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• Products
  • MDI Mercury Relays
    • Standard Relays
    • Traffic Control Relays
  • Mechanical and Mercury (Hg) Floats
    • Mechanical Floats
    • Mercury Floats
    • Specialized Floats
      • High Temperature
      • High Ampere
      • Intrinsically Safe
      • Mini Mechanical
    • Vertical Switch
    • Twin Float Switch
    • Hg Sewage Float
    • Float Trees
    • Sway Rings
    • Float Weight Kit
    • Tether Clamp
  • Sump, Sewage and Basins
    • Custom Basin Packages
    • 2 HP Dual Seal Grinder Pump
      • G2-11SI Int. Start
      • G2-21SI Int. Start
      • G2-21SE Ext. Start
      • E/One Replacement
    • Other Pumps (Effluent, Grinder & Utility)
      • Sewage - 93501
      • Utility - 91331
      • Effluent - 92305
      • Effluent - 92505
  • MDI ETO Hybrid Timers
  • Solid State Relays & Power Supplies
    • SSR Hockey Puck Relays (HPR)
      • HPR48A25
      • HPR48D25
      • HPR48A50
      • HPR48D50
      • HPR48A75
      • HPR48D75
    • SSR 3-Phase Series 2 & 3 Pole
    • MDI Solid State Relays
      • SS20AE
      • SS20AU
      • SS20DU
      • SS30AU
      • SS30DU
      • SS50AE
      • SS50AU
      • SS50DU
      • SS70AU
      • SS70DU
    • Switching Power Supply
  • MDI Switches
    • Standard Switches
    • SP-1162 Damper Switch
    • SP-1326 and SP-1327 - Product Info & Outline Drawings
  • Indoor/Outdoor - High/Low Water Alarm
    • Indoor Water Alarm
    • Outdoor Tank Alarm
    • Wireless Tank Alarm
  • Active Switch and Sensor
    • Tilt & Tipover
    • Switches
    • Motion & Shock
    • Proximity
  • Mercury Clean Up Kit

• Product Forms, FAQ's, & MDI Catalog "X"
  • Downloadable Forms (All forms are in PDF format)
    • MDI Return Form
    • MSDS Sheet
    • Mercury Cleanup Instructions
    • Solid State Relay (SSR) Spec Sheet
    • Hockey Puck Relay (HPR) Spec Sheet
    • 3PSS Spec Sheet
    • 1 Pound 4 Ounce Float Weight
    • Float Tether Clamp
    • Grinder Pump Flyer
    • Basin Package Example
    • E-One Turnkey Replacement
    • MDI Catalog "X"
  • Frequently Asked Questions
    • MDI Return Form
    • MSDS & Relay Disposal
    • MDI, Inc. Our Company & Quality Policy
    • Float Installation Guide
    • Water Alarm Installation Guide
  • MDI Catalog "X"

• Outlines & Drawings
  • MDI Outlines
    • Relay Outlines
      (All drawings are in PDF & DXF AutoCAD R.14 types)
      • 30 AMP Relay
      • 2 Pole 30 AMP Relay
      • 3 Pole 30 AMP Relay
      • 35 - 60 AMP Relay
      • 2 Pole 35 - 60 AMP Relay
      • 3 Pole 35 - 60 AMP Relay
      • 4 Pole 35 - 60 AMP Relay
      • 100 AMP Relay
      • 2 Pole 100 AMP Relay
      • 3 pole 100 AMP Relay
    • Tilt Switch & Tip-Over Switch Outlines
      (All drawings are in PDF & DXF AutoCAD R.14 types)
    • Float Drawings
      (All drawings are in PDF & DXF AutoCAD R.14 types)
    • Misc. Floats, Switches, SSR and Relay Spec Sheets & Drawings
      (All drawings are in PDF ONLY)

• Online Shopping & Quotes
  • MDI Online Store
    • Floats (10 Different Products)
    • Water/Tank Alarms (3 Different Products)
    • Relays/Contactors (19 Different Products)
    • Switches (4 Different Products)
    • Active Switch (30 Different Products)
    • Heated Mats (7 Different Products)
    • Power Supplies (1 Different Products)
    • Special Products (5 Different Products)
    • Misc. Products (31 Different Products)
  • MDI Online Price Quotes
    • Float Quote Form
    • Vertical Switch Quote Form
    • Relay Switch Quote Form
    • Solid State Relay (SSR) Quote Form
    • Twin Float Quote Form
    • Active Switch and Sensor Quote Form
    • Standard Quote Form

• Miscellaneous & Contact Information
  • MDI Contact Form
  • Links