Originally Posted by Duncan Price
Do you have details of where you can get them as I would be interested in trying one out.
This is the one I was looking at: Porter Parker VCD 1000 Variable Constant Differntial Flow Controller VCD1000 | eBay
Just be careful because there are different elements screwed into the bottom, if you download the datasheet you can see which one it is. The guy in the states used a -400 element
Most of the scrubber design was influenced by this chap
Homebuilt Meg Radial Scrubber - Rebreather World