The CS215 is temperature and relative humidity sensor manufactured by Campbell Scientific Ltd. This probe uses a Swiss-made digital humidity and temperature element that provides good measurement accuracy and stability. The elements are based on CMOSens® technology, which have been tested for more than two years in Alpine conditions where they were shown to work to their specifications in extreme weather.

One major benefit of the CS215 is the ability to change the sensor element in the field. Each sensor element is individually calibrated so no further adjustment of the probe is required; simply changing the element returns the probe to factory calibration state for both temperature and humidity, allowing low-cost field recalibration without lengthy interruptions to data collection.

Features

Uses a combined digital humidity and temperature element
Field changeable element allows on-site recalibration
Digital SDI-12 output
Simple datalogger programming
Low power consumption

Specifications

Sensing Element: Sensirion SHT75
Communication Standard: SDI-12 V1.3 (responds to a subset of commands)
Supply Voltage: 6 to 16 Vdc (typically powered by datalogger’s 12 V supply)
Current Drain (typical): 120 μA (quiescent); 1.7 mA (measurement; takes 0.7 seconds)
EMC Compliance: Tested and conforms to IEC61326:2002

Relative Humidity

Measurement Range: 0 to 100% RH (-20° to +60°C)
Output Resolution: 0.03% RH
Accuracy (at 25°C): ±2% (10% to 90% range), ±4% (0% to 100% range)
Short Term Hysteresis: <1% RH
Temperature Dependence: better than ±2% over -20° to 60°C)
Stability (Typical): ±1.0% per year
Response Time w/Filter: <10 seconds (63% response time in air moving at 1 m s-1)
Calibration Traceability: NIST and NPL standards

Temperature

Measurement Range: -40° to +70°C
Output Resolution: 0.01°C
Accuracy: ±0.3°C at 25°C; ±0.4°C (+5° to +40°C); ±0.9°C (-40°C to +70°C)
Response Time w/Filter: <120 seconds (63% response time in air moving at 1 m s-1)

Producing Area:USA