Applications :
For water activity measurements in bulk materials such as flour, grain, spices, etc. For solid and pasty products such as meat, sausage as well as oils, fats, etc.
Features :
- 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
- For use with HygroLab C1, HP23-AW-A
Source : http://www.rotronic.sg/humidity-measurement-feuchtemessung-temperaturmessung/water-activity-wasseraktivitaet/hc2-aw.html