Rotronic HC-HP28

Handheld Probe for Measuring Bulk Packaged Materials



Handheld Probe for Measuring Bulk Packaged Materials

The insertion probe is suitable for measurement in bulk materials, bricks, concrete, etc. It measures humidity and temperature and calculates the dew/frost point.

10 mm insertion probe: measurements in dusty bulk materials such as flour, sugar, etc.

• Range of application: -40…85 °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
• Adjusted at 23 °C and 10, 35, 80 %rh


Brochure Water activity (PDF)


Accuracy at 23 ±5 °C± 0.008 aw / 0.8 %rh / ±0.1 K
Accuracy w. adjustment profile “standard”at 23 °C / 10, 35, 80 %rh ± 0.8 %rh / ± 0.1 K
Probe typeInsertion probe
Operating range-40…85 °C / 0…100 %rh
For use withHygroLab C1, HP23-AW-A
Range of application-40…85 °C (-40…185 °F) / 0…100 %RH
Power supply3.2…5 VDC, calibrated at 3.3 VDC, current: ~4.5 mA
Long-term stability<1 %rh / year
Humidity sensorHygromer IN-1
Temperature dependence0.001 K/K, 0.0002 aw/K
Temperature sensorPT100 1/3 DIN Class B
Filter typeSintered steel with 5 μm pore size
Response time t 63<20 s, with filter
Allowed wind speed40 m/s, with filter
Psychrometric calculationsDew or frost point
Measurement interval1 s
Reproducibility Airchip<0.02 %rh / 0.01 K
Start-up time1,5 s
Exploitation softwareROTRONIC HW4
Probe adjustment by software1 Point & multipoint %rh & °C
Software UpdateWith internet and HW4 software
User informationfrom Software HW4 (devicemanager)
Data processing via HW4with interface cables
Device Protection by passwordYes
Analogue outputs scaleable by the userYes
Analog output signal (standard)0…1 V = 0…100 %rh; 0…1 V = -40…60 °C
Digital output signal (standard)UART
Type of output signals2 x 0…1 VDC
Enclosure materialPOM
IP protection ratingIP50
MaterialStainless steel DIN 1.4305 (probe), POM (handle)
Max. cable lengthUp to 5 m with passive cable. Up to 100 m with active cable.
Probe materialStainless steel 1.4305 (V2A)
Reverse voltage protectionMechanically in the connector
Service InterfaceUART
FDA / GAMPFDA 21 CFR part 11 / GAMP5
FDA/GAMP compatibilityFDA 21 CFR Part 11 and GAMP compatible
CE / EMC conform2007 / 108 / EG
DimensionsHC2-HP28: Ø10 x 280 mm
Weight200 g
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