What's the name of this electrolysis device?

I've seen it in a couple of videos, it's used to electrolyze water in 2 different containers at the same time to make a comparison and thus is very handy. 


What is it called (besides just a hydrolizer)? 
![http://i1274.photobucket.com/albums/y432/mocDOTtekcubotohp/hydrolizer_zps38a63656.jpg](https://i.stack.imgur.com/buWWA.jpg)




Based on [this article](http://onlinelibrary.wiley.com/doi/10.1002/elan.201100346/abstract), in which the authors describe a system that can do 25 cells simultaneously, the term 'Parallel Electrolyser' would seem appropriate.


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It's a precipitator, also known as TDS indicator.


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