HC2-AW USB probe

For measurements in bulk materials

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For water activity measurements in bulk materials such as flour, grain, spices, etc. and for solid and pasty products such as meat, sausage as well as oils, fats, etc.


  • Measurement range: 0 to 1 aw (0 to 100 %rh), -40 to 85°C
  • On/Off switch
  • UART interface for direct connection to a PC
  • Power supply via UART interface
  • Adjusted at 23°C and 10, 35, 80 %rh
Probe type Aw Measurement probe with USB interface
Dimensions Ø 68 x 60 mm
Weight 600 g
For use with HW4 Software
Range of application -40…85 °C (-40…185 °F) / 0…100 %RH
Accuracy at 23 ±5 °C ± 0.008 aw / 0.8 %RH / ±0.1 K
Power supply USB Powered
Long-term sensor stability <1 %RH / year
Humidity sensor HYGROMER® WA-1 / Pt-100, 1/3 DIN Class B
Temperature dependence 0.001 K/K, 0.0002 aw/K
Filter type Wire mesh filter with 20…25 μm pore size
Response time t 63 <20 sec.
Psychrometric calculations Dew or frost point
Connection Via USB2 to PC, 3 m cable
Start-up time 1.5s
Measurement interval 1s
Communication interface USB
Material Stainless steel / aluminum
IP protection rating IP20
FDA / GAMP FDA 21 CFR part 11 / GAMP5
CE / EMC conform EMC 2008/108/EG

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