This product is no longer available. Some accessories, replacement parts, or services may still be available.
CWB100A 922 MHz Wireless Sensor Base for Australia
Hub of Wireless Sensor Network
Polls and stores data from up to 50 wireless sensors
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications


The CWB100A is the master radio in a Campbell Scientific wireless-sensor network. It polls and stores data from up to 50 wireless sensors, and then passes that data to a datalogger. Its internal radio has a 920 to 928 MHz frequency range, which is used in Australia, Israel, and other countries worldwide.

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Benefits and Features

  • Internal frequency-hopping, spread-spectrum radio provides longer range and less interference
  • Polls and stores data from up to 50 wireless sensors
  • Configurable to fit your application

This product will be discontinued as of 10 April 2017. Please review the CWS-Series and CWB-Series Discontinuation Notice for further details. 


Detailed Description

The CWB100A is the base station used in a Campbell Scientific wireless sensor network. It contains an internal 922-MHz spread spectrum radio that receives data from the wireless sensors in the network. The frequency of the CWB100A's internal radio is commonly used in Australia and New Zealand. The datalogger is connected to the CWB100A for processing and storing the wireless sensor's data.

Why Wireless?

There are situations when it is desirable to make measurements in locations where the use of cabled sensors is problematic. Protecting cables by running them through conduit or burying them in trenches is time consuming, labor intensive, and sometimes not possible. Local fire codes may preclude the use of certain types of sensor cabling inside of buildings. In some applications measurements need to be made at distances where long cables decrease the quality of the measurement or are too expensive. There are also times when it is important to increase the number of measurements being made but the datalogger does not have enough available channels left for attaching additional sensor cables.


Operating Temperature Range -25° to +50°C
Operating Relative Humidity 0 to 100%
Power Source Datalogger
Voltage 4.5 to 22 Vdc
Standby Typical Current Drain < 1 mA (@ 12 Vdc)
Receive Typical Current Drain 10 mA (@ 12 Vdc)
Transmit Typical Current Drain 20 mA (@ 12 Vdc)
Communication Serial protocol or USB
Terminal Block Connector Bi-directional serial datalogger connection
USB Port Computer connection for configuration
Antenna Connector RPSMA antenna connection
Memory Capacity Can store data table for up to 50 wireless sensors.
Dimensions 10.8 x 4.4 x 4.4 cm (4.25 x 1.75 x 1.75 in.) including mounting bracket
Weight 140 g (5 oz)

Internal 25 mW FHSS Radio

Frequency 920 to 928 MHz
Where Used Australia and New Zealand
FHSS Channel 50
Transmitter Power Output 25 mW (+14 dBm)
Receiver Sensitivity -110 dBm (0.1% frame error rate)
Standby Typical Current Drain 3 μA
Receive Typical Current Drain 18 mA (full run)
Transmit Typical Current Drain 45 mA
Average Operating Current 15 μA (with 1-second access time)
Quality of Service Management RSSI
Additional Features GFSK modulation, data interleaving, forward error correction, data scrambling, RSSI reporting


The datalogger is programmed to interface with the CWB100A and determine a polling interval. The sensors make their measurements as they are polled. The base station polls all sensors and stores the collected data early enough that it can transfer the data as soon as the datalogger requests it. This minimizes the amount of time the datalogger needs to wait for a response from the network through the CWB100A base station.

At the start of each polling interval, the datalogger polls the base station, and sensor values are transferred to the datalogger for storage. This method of data transfer from the sensors to the datalogger provides the fastest and lowest power method available.

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR6 Series

Compatible Retired Dataloggers

None of our retired dataloggers are compatible.

Compatible Datalogger Operating Systems (OS)

The CR1000, CR3000, CR800, and CR850 datalogger must have datalogger OS version 21 or higher.

The CR6 datalogger must have datalogger OS version 4.0 or higher.


CWB100 Firmware v.1.04 (711 KB) 06-10-2013

Latest firmware for the CWB100.  

View Update History

CWB100 USB Driver () 01-01-2014

Windows USB drivers for the CWB100 are installed via the Device Configuration Utililty. In the Device Configuration Utility, click on the link "install the device driver for the CWB100" in the main body of text for the CWB100.

Note: Driver must be installed before connecting the CWB100 to your computer.