 2030 &
2031 Micro Response Anemometers
Description
These are highly responsive and rugged 3-cup anemometers designed to measure
very low wind speeds (0.5 mph threshold). They are constructed entirely of stainless
steel and anodized aluminum to resist corrosive environments. Like its wind
vane counterpart, the micro response anemometer has an aerodynamically shaped
body and utilizes a labyrinth to prevent dust and water from reaching the
bearings.
Two Models
The Model 2030 measures wind speed using a "photon chopper". Rotation of the main shaft by the cup assembly moves a slotted disc through
a photon beam, which is generated by a long-life infrared LED. The interruption
of the beam causes a pulse output with a frequency proportional to wind speed.
The photon-coupled chopper is mounted on the connector and can be removed
from the body simply by removing the connector.
The Model 2031 is similar in construction to the Model 2030, but uses
a DC generator to produce a DC voltage proportional to wind speed.
The main shaft couples the cup assembly directly to the generator. Output
is approximately 5.5 mV/mph.
Heaters
Optional heaters are available for use in cold climates to minimize freezing
of vane and anemometer shafts. The heater assembly, Model 20201, mounts between
the top and bottom sections of the sensor body. It consists of a solid block
of aluminum with a machined cavity containing a 20-watt heater. The block
acts as a heat sink, and the heater raises the block's temperature 20°C
above the ambient temperature. Environmental connectors are supplied with
the heater. An optional thermostat is available.
Mounting
The Model 2023 crossarm is recommended for mounting the micro response vane
in conjunction with the micro response anemometer. A mast adapter is available
for mounting either sensor alone on a l-inch 25mm O.D. mast. Fixed keying
of the sensor bodies makes orientation necessary one time only.
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