Air Quality
The CR800 series can monitor and control gas analyzers, particle
samplers, and visibility sensors. The datalogger can also automatical-
ly control calibration sequences and compute conditional averages
that exclude invalid data (e.g., data recorded during power failures or
calibration intervals).
Water Resources/Aquaculture
Our CR800 series is well-suited to remote, unattended monitoring
of hydrologic conditions. Most hydrologic sensors, including SDI-12
probes, interface directly to the datalogger.
Typical hydrologic measurements:
Water level is monitored with incremental shaft encoders, double
bubblers, ultrasonic ranging sensors, resistance tapes, strain gage
pressure transducers, or vibrating wire pressure transducers. Vi-
brating wire transducers require an CDM-VW300-series, AVW200-
series or another vibrating wire interface.
Well draw-down tests use a pressure transducer measured at
logarithmic intervals or at a rate based on incremental changes
in water level.
Ionic conductivity measurements use one of the switched
excitation ports from the datalogger.
Samplers are controlled by the CR800 or CR850 as a function of
time, water quality, or water level.
Alarm and pump actuation are controlled through digital I/O
ports that operate external relay drivers
Vehicle Testing
This versatile, rugged datalogger is ideally suited for testing cold and
hot temperature, high altitude, o-highway, and cross-country per-
formance. The CR800 and CR850 are compatible with our SDM-CAN
interface, GPS16X-HVS receiver.
Soil Moisture
The CR800 and CR850 are compatible with the following soil mois-
ture measurement technologies:
Soil moisture blocks are inexpensive sensors that estimate soil
water potential.
Matric water potential sensors also estimate soil water potential
but are more durable than soil moisture blocks.
Time-Domain Reectometry Systems (TDR) use a reectom-
eter controlled by the datalogger to accurately measure soil water
content. Multiplexers allow sequential measurement of a large
number of probes by one reectometer.
Self-contained water content reectometers are sensors that
emit and measure a TDR pulse.
Tensiometers measure the soil pore pressure of irrigated soils
and calculate soil moisture.
Other Applications
Wireless sensor/datalogger
networks
Avalanche forecasting,
snow science, polar, high
altitude.
Fire weather
Geotechnical
Historic preservation
The CR800-series dataloggers are ideal for monitoring water quality
and level at reservoirs, springs, canals, pipelines, and culinary sites.
Vehicle monitoring
includes not only
passenger cars, but
airplanes, locomo-
tives, helicopters,
tractors, buses,
heavy trucks, drilling
rigs, race cars, and
motorcycles.
Data measured by this
weather station near As-
pen, Colorado is used in
avalanche forecasting.
(8 strony)
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