Where to buy/How to build a Devanathan-Stachurski cell? I'm preparing to do some hydrogen permeation tests to calculate the diffusivity of some iron samples. I would like to do this using the Devanathan-Stachurski cell, which consists of two cells, one where the hydrogen is charged and the other where it is oxidized (each containing an electrolyte solution), with the sample in the middle. The current produced by the diffusing hydrogen can be used to calculate diffusivity. 

Does anyone have experience using this cell and know where to purchase one? So far I've only been able to find one company that sells it, but I would like to know about more options. If anyone has built it from scratch, can you provide some specifications on dimensions and materials used and how it worked for you?
I would recommend you to do a research to find scientific articles on using DS cells. In this case if you have any specific questions you can try to contact authors directly, hopefully they will reply and be able to help you.

You can start from this article (Mike J. Danielson, Corrosion Science 2002 44 (4), pp. 829-840) http://www.sciencedirect.com/science/article/pii/S0010938X01001032. 
The author made his own DS cells as described follow