The HC2S3, manufactured by Rotronic, is a rugged, accurate temperature and humidity probe that is ideal for long-term, unattended applications. The probe uses an advanced capacitive sensor to measure relative humidity. The probe includes a filter to protect the sensor from dust and particles, for superior performance and reliability.Read More
The HC2S3 comes with a polyethylene filter that protects its sensor from fine dust and particles and minimizes water absorption and retention. Alternatively, a Teflon filter is available for marine environments. The response time is slower when using the Teflon filter.
|Electronics Operating Limits||-40° to +100°C|
|Storage Temperature Range||-50° to +100°C|
|Filter Description||Polyethylene (standard) or Teflon (optional, ordered separately)|
|Supply Voltage||5 to 24 Vdc|
1.5 s (typical)
The startup time is a Rotronics specification. For programming, Campbell Scientific recommends a 2 s delay at 60°C, a 3 s delay at 0°C, and a 4 s delay at -40°C.
|Maximum Startup Current||< 50 mA (for 2 μs)|
|Diameter||15 mm (0.6 in.)|
|Weight||10 g (0.35 oz)|
|Sensor||PT100 RTD, IEC 751 1/3 Class B|
-40° to +60°C (default)
Air temperature measurement ranges from -50° to +100°C are possible; contact Campbell Scientific for more information.
|Output Signal Range||0 to 1 V|
|Accuracy||±0.1°C with standard configuration settings (at 23°C)|
|Long-Term Stability||< 0.1°C/year|
|Sensor Time Constant - Standard PE Filter||≤ 22 s (63% step change [1 m/s air flow at sensor])|
|Sensor Time Constant - Optional Teflon Filter||≤ 30 s (Typical 4 s, 63% of a step change [1 m/s air flow at sensor])|
|Temperature Accuracy||Refer to graph in probe manual.|
|Sensor||ROTRONIC® Hygromer IN-1|
|Measurement Range||0 to 100% RH (non-condensing)|
|Output Signal Range||0 to 1 Vdc|
|Long-Term Stability||< 1% RH per year|
|Accuracy||±0.8% RH with standard configuration settings (at 23°C)|
|Sensor Time Constant - Standard PE Filter||≤ 22 s (63% of a 35 to 80% RH step change [1 m/s air flow at sensor])|
|Sensor Time Constant - Optional Teflon Filter||≤ 30 s (Typical 10 s, 63% of a 35 to 80% RH step change [1 m/s air flow at sensor])|
|RH Accuracy over Temperature||Refer to graph in probe manual.|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
The HC2S3 should be housed in a 41003-5 10-plate naturally-aspirated solar radiation shield. This radiation shield mounts to a tripod or tower mast, crossarm, or user-supplied pole.
Number of FAQs related to HC2S3-L: 6
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Campbell Scientific offers two filter tips:
Note the difference between calibration and a field check. Calibration cannot be done in the field, as it requires an experienced technician and specialized equipment.
Field checks of measurements can be done to determine if the data make sense with the real-world conditions. Follow these steps to field check a sensor:
Most Campbell Scientific sensors are available as an –L, which indicates a user-specified cable length. If a sensor is listed as an –LX model (where “X” is some other character), that sensor’s cable has a user-specified length, but it terminates with a specific connector for a unique system:
If a sensor does not have an –L or other –LX designation after the main model number, the sensor has a set cable length. The cable length is listed at the end of the Description field on the product’s Ordering tab. For example, the 034B-ET model has a description of “Met One Wind Set for ET Station, 67 inch Cable.” Products with a set cable length terminate, as a default, with pigtails.
If a cable terminates with a special connector for a unique system, the end of the model number designates which system. For example, the 034B-ET model designates the sensor as a 034B for an ET107 system.
To measure ambient temperature and relative humidity (RH), mount the HC2S3-L probe inside a 41003-5 or 41003-5A 10-Plate Radiation Shield. The 27731 hex plug is shipped with the HC2S3-L so that it can be used with older 10-plate radiation shield models. The 6-plate radiation shield (pn 41303-5A) cannot be used with the HC2S3-L.
Many Campbell Scientific sensors are available with different cable termination options. These options include the following:
Note: The availability of cable termination options varies by sensor. For example, sensors may have none, two, or several options to choose from. If a desired option is not listed for a specific sensor, contact an application engineer at Campbell Scientific for assistance.