The ZRA FlatCell is a modified IPS FlatCell. The basic idea is to use this cell to measure the short-circuit current between two samples.
This allows a working electrode to be connected on both sides and then connected to a ZRA to measure the short-circuit current. Of course, this arrangement can also be used to measure electrochemical noise.
It is also conceivable to attach a counter electrode on one side and a working electrode on the other. The filling opening can be used to immerse a reference electrode. This would make this cell a completely normal, non-heatable flat cell.