1. The Saturator simulates the recording and playback on an analog tape mastering machine.

2. by including a pressure gauge between the saturator and traps (this because of increased dead space and adsorptive surface); or

3. An adiabatic saturator (28) receives a sample of exhaust air exiting a yankee dryer hood (16) to determine the humidity of the exhaust air.

4. This may be done either: (a) by including a pressure gauge between the saturator and traps (this because of increased dead space and adsorptive surface) ; or