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    MDI

    Mercury Displacement Industries or known better as MDI Inc. Got our start in 1975 as a small family owned business. Specializing in producing mercury relays and other mercury related products. In 1990, MDI added mercury floats to its list of manufactured products. MDI quietly became a leader for both relay and float switches.

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    Picture of DAMPER ARM TILT SWITCH

    DAMPER ARM TILT SWITCH

    MERCURY DISP:SP-1442-L6
    SKU: MERCURY DISP:SP-1442-L6
    $136.94
    Picture of DAMPER SWITCH

    DAMPER SWITCH

    MERCURY DISP:SP-1162
    SKU: MERCURY DISP:SP-1162
    $114.92
    Picture of FLOAT SWITCH

    FLOAT SWITCH

    MERCURY DISP:CM1OY2000
    SKU: MERCURY DISP:CM1OY2000
    $117.92
    Picture of MDI 2-POLE 30AMP 208/240V

    MDI 2-POLE 30AMP 208/240V

    MERCURY DISP:230NO-220AU
    SKU: MERCURY DISP:230NO-220AU
    $122.25
    Picture of MDI CONTACTOR

    MDI CONTACTOR

    MERCURY DISP:335NO-24A
    SKU: MERCURY DISP:335NO-24A
    $181.82
    Picture of MDI CONTACTOR

    MDI CONTACTOR

    MERCURY DISP:335NO-120A
    SKU: MERCURY DISP:335NO-120A
    $181.82
    Picture of MDI CONTACTOR STEEL STRAP

    MDI CONTACTOR STEEL STRAP

    MERCURY DISP:335NO-24-18
    SKU: MERCURY DISP:335NO-24-18
    $181.82
    Picture of MDI MERC CONTRACTOR 220V

    MDI MERC CONTRACTOR 220V

    MERCURY DISP:35NO-220AL-1M
    SKU: MERCURY DISP:35NO-220AL-1M
    $149.06
    Picture of MDI MERCCONTACT 120VACN/CTOPTR

    MDI MERCCONTACT 120VACN/CTOPTR

    MERCURY DISP:35NC-120AT
    SKU: MERCURY DISP:35NC-120AT
    $75.84
    Picture of MDI MERCCONTACTOR 24VDC

    MDI MERCCONTACTOR 24VDC

    MERCURY DISP:35NO-24DH
    SKU: MERCURY DISP:35NO-24DH
    $65.95
    Picture of MDI MERCCONTACTOR120VACTOPTERM

    MDI MERCCONTACTOR120VACTOPTERM

    MERCURY DISP:35NO-120A
    SKU: MERCURY DISP:35NO-120A
    $65.95
    Picture of MDI MERCCONTACTOR120VACTOPTERM

    MDI MERCCONTACTOR120VACTOPTERM

    MERCURY DISP:35NO-120AT
    SKU: MERCURY DISP:35NO-120AT
    $70.28
    Picture of MDI MERCCONTCR 24V N/O TOPTERM

    MDI MERCCONTCR 24V N/O TOPTERM

    MERCURY DISP:35NO-24ATU
    SKU: MERCURY DISP:35NO-24ATU
    $80.63
    Picture of MDI MERCURY CONTACTOR 24V

    MDI MERCURY CONTACTOR 24V

    MERCURY DISP:L35NO-24A
    SKU: MERCURY DISP:L35NO-24A
    $61.88
    Picture of MDICONTACTOR 2 PULL,30AMP,120V

    MDICONTACTOR 2 PULL,30AMP,120V

    MERCURY DISP:230NO-120A
    SKU: MERCURY DISP:230NO-120A
    $99.89
    Picture of MECHANICAL DAMPER ARM SWITCH

    MECHANICAL DAMPER ARM SWITCH

    MERCURY DISP:SP-1347-L6
    SKU: MERCURY DISP:SP-1347-L6
    $117.92
    Picture of MECHANICAL FLOAT SWT 120V 13A

    MECHANICAL FLOAT SWT 120V 13A

    MERCURY DISP:GT30T2001
    SKU: MERCURY DISP:GT30T2001
    $121.11
    Picture of MERCURY CONTACTOR,24VAC,N/O,1P

    MERCURY CONTACTOR,24VAC,N/O,1P

    MERCURY DISP:35NO-24AT
    SKU: MERCURY DISP:35NO-24AT
    $67.98
    Picture of MERCURY RELAY,2 POLES,30A,120V

    MERCURY RELAY,2 POLES,30A,120V

    MERCURY DISP:230NO-120A-18
    SKU: MERCURY DISP:230NO-120A-18
    $121.64
    Picture of N/C YELLOW FLOAT SWITCH

    N/C YELLOW FLOAT SWITCH

    MERCURY DISP:EB1CW1404
    SKU: MERCURY DISP:EB1CW1404
    $62.58
    Picture of N/O BLACK FLOAT SWITCH

    N/O BLACK FLOAT SWITCH

    MERCURY DISP:EM10W2504
    SKU: MERCURY DISP:EM10W2504
    $72.67
    Picture of SINGLE POLE NORMALLY OPEN 24V

    SINGLE POLE NORMALLY OPEN 24V

    MERCURY DISP:35NO-24A
    SKU: MERCURY DISP:35NO-24A
    $73.46
    Picture of SPNO 24V MERC CONTACTOR FASTON

    SPNO 24V MERC CONTACTOR FASTON

    MERCURY DISP:35NO-24AF
    SKU: MERCURY DISP:35NO-24AF
    $78.59
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