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Mercury relays? (UPDATED: Pics post #20)

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  1. 12-29-2015, 09:34 PM #6
    alloy2
    alloy2 is offline Metal Recycling Entrepreneur
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    Quote Originally Posted by ScrappinRed View Post
    I have a lot of boards with relays, but I have no idea how to know if they are mercury or not. I look forward to anyone posting pics and identification details...

    I have a lot of relays that look like this:





    ...and I think they are not mercury... ?
    No mercury in this type of relay, most have silver alloy bonded onto the contact face while those used in sever elements for example Thermo King truck reefers or from relays used in a PLC ( programmable logic controller ) used in a harsh environment would have gold alloy bonded onto the face of the contacts.

    PLC Logic Board, these come in may different arrangements and styles,

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