Humidity of process air exiting from the hood

Vaisala products don't measure the humidity of the paper mass directly, but paper mills use the hood air measurement to monitor the drying process indirectly, and for avoiding excess humidity in the hood. This measurement is especially demanding if there is a risk of condensation. Vaisala provides fixed humidity transmitters for all different dryer types, and also hand-held meters for spot-checking and verifying the operation of the fixed instruments.