Currently some transducer outputs through BNC connectors are directly coupled to a data acq. hardware's inputs.
I want to install low-pass filters right before the data acq. inputs and for the passive filter I want to use an interface as shown below:
Sometimes I see they use aluminium enclosures for such purposes.
My question is that, does it matter whether the enclosure is aluminum or plastic? Would the enclosure material have impact on 50Hz magnetic pickup?