Campbell Scientific Wireless Sensor Network (CWB100, CWS220, and CWS900) - Manual (Page 13)

Wireless Sensor Network
The CWS655 outputs 8 values: Volumetric water content, Bulk electrical
conductivity, Dielectric permittivity, Soil temperature, Period Average,
Voltage ratio, Internal temperature, Battery voltage, and Signal strength.
Additional detail regarding CWS655 output is available in Appendix B.
For specifications of the CWS655, see Section 2.4.
1.5 CWS900 Wireless Sensor Interface
The CWS900 is a Wireless Sensor Interface. The CWS900 measures analog
voltages, low level AC, pulse counts, and can supply an excitation voltage for
powering some sensors or making bridge measurements. It has a sealed
connector for use with a variety of sensors, such as temperature/humidity
probes, rain gages, wind monitors, or other low power sensors. The type of
measurement that the sensor performs is configured using Wireless Sensor
Planner, Network Planner, or DevConfig software.
FIGURE 1.5-1. CWS900 Wireless Sensor Interface
The CWS900 outputs 4 - 12 values, depending on configuration. Tables 1.5-1
and 1.5-2 show available configurations and outputs.
It is important to note the units of the measurement being made by the
CWS900. In some cases additional processing of the measurement by the
datalogger program or post processing in a spreadsheet or database will be
necessary to convert the measurement to engineering units.
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