MDI WasteWater, Liquid Level Controls, Mercury Relays, Solid State Relays and Switches
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  • Level Controls & Panels
    • Mercury Hg Floats
      • Mini Pilot Duty | Control Floats
      • Pilot Duty | Control Floats
      • Pump Duty Intermediate Angle Floats
      • Pump Duty Wide Angle Floats
      • Foam-Filled Mercury Sewage Floats
    • Mechanical Floats
      • Mini Floats
      • Pump Duty Wide Angle Floats
      • Pump Duty Narrow Angle Floats
      • Heavy Duty Floats
      • Pilot Duty | Control Floats
      • Internally Weighted | Tetherless Floats
      • Gold Plated Contact Floats
      • High Amp - 25 AMP Floats
      • High Temperature Floats
    • Avocado Mercury Floats
      • Avocado Pilot Duty | Control Floats
      • Avocado Pump Duty Wide Angle Floats
      • Avocado Internally Weighted | Tetherless Floats
    • Avocado Float Switches
      • Avocado Pump Duty Wide Angle Float
      • Avocado Pump Duty Narrow Angle Float
      • Avocado Heavy Duty Float
      • Avocado Pilot Duty | Control Floats
      • Avocado Internally Weighted | Tetherless Floats
      • Avocado Gold Plated Contact Floats
      • Avocado High Amp - 25 AMP Floats
      • Avocado High Temperature Float
      • Avocado Floats DPST | DPDT
    • Avocado Double Float Switch
    • Optical Float®
    • Vertical Switch
    • Stainless Steel Floats
    • Indoor & Outdoor Alarms
    • Control Panels
    • Enclosures & Boxes
    • Float Accessories
    • Installation Guides
      • Float Installation Guide
      • Alarm Installation Guide
  • Pumps & Basins
    • Basin Packages
    • Septic & Pump Tanks
    • Grinder Pumps & Retrofits
      • Grinder Pumps
      • Retrofits
    • Non-Clog Pumps
    • Shredder Pumps
    • Effluent, Sump & Sewage
      • Effluent Pumps
      • Sump Pumps
      • Sewage Pumps
    • Miscellaneous Accessories
      • Base Elbows
      • Lift-Out Flanges
      • Chains & Components
      • Basin Accessories
      • Guide Brackets
      • Pump & Piping Components
    • Pump Repair
      • General Information
      • Preventive Maintenance
      • Sump and Sewage Pump Repair
      • Well Pump Pump Repair
      • Sprinkler and Irrigation Pump Repair
      • Grinder Pump Repair
      • Cutter | Chopper | Shredder Repair
  • Solid State Relays
    • Single Pole SSR Series
      • SS20 Series
      • SS30 Series
      • SS40 Series
      • SS60 Series
      • SS90 Series
    • HPR Series
      • 25 AAC Relays
      • 50 AAC Relays
      • 75 AAC Relays
      • 100 AAC Relays
      • 3 Pole HPR Series
    • HPRs for DC Loads
    • 2 & 3 Pole Series
      • Mercury Free 35A, 60A & 100A Retrofit
      • 2 Pole Series
      • 3 Pole Series
    • Misc. Solid State
      • Switching Power Supply
      • Heater Burnout Relays
      • Temperature Controller
      • Fuses
  • Switches
    • Tilt Switches
      • Mercury Free Switches
      • Mercury Switches
    • Damper Arm Tilt Switch
      • Mercury Free Switches
      • Mercury Switches
    • Tip-Over Switches
      • Mercury Free Switches
      • Mercury Switches
    • Limit Switch
    • Clamps & Clips
  • Mercury Relays
    • Single Pole Relays
      • Single Pole 30 AMP Relays
      • Single Pole 35 AMP Relays
      • Single Pole 35 AMP T-Top Relays
      • Single Pole 60 AMP Relays
      • Single Pole 100 AMP Relays
    • Two Pole Relays
      • Two Pole 30 AMP Relays
      • Two Pole 35 AMP Relays
      • Two Pole 35 AMP T-Top Relays
      • Two Pole 60 AMP Relays
      • Two Pole 100 AMP Relays
    • Three Pole Relays
      • Three Pole 30 AMP Relays
      • Three Pole 35 AMP Relays
      • Three Pole 35 AMP T-Top Relays
      • Three Pole 60 AMP Relays
      • Three Pole 100 AMP Relays
    • Four Pole Relays
      • Four Pole 35 AMP Relays
      • Four Pole 60 AMP Relays
      • Four Pole 100 AMP Relays
    • Information & Restrictions
    • Miscellaneous Products
      • Miscellaneous Products
      • Fuses
  • Non-Mercury Relays
    • Three Pole MIDI Relays
    • Three Pole Definite Purpose Relays
    • Fuses

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Phone (269) 663-8574
Toll Free (800) 634-4077
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MDI Inc.
P.O. Box 710
25028 U.S. 12 East
Edwardsburg, Michigan 49112

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