CS210 Enclosure Humidity Sensor
Remote Monitor
Ensure ideal conditions in enclosures
weather applications water applications energy applications gas flux & turbulence applications infrastructure applications soil applications


The CS210 enclosure humidity sensor measures relative humidity levels inside environmental enclosures. The sensor is housed inside the enclosure. A Campbell Scientific datalogger measures this sensor and stores its data.

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Benefits and Features

  • Allows enclosure RH to be monitored remotely
  • Used to schedule desiccant replacement


Detailed Description

When CS210's measurements indicates that the RH level inside the enclosure is 40% or more, the desiccant should be replaced with another packet. 

By having the datalogger measure the sensor, the measured values can be incorporated into the transmitted data stream of remotely located dataloggers. The probe has an 11-in. (28 cm) cable length, which should be adequate to place the probe near the enclosure conduits.


Sensor Elan HM2000 series precision bulk-polymer
Relative Humidity Measurement Range 0 to 100% (non-condensing)
RH Output Signal Range 0 to 1.0 Vdc
Accuracy ±3% RH (10 to 90% RH) (at 25°C)
Typical Long-Term Stability Better than 3% RH per year
Response Time 10 seconds for a 30% to 90% RH step change (at 25°C, 90% response)
Current Consumption < 0.5 mA
Supply Voltage 5 ± 0.25 Vdc
Settling Time 10 s
Operating Temperature Range 0° to 50°C
Cable Length 27.9 cm (11 in.)
Sensor Head Dimensions 2.5 x 1.3 x 0.8 cm (1.0 x 0.5 x 0.3 in.)
Weight 9 g (0.3 oz)


Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X CR6 Series CR300 Series

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

Frequently Asked Questions

Number of FAQs related to CS210: 6

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  1. Yes. The sensor can be used with a multiplexer that is capable of making a single-ended voltage measurement.

  2. Incorrect wiring, program errors, or a failed sensor might be the cause.

  3. The CS210 does not have any user-serviceable parts, and it does not require any routine maintenance.

  4. Campbell Scientific recommends replacing the CS210 after every three to five years of continuous use. Alternatively, if the CS210 probe fails, replace the sensor at that time.

  5. The desiccant should be replaced when the top colored dot on the humidity indicator card (pn 28878) turns pink; the humidity indicator card is included in the enclosure supply kit that is shipped with each enclosure. If the CS210, Enclosure Humidity Sensor, is used, replace the desiccant when the measured humidity exceeds 35%.