 2030,
2031, 2032 Micro Response Anemometer
Description
This is a highly responsive and rugged 3-cup anemometer designed to measure
very low wind speeds (0.5 mph threshold). It is 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.
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.
Three Models
In addition to the Model 2030 two other types of micro response anemometers
are similar in construction but utilize different transducers. The Model 2031
utilizes 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.
The Model 2032 employs a normally open reed switch. A bar magnet attached
to the main shaft causes two closures of a reed switch per revolution. The
frequency of closures is thus proportional to wind speed.
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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