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Temperature and Relative Humidity Probe

Campbell Scientific

The CS215 is a temperature and relative humidity probe that uses a Swiss-made digital humidity and temperature element that makes accurate and stable measurements. The element is based on Sensirion's CMOSens technology, which has been tested for more than two years in alpine conditions. The CS215 outputs an SDI-12 signal that is measurable by most dataloggers.

To provide accurate and stable measurements the CS215 utilises a Sensirion SHT75 combined relative humidity and temperature element. Because this element can simply be replaced by the user in the field, which means there is no downtime for recalibration. 

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Specifications
  • Sensing Element: Sensirion SHT75

  • Communication Standard: SDI-12 V1.3 (responds to a subset of commands)

  • Housing Material: Anodized aluminum 

  • Housing Classification: IP65 (NEMA 4)

  • Sensor Protection: Outer glass-filled polypropylene cap. Inner expanded PTFE filter. Filter material has a porosity of 64% and a pore size of < 3μm.

  • Supply Voltage (typically powered by datalogger’s 12 V supply):Typical Current Drain: 120 μA (quiescent); 1.7 mA (measurement; takes 0.7 s)

    • 7 to 28 Vdc for serial numbers E13405 and newer
    • 6 to 18 Vdc for older models
  • EMC Compliance: Tested and conforms to IEC61326:2002

  • Operating Temperature: -40° to +70°C

  • Length including strain relief: 18.0 cm (7.1")

  • Diameter at sensor tip: 1.2 cm (0.5")

  • Diameter at cable end: 1.8 cm (0.7")

  • Weight w/10 ft cable 150 g (5.3 oz)