Measuring instruments and accessories for meteorology


The HC2A-S3A probe is the meteorological probe with a white housing but with a different filter (Wire-mesh filter with 10 µm filter pore size suitable for meteorological applications). It measures relative humidity and temperature and calculates the dew/frost point and is designed for the use in Rotronic meteorological applications.

Features of the meteorological probe

  • Accuracy: ±0.8 %rh, ±0.1 K, at 23 °C (10...30 °C)
  • Range of application: -50…80 °C / 0…100 %rh
  • Digital interface (UART) and scalable analog outputs, 0…1 V
  • Standard output scaling: 0…1 V = -40…60 °C / 0…100 %rh


  • Especially designed for the use in meteorological applications
  • New humidity sensor HYGROMER HM1-SK
  • Outstanding accuracy, repeatability and long-term stability
  • Available with interchangeable sensor
  • Hot swappable, no calibration adjustment required due to the digital interface with Rotronic devices

Smart Electronic

  • Based on the Rotronic’s AirChip3000
  • Calculates the dew / frost point
  • Saves adjustment data so that probes can be interchanged without re-adjusting (Hot-swappable)

Flexibility and Compatibility

  • User scalable analog analog ouput signals (2x 0…1V)1
  • Digital interface via UART
  • Compatible with Rotronic devices HF5, HF8 and HP32
More Information
Probe type High-End Meteorological Probe
Humidity sensor Hygromer HM1-SK
Temperature sensor PT100 1/3 DIN Class B
Long-term stability <1 %rh / year with clean air or similar (See also pollutant table in the catalogue)
Accuracy w. adjustment profile "standard" ±0.8 %RH / ±0.1 K, at 10...30 °C
Adjustment at 23 °C and 10, 35, 80 and 90 %RH
Reproducibility Airchip <0.02 %rh / 0.01 K
Response time t 63 <15 sec.
Power consumption 3.3...5 VDC, Calibration @ 3.3 VDC / ~4.5 mA
Dimensions Ø15 x 108 mm
Operating range -50…80 °C / 0…100 %rh
Allowed wind speed Max. 50 m/s, with wire-mesh filter
Exploitation software ROTRONIC HW5
Psychrometric calculations Dew or frost point
Analogue outputs scaleable by the user Yes
Software Update With internet and HW5 software
User information from Software HW5 (devicemanager)
Type of output signals 2 x 0…1 VDC
Digital output signal (standard) UART
Service Interface UART
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Probe adjustment by software 1 Point & multipoint %rh & °C
Device Protection by password Yes
Analog output signal (standard) 0…1 V = 0…100 %rh; 0…1 V = -40…60 °C
Communication interfaces UART
Reverse voltage protection Mechanically in the connector
Max. cable length Up to 5 m with passive cable. Up to 100 m with active cable.
Probe protection Polycarbonate plastic cage, white
Enclosure material Polycarbonate
Weight 17 g
Data Processing via HW5 with interface cables
Filter type Wire mesh filter, 10 μm

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