Campbell Scientific CWS220A wireless radiometer

The CWS220A is a wireless version of the SI-111 infrared radiometer. It contains an internal 922 MHz spread spectrum radio that transmits data to a CWB100A wireless base station or to another wireless sensor.

The frequency of the CWS220A’s internal radio is commonly used in Australia and New Zealand.

A wireless sensor can route its transmissions through up to three other wireless sensors. A data logger is connected to the CWB100A base station for processing and storing the CWS220A’s data.

The device provides a non-contact means of measuring the surface temperature of an object or surface by sensing the infrared radiation given off by the subject. It comprises a thermopile that measures surface temperature and a thermistor that measures sensor body temperature. The two temperature probes are housed in a rugged aluminium body that contains a germanium window.