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MDI mercury contactors/relays are durable and float switches and liquid level controls for water and sewage Liquid Level Control Floats
Contactors and Solid State Relays,
Tilt, Tip-over and Proximity Switches
Motion and Shock Sensors.
MDI Mercury Displacement Industries Relays, Contactors, Liquid Level Control Floats, Tilt and Tipover switches
Mercury Displacement Industries Relays, Contactors, Liquid Level Control Floats, Tilt and Tipover switches
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Relay, Vertical, Liquid Level Control Floats, Tilt and Tipover switches
 At Mercury Displacement Industries we manufacture Liquid Level Controls in Wide and Narrow angle mechanical or mercury type floats. A wide variety of High Temperature floats, Vertical floats, and cord sets available. We supply OEM's, Plumbing Supply companies, Contractors, Municipal Sewage Treatment plants, and Control Panel Specialists. We also manufacture Mercury Contactors, Relays, Tilt Switches, Solid State Relays and Timers. Please call us at (800) 634-4077 / (269) 663-8574, Fax (269) 663-2924, see below, or email us.

MDI's New Featured Products!
2 & 3-Phase Solid State Relay Hockey Puck Solid State Relay
Three Phase - Solid state - 3PSS60A75 S
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Larger Image		 Single Pole - Single Throw - HPR25A
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Detailed Ratings
More Info! More Info!
Buy Hockey Puck Relays Now!
P/N: 3PSS Series (3-Phase Relay)
    Suffix "S" Includes: Heatsink, Fan,
    and Din-Rail mount
    Suffix "R" (Retro Fit) Includes: The "S" package
    with MDI 2 & 3 Pole backplate for easy drop in
Input range:
24-275 VAC/24 - 50 VDC
Operational ratings:
Up to 75 AMPS rms @ 600 VAC
  Tested and Approved
  3 Pole 50 AMP @ 480 VAC @ -30°C to 50°C 3-Phase
  2 Pole 75 AMP @ 480 VAC @ -30°C to 50°C 3-Phase *
    51°C to 80°C derates @ 10 AMPS per decade
      *For 2 Pole usage, use L1 & L3
Non-repetitive voltage:
1150 Vp
Opto-insulation:
> 4000 VACrms		 P/N: HPR Series (Hockey Puck Relay)
2 input ranges:
4.5 - 32 VDC &
20-280 VAC/22 - 48 VDC
Operational ratings:
Up to 75 AMPS rms @ 480 VAC
Non-repetitive voltage:
1200 Vp
Opto-insulation:
> 4000 VACrms
 Mercury Relays, Contactors, SSRs, Timers or Tilt Switches.
  • Ratings up to 100 AMP.
  • 1 through 4 pole configurations.
  • The best relay for heater loads.
  • Coil voltages up to 600 volts.
  • Hermetically sealed contacts.
  • Suitable for resistive, capacitive and inductive loads.
  • Various size and AMP rated Tilt Switches
  • Solid State Relays up to 70 AMP
  • Many other options available.
Back to the top		 Mechanical and Mercury Liquid Level Control floats.
  • Ratings up to 2HP or 25 AMP.
  • High Impact Polystyrene, ABS or High Temperature Polycarbonate ABS rated up to 221°F.
  • Any cord length available. UL Max. 50'
  • 120VAC and 240VAC series plugs, 3 pin barrel plug, or standard skive available.
  • External weights or internally weighted floats.
  • Vertical and Twin Floats Switches
  • Many other options available.
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For Liquid Level Control Floats, Contactors and Solid State Relays, Tilt, and Tipover contact MDI TODAY!

* P. O. Box 710 * 25028 U.S. 12 East * Edwardsburg, Michigan * 49112 *
* PH. (269) 663-8574 * FX. (269) 663-2924 *
* Toll Free US and Canada (800) 634-4077 *