See The Top Five Reasons:
The NM150 Ultrasonic Weather Station
By New Mountain Innovations
No mechanical parts!
The New Mountain 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.
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 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 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.
Comes complete with:
Includes 2 year warranty from manufacturer.
100ft. Waterproof Cable Extension for NM150 Weather Station.
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.
Copyright © 2000-2015 Innovative Tech Works (IntelliWeather Inc.)