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CWS220E 868-MHz Kabelloser Infrarot-Temperatursensor
Kabelloser Sensor
für Funknetzwerke
wetter wasser energie gas flux and turbulence bauwerke boden

Überblick

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. 

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Funktionen und Vorteile

  • Ermöglicht Temperaturmessungen von Strassenoberflächen, Pflanzendach, Bodenoberfläche, Schnee- und Wasseroberflächen
  • Breitbandfunkmodem mit internen Frequenzsprüngen ermöglicht Übertragung über größere Strecken und mit weniger Inteferenzen
  • Battery powered
  • Eine zuverlässige, wartungsarme und stromsparende Methode zum Messen wo Sensorkabel unpraktisch sind oder aus anderem Grund unerwünscht
  • Übertagungen können von bis zu 3 anderen kabellosen Sensoren weitergegeben werden
  • Misst kontinuierlich Oberflächentemperaturen im Feld
  • Ideal for providing spatial averages
  • Kompatibel mit CR300, CR800, CR850, CR1000, CR6 und CR3000 Datenlogger

Bilder

Technische Beschreibung

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.

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.

Spezifikationen

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
Optics Germanium lens
Wavelength Range 8 to 14 μm (Corresponds to atmospheric window.)
Field of View (FOV) 22° half angle
Absolute Accuracy
  • ±0.2°C (-10° to +65°C)
  • ±0.5°C (-40° to +70°C)
Uniformity
  • ±0.1°C (-10° to +65°C)
  • ±0.3°C (-40° to +70°C)
Repeatability
  • ±0.05°C (-10° to +65°C)
  • ±0.1°C (-40° to +70°C)
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

Frequency 868 MHz
Where Used Europe
FHSS Channel 16
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

Kompatibel mit

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Datenlogger

Product Compatible Note
CR1000
CR200X (retired)
CR216X (retired)
CR5000 (retired)
CR6 The CR6 datalogger must have data logger OS version 4.0 or higher.
CR800
CR850
CR9000X

Additional Compatibility Information

Mounting

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.

Downloads

Wireless Sensor Planner v.1.7 (30.5 MB) 08-08-2013

The Wireless Sensor Planner is a tool for use with Campbell Scientific wireless sensors.  It assists in designing and configuring wireless sensor networks.