We pause this Memorial Day to honor and remember those that gave their lives in service to our country.

Our offices will close at 1 p.m. on Friday, May 22nd and reopen on Tuesday, May 26th.

MDI Mercury Relays

MDI manufacturers mercury relays and also offers a complete line of level controls, SSRs and switches.

Their contactors are rated from 30 to 100 amps and are encased in hermetically sealed stainless steel tubes to provide reliable switching for millions of operations.

MDI was founded in 1975, remains family owned and is manufactured right in Michigan.

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