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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 120V 30A 1POLE N/O CONTACTOR

    120V 30A 1POLE N/O CONTACTOR

    MERCURY DISP:30NO-120A
    SKU: MERCURY DISP:30NO-120A
    $56.23
    Picture of 24VAC1-POLE30AMPN/O CONTACTOR

    24VAC1-POLE30AMPN/O CONTACTOR

    MERCURY DISP:30NO-24A
    SKU: MERCURY DISP:30NO-24A
    $56.23
    Picture of MDI MERCURY CONTACTOR 24V

    MDI MERCURY CONTACTOR 24V

    MERCURY DISP:L35NO-24A
    SKU: MERCURY DISP:L35NO-24A
    $61.88
    Picture of N/C YELLOW FLOAT SWITCH

    N/C YELLOW FLOAT SWITCH

    MERCURY DISP:EB1CW1404
    SKU: MERCURY DISP:EB1CW1404
    $62.58
    Picture of 1POLE 35AMP N/O 24V COIL

    1POLE 35AMP N/O 24V COIL

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

    MDI MERCCONTACTOR120VACTOPTERM

    MERCURY DISP:35NO-120A
    SKU: MERCURY DISP:35NO-120A
    $65.95
    Picture of MDI MERCCONTACTOR 24VDC

    MDI MERCCONTACTOR 24VDC

    MERCURY DISP:35NO-24DH
    SKU: MERCURY DISP:35NO-24DH
    $65.95
    Picture of 24VDC 35A 1P CONTACTOR

    24VDC 35A 1P CONTACTOR

    MERCURY DISP:35NO-24DT
    SKU: MERCURY DISP:35NO-24DT
    $67.98
    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 MDI MERCCONTACTOR120VACTOPTERM

    MDI MERCCONTACTOR120VACTOPTERM

    MERCURY DISP:35NO-120AT
    SKU: MERCURY DISP:35NO-120AT
    $70.28
    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 MDI MERCCONTACT 120VACN/CTOPTR

    MDI MERCCONTACT 120VACN/CTOPTR

    MERCURY DISP:35NC-120AT
    SKU: MERCURY DISP:35NC-120AT
    $75.84
    Picture of SPNO 24V MERC CONTACTOR FASTON

    SPNO 24V MERC CONTACTOR FASTON

    MERCURY DISP:35NO-24AF
    SKU: MERCURY DISP:35NO-24AF
    $78.59
    Picture of 24VDC 35A 1P CONTACTOR

    24VDC 35A 1P CONTACTOR

    MERCURY DISP:35NO-24DTB
    SKU: MERCURY DISP:35NO-24DTB
    $80.63
    Picture of 120V 35A N/O TOP TERM. CNTCTR

    120V 35A N/O TOP TERM. CNTCTR

    MERCURY DISP:35NO-120ATB
    SKU: MERCURY DISP:35NO-120ATB
    $80.63
    Picture of 120V 35A 1P N/O CONTACTORW/BKT

    120V 35A 1P N/O CONTACTORW/BKT

    MERCURY DISP:35NO-120ATU
    SKU: MERCURY DISP:35NO-120ATU
    $80.63
    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 277V 35A N/O 1P CONTACTOR

    277V 35A N/O 1P CONTACTOR

    MERCURY DISP:35NO-277AH
    SKU: MERCURY DISP:35NO-277AH
    $91.23
    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 DAMPER SWITCH

    DAMPER SWITCH

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

    FLOAT SWITCH

    MERCURY DISP:CM1OY2000
    SKU: MERCURY DISP:CM1OY2000
    $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 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 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 BLUE ABS FLOAT RATED N/C 180F

    BLUE ABS FLOAT RATED N/C 180F

    MERCURY DISP:JE62CW1000-W
    SKU: MERCURY DISP:JE62CW1000-W
    $122.43
    Picture of 2P 24V 35A N/O TOPTERMCONTACTR

    2P 24V 35A N/O TOPTERMCONTACTR

    MERCURY DISP:235NO-24AT-18
    SKU: MERCURY DISP:235NO-24AT-18
    $125.55
    Picture of 2P 35AMP 24VDC CONTACTOR

    2P 35AMP 24VDC CONTACTOR

    MERCURY DISP:235NO-24DT-18
    SKU: MERCURY DISP:235NO-24DT-18
    $125.55
    Picture of CONTACTOR,2PULL,35A,N/O

    CONTACTOR,2PULL,35A,N/O

    MERCURY DISP:L235NO-24AF
    SKU: MERCURY DISP:L235NO-24AF
    $129.77
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