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Overview

The HC2S3-QD 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.

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Detailed Description

The HC2S3-QD 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.

Compatibility

The military style connector attaches to the RAWS-F Fire Weather Quick Deployment Station, which has an on-board CR1000.

Mounting

The HC2S3-QD should be housed in a 41003-5 10-plate naturally-aspirated solar radiation shield.

Specifications

Electronics Operating Limits -40° to +100°C
Storage Temperature -50° to +100°C
Filter 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 Rotronics specification. For programming, Campbell Scientific recommends a 2 s delay at 60°C, 3 s delay at 0°C, and 4 s delay at -40°C.
Maximum Startup Current < 50 mA for 2 μs
Diameter 15 mm (0.6 in.)
Cable Length 165.1 cm (65 in.)
Length
  • 85 mm (3.3 in.) without connector
  • 121 mm (4.75 in.) with connector
Weight 10 g (0.35 oz)

Analog Outputs
Offset at 0 V ±3 mV (maximum)
Deviation for Digital Signal < ±1 mV (0.1°C, 0.1% R. H.)

Air Temperature
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 at +23°C ±0.1°C (with standard configuration settings)
Long-Term Stability < 0.1°C/year
Sensor Time Constant
  • 63% step change (1 m/s air flow at sensor)
  • ≤ 22 s (standard PE filter)
  • ≤ 30 s (optional Teflon filter)
Temperature Accuracy Refer to the graph in the 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
Response Time Typical 10 s, 63% of a 35% to 80% RH step change (1 m/s air flow at sensor)
Accuracy at +23°C ±0.8% RH (with standard configuration settings)
Sensor Time Constant
  • 63% of a 35 to 80% RH step change (1 m/s air flow at sensor)
  • ≤ 22 s (standard PE filter)
  • ≤ 30 s (optional Teflon filter)
RH Accuracy over Temperature Refer to the graph in the manual.