Patent ID: 7765713
Filing Date: 2010-08-03
Classification: F26B

Abstract:
1. An apparatus for the monitoring and the control of water vapor in a freeze-drying process comprising (a) a sterilizable freeze-drying device and (b) an optical spectrometer isolated from the internal volume of the sterilizable freeze-drying device by a window, wherein said optical spectrometer measures the water vapor present in the atmosphere of the freeze-drying device by emitting a light radiation in the atmosphere of the freeze-drying device through the window, said window being located in a wall of the volume defined by the freeze-drying device, wherein the optical spectrometer comprises an optical emitter and an optical detector located outside said freeze drying device, said optical emitter being separated from the internal volume of the freeze drying device by a first window located in a wall of said freeze drying device, and said optical detector being separated from the internal volume of the freeze drying device by a second window located in a wall of said freeze drying device.