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Signal drifting/EM signal/Faraday cage/metal box with connector

Discussion in 'General Electronics Discussion' started by Chengjun Li, Apr 25, 2016.

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  1. Chengjun Li

    Chengjun Li

    84
    7
    Oct 21, 2014
    Hi,

    I am using a evaluation board to measure extreme small differential capacitance on the aF scale. I always got a drifting output, although the speed of drift is slow. I think this might due to the influence of environmental EM signal. I want to use a faraday cage to isolate the EM signal. The faraday cage is better to have connectors on it. I used to see somebody else use a metal box with connectors on it, but I don't know how it is called. Does anyone know where can I buy such a box or what it is named? I didn't find any item by typing faraday cage on DIGIKEY.

    Thanks,
     
  2. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    They are called "EMI/RFI shielded boxes",mostly of aluminum.
    You can make one yourself for much less,use any tin box and add the connectors you need for signals.
    and feed-through caps for power.
     
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