Der CWS220E ist eine kabellose Version des SI111 Infrarot-Temperatursensors. Er misst die Oberflächentemperatur eines Gegenstandes ohne physikalischen Kontakt. Dieser Sensor hat ein internes 868-MHz-Funkmodem das die Daten zu einer CWB100E Basisstation überträgt. Die 868-MHz-Frequenz wird üblicherweise in Europa benutzt.Lesen Sie mehr
The CWS220E includes a thermopile, which measures surface temperature, and a thermistor, which measures sensor body temperature. The two temperature sensors are housed in a rugged body that contains a germanium window. It is battery powered using either alkaline batteries or a rechargeable battery and a solar cell.
The CWS220E can route its transmissions through up to three other wireless sensors. A datalogger is connected to the CWB100E base station for processing and storing its data. The CWS220E interfaces with a PC for configuration via the A205 CWS Sensor to PC Interface.
The calibration coefficients used for determining the target temperature by means of the Stefan-Boltzman equation are stored in the CWS220E at the time of calibration.
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.
|Weather Resistance||IP67 rating for sensor and battery pack (Battery pack must be properly installed. Each sensor is leak tested.)|
|Operating Temperature Range||-25° to +50°C|
|Operating Relative Humidity||0 to 100%|
|Power Source||2 AA batteries with a battery life of 1 year assuming sensor samples taken every 10 minutes. (Optional solar charging available.)|
|Average Current Drain||300 μA (with 15-minute polling)|
|Response Time||< 1 s (to changes in target temperature)|
|Target Temperature Output Signal||60 μV per °C difference from sensor body|
|Body Temperature Output Signal||0 to 2500 mV|
|Wavelength Range||8 to 14 μm (Corresponds to atmospheric window.)|
|Field of View (FOV)||22° half angle|
|Dimensions||15 x 6 x 4.5 cm (5.9 x 2.4 x 1.77 in.)|
|Weight||270 g (9.6 oz)|
Internal 25 mW FHSS Radio
|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, BCH (31,21), data scrambling|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
|CR6||The CR6 datalogger must have data logger OS version 4.0 or higher.|
The CWS220E mounts to a mast or pole via the the 26054 bracket. It is mounted at an appropriate distance from the target where it can measure an individual leaf, a canopy, or any surface of interest. Because the CWS220E is wireless, it can be mounted in many locations that would be problematic for a cabled sensor.
The Wireless Sensor Planner is a tool for use with Campbell Scientific wireless sensors. It assists in designing and configuring wireless sensor networks.