HC2S3-L
HC2S3-L
RetiredTemperature and Relative Humidity Probe
No longer available to order
This product is retained for service, documentation, and compatibility information.
Replaced by
- EE181
Air Temperature and Relative Humidity Sensor
- Model:
- HC2S3-L
- Item Number:
- 27725
- Warranty:
- 1 year
Overview
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.
Note: For customers with an HC2S3, the HC2A-S3 replacement sensor is available.
Key Advantages
Superior performance and reliability
Technical Description
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.
Product Notes
Benefits
- Well-suited for long-term, unattended applications
- Accurate and rugged
- Compatible with most Campbell Scientific dataloggers
Specifications
- Electronics Operating Limits
- -40° to +100°C
- Storage Temperature Range
- -50° to +100°C
- Filter Description
- Polyethylene (standard) or Teflon (optional, ordered separately)
- Current Consumption
- < 4.3 mA
(@ 5 Vdc)
< 2.0 mA(@ 12 Vdc)
- Supply Voltage
- 5 to 24 Vdc
- Startup Time
- 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)
- Analog Outputs
- ±3 mV
(maximum) offset at 0 V.
< ±1 mV(0.1°C, 0.1% R. H.) deviation for digital signal
- Diameter
- 15 mm
(0.6 in.)
- Length
- 85 mm
(3.3 in.) without connector
183 mm(7.25 in.) with connector
- Weight
- 10 g
(0.35 oz)
Air Temperature
- Sensor
- PT100 RTD, IEC 751 1/3 Class B
- Measurement Range
- -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.
Relative Humidity
- 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.
Common Accessories
(3)RAD10
10-Plate Solar Radiation Shield for Small Sensors
When exposed to sunlight, the HC2S3-L must be housed in a radiation shield. The RAD10 uses a double-louvered design that offers improved sensor protection from driving rain, snow, and insect intrusion. It also has lower self-heating in bright sunlight combined with higher temperatures (> 24°C (~75°F)) and low wind speeds (< 2m/s (~4.5 mph)), providing a better measurement.
Orderable41003-5
10-Plate Solar Radiation Shield
The 41003-5 provides a 10-plate naturally-aspirated radiation shield that houses one HC2S3 probe. Its louvered construction allows air to pass freely through the shield thereby keeping the probe at or near ambient temperature. The 41003-5 attaches to a crossarm, mast, or user-supplied pipe with a 1.0" to 2.1" OD.
Orderable27755
HC2S3 Replacement Teflon Filter
The 27755 Teflon Filter should be used instead of the polyethylene filter if the sensor will be in marine/salty or extremely humid environments. This Teflon filter has smaller pore size (10 micron) that provides good protection against fine dust particles and salt (marine environments), but with slightly slower response than for the polyethylene filter.
Orderable
Replacement Parts
(4)27730
HC2S3 Replacement Polyethylene Filter
The 27730 is a replacement polyethylene filter.
OrderableHC2S3CBL1
HC2S3 Replacement Analog Cable
The HC2S3CBL1 connects the HC2S3 sensor head with input and power terminals on the datalogger.
Orderable27731
Solar Radiation Shield Hex Plug for for Mounting the HC2S3 inside the 41003-5
The 27731 hex plug is required to mount the HC2S3 temperature and relative humidity sensor in the 41003-5 10-plate radiation shield.
OrderableHC2A-S3
Replacement Sensor for the HC2S3-L
The sensor is a drop-in replacement for existing installations, requiring no change in programming or wiring. This sensor does not ship with a cable. Please refer to the HC2S3CBL1-L if a cable is required.
Orderable
Compatibility
Mounting
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.
Related Resources
Services Available
- Calibration
- Yes