The HCD-S digital probe is characterized by its high performance. Very low current consumption, the highest accuracy, and measurement results within 50 ms (electronics) are its outstanding features. This is due to the new AirChip4000, which together with the new HYGROMER® HT-1 sensor forms a powerful combination.

• Measures relative humidity and temperature, calculates the dew point 
• With new HYGROMER® HT-1 sensor
• Outstanding accuracy and repeatability 
• Accuracy ±0.8 %RH
• Excellent long-term stability <1 %RH / year
• Developed for very low power applications 
• Digital calibration and adjustment
• Compatible with RMS data loggers and RMS software
• Conforms to FDA 21 CFR Part 11 / GAMP 5


Probe type Digital standard probe
Dimensions Ø15 x 108 mm
Weight 10 g
Operating range -40..85 °C / 0…100 %rF
Accuracy w. adjustment profile "standard" ±0.8 %RH / ±0.1 K, at 10...30 °C
Adjustment at 23 °C and 10, 35, 80 %RH
Power supply / Power consumption 2.5…5.5 VDC
Current consumption <0.5 mA @ 2.5…5.5 VDC
Long-term stability <1 %rh / year
Humidity sensor Hygromer HT-1
Temperature sensor Pt1000, Class B 1/3
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 Via RMS-Config / RMS Server Software / RMS Cloud
Digital output signal (standard) 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.
Housing Polycarbonate
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible