Water activity measurement stations measure in the range of 0…1 aw which equates to 0…100 %ERH and supply a digital output signal to interface with HygroLab and HygroPalm water activity indicators. Digital calibration can be performed with the help of these instruments, or with PC software. The HC2-AW and AW-DIO measurement stations have a large thermal mass. This means the probes react very slowly to temperature changes so that virtually no variations arise during measurement – especially when using the AW Quick function. The extremely small internal volume of the sensor chamber ensures humidity equilibrium is reached very quickly in the case of all products.