New Mountain Ultrasonic Weather Station Instrument

The New Mountain weather station Instrument is the only all-in-one weather sensor that calculates apparent wind speed and direction, barometric pressure, air temperature, relative humidity, dew point and wind chill temperature.

With the optional internal compass and Global Positioning System, true wind speed and direction can also be calculated. The UV stabilized, compact housing is fully waterproof and resistant to chemicals.

The NM 100 Weather Station Instrument comes with our exclusive Weather View 32 Software. Data can be viewed in both digital and analog format and can be saved for a set period of time. Data can be accessed from other computers as well as uploaded to host sites such as weatherunderground.com Standard NMEA sentences and an RS485 interface allows for the flexibility of designing your own software program to fit your specific application. Our comprehensive technical manual makes the job easy!

The New Mountain NM100 weather station Instrument utilizes a standard 1-14” UNS thread connection to accommodate standard mounting hardware. The waterproof base connector assures trouble-free installation and servicing, while a quick disconnect feature allows for easy removal. Standard cable lengths of 25 m connects to our serial interface. An optional USB converter is available .

State-of-the-Art Wind Tunnel

 Every Weather Station Instrument is individually calibrated in a wind tunnel, whose wind .measurements are traceable to a National Institute of Standards and Technology (NIST) Standard Reference Material

How the New Mountain NM100 Weather Station Instrument 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 sensor’s wind channel (see figure 1). These transducers operate in pairs—one 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 a particular 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 motions—the 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.

NM-100 With Weather View 32 Standard Edition $1299

NM-100 With Weather View 32 Professional Edition $1399

Please call 877-864-3976 for information on additional options.