Contact Information:

Tel: (902) 469-1230

Fax: (902) 463-5603

email: sales@designeng.com

*Model S684-3 Three-Cell Automated Water Vapour Diffusion Apparatus - cont'd 2*
The system uses a unique combination cell design which may be used to do moisture diffusion tests to the Canadian Government Standards Board (CGSB) standard or to the Van Beest and Wittgen (VBW) method. This cell is similar to the combination cell used in the model 643 manual WVDA except that the dry air flow through the air-side half-cell is from side to side as opposed to radial.
	The cell creates a moisture gradient across the specimen by providing a means for mounting the specimen between a water source and a water sink. The source is water held behind a "wet" membrane and the sink is dry air flowing dehind a "dry" membrane. Moisture diffusion is measured by the computer as a mass loss from the water cavity behind the wet membrane. Moisture diffusion can also be measured manually as a volume loss.
*Cell Set Up Positions*
When set up in the CGSB mode,the wet membrane, typically made from teflon, is above the test specimen and the dry membrane, also made from teflon, is below the specimen. In VBW mode the dry membrane, typically made from teflon, is above the test specimen and the wet membrane, made from filter paper, is below the specimen.
<<Previous	Next >>

HOME |

PROJECTS |

PRODUCTS |

CONTACT |

LINKS