Get exclusive volume discounts, bulk pricing updates, and new product alerts delivered directly to your inbox.
By subscribing, you agree to our Terms of Service and Privacy Policy.
Direct access to our certified experts
Get exclusive volume discounts, bulk pricing updates, and new product alerts delivered directly to your inbox.
By subscribing, you agree to our Terms of Service and Privacy Policy.
Direct access to our certified experts

The HC2A-S / HC2A-S3 is the most versatile probe from ROTRONIC and forms the basis of the product portfolio. It measures humidity and temperature and calculates the dew/frost point.
Applications: HVAC, food industry, building services equipment, paper, textile and pharmaceutical industries
Features
• Relative humidity, temperature measurement and dew point calculation
• Outstanding accuracy and repeatability
• Excellent long-term stability <1 %RH / year
• Integrated data acquisition and calibration history
• Auto-diagnostics with error compensation
• Programmable alarm functions
• Advanced easy-to-use calibration features
• 100% field interchangeable
PROBE TYPE: Standard probe
OPERATING RANGE: -50…100 °C / 0…100 %rh
ACCURACY W. ADJUSTMENT PROFILE "STANDARD": ±0.8 %RH / ±0.1 K, at 10...30 °C; Adjustment at 23 °C and 10, 35, 80 %RH
ACCURACY W. ADJUSTMENT PROFILE "HIGH PRECISION": ±0.5 %RH / ±0.1 K, at 10...30 °C ; at 23 °C and 10, 20, 30, 40, 50, 60, 70,
80, 90 %RH
POWER CONSUMPTION: 3.3…5 VDC
CURRENT CONSUMPTION: 4.5 mA at 3.3 VDC
LONG-TERM STABILITY: <1 %rh / year
HUMIDITY SENSOR: Hygromer HT-1
TEMPERATURE SENSOR: PT100 1/3 DIN Class B
PROBE PROTECTION: Polycarbonate plastic cage, black
FILTER CARTRIDGE: Polyethylene
FILTER TYPE: Polyethylene, 40 μm
RESPONSE TIME T 63: <15 sec.
ALLOWED WIND SPEED: 20 m/s, with filter
PSYCHROMETRIC CALCULATIONS: Dew or frost point
REPRODUCIBILITY AIRCHIP: <0.02 %rh / 0.01 K
EXPLOITATION SOFTWARE: ROTRONIC HW4
PROBE ADJUSTMENT BY SOFTWARE: 1 Point & multipoint %rh & °C
FIRMWARE UPDATE: With internet and HW4 software
USER INFORMATION: from Software HW4 (devicemanager)
DATA PROCESSING VIA HW4: with interface cables
DEVICE PROTECTION BY PASSWORD: Yes
TYPE OF OUTPUT SIGNALS: 2 x 0…1 VDC
ANALOGUE OUTPUTS SCALEABLE BY THE USER: Yes
ANALOG OUTPUT SIGNAL (STANDARD): 0…1 V = 0…100 %rh; 0…1 V = -40…60 °C
DIGITAL OUTPUT SIGNAL (STANDARD): UART
SERVICE INTERFACE: 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 MATERIAL: PEEK
ENCLOSURE MATERIAL: Polycarbonate
HOUSING : Polycarbonate
FDA/GAMP COMPATIBILITY: FDA 21 CFR Part 11 and GAMP compatible
DIMENSIONS: Ø15 x 108 mm