earth. Apparent wind is the wind which an observer experiences while moving or on a moving vehicle. It is the result of these two motionsthe actual motion of the air (the true wind) and the motion of the vehicle. If the vehicle is not moving, then the true and apparent wind will be the same.


Comes complete with:


  • Sensor
  • 100' RS 485 data cable
  • Data cable to DB9 (serial) interface
  • 12V power supply
  • Weather View 32 software
  • Weathercaster software


Includes 2 year warranty from manufacturer.




Optional Accessories:


Mounting Pole Kit for NM150WX Weather Station.


#NM150MPK  MOUNTING POLE KIT FOR NM150WX   $40.00   Qty:  


100ft. Waterproof Cable Extension for NM150WX Weather Station.


#NM150XC  100' EXTENSION CABLE FOR NM150   $175.00   Qty:  


The Mobility Package includes a USB 12volt interface, which interacts with weathercaster software and provides ability to change advanced settings. Calculates your speed via GPS to output a true with speed when driving.


#NM150MP  MOBILITY PACKAGE FOR NM150   $175.00   Qty:  





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