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Mercury Displacement Relays are all designed and built to meet the most exacting demands of industry.  They have won their high place in the electrical field by doing the tough and tricky jobs that ordinary equipment could at best do in an uncertain manner.  They have proved their ability to stand up under the most adverse conditions of temperature, dust and moisture, in all types of applications.  All the care required for the manufacture of high-grade instruments is used in the manufacture of the switches.  All switch parts are specially cleaned, and contamination is avoided by use of tweezers, gloves, etc., when making assemblies.

Contactors are hermetically sealed with high quality glass to metal seals.
The stainless steel tube is totally encapsulated in high grade UL approved epoxy to prevent moisture damage and voltage breakdown through the protective coating.
The coils are wound on compact nylon bobbins and molded onto the metal tube to provide minimum power loss.  This allows for low coil power required to actuate the contactor.  This also enables the units to handle high loads with minimum derating due to higher ambient temperatures.
Inert gases internally prevent excessive arcing between the mercury and the electrodes which enables the unit to function for millions of cycles with very low contact resistance, and minimum deterioration of the internal parts.
Available in all standard coil voltages, in single, two and three pole arrangements.  Other coil voltages available upon request.
In multiple pole units each tube is actuated by its own coil.  This eliminates pull-in variation between contact tubes, assuring consistent switching.

TYPICAL APPLICATIONS
FOR MDIs MERCURY DISPLACEMENT CONTACTORS

LIGHTING GENERAL APPLICATIONS ELECTRIC HEATERS
Auditorium Lighting Air Conditioning Baseboard Heaters
Alarm Systems Blow Molding
Copy Equipment Automatic Door Closers Cabinet Heaters
Dimmer Controls Battery Chargers Chemical Tank Heaters
Display Signs Blue Print Machines Curing Furnaces
Emergency Lighting Copiers Drying Ovens
Flood Lights Computer Power Supplies Duct Heaters
High Intensity Lamps Corrosive Locations Film Packaging
Hospital Lighting Dusty, Oily Locations Glass Furnaces
Lighting Test Panels Dry Cleaning Equipment Heat Lamps
Mercury Vapor Lamps Energy Management Systems Heat Sealing Machines
Parking Lots Farm Incubators & Brooders Induction Heater
Photography Lighting High Cycle Rate Applications Industrial Ovens
Low Voltage Switching Infrared Heaters
Scoreboards Marking & Engraving Equipment Ink Drying
Sodium Vapor Lamps Motor Starting Ink Heating
Stage Lighting Soldering Systems Injection Molding Machines
Street Lighting Kilns
Telephone Switching Lab Ovens
Tower Lights Test Panels Packaging Equipment
Traffic Signal Vapor Degreasers Plastic Extruders
Tungsten Lamps X-Ray Machine Controls
Quartz Heaters
Radiant Heaters
Roop Top Heating
Shrink Tunnels
Unit Heaters
Vacuum Forming

FOOD INDUSTRY EQUIPMENT (HEATERS)

SPECIALTY APPLICATIONS
Baking Ovens Capacitor Discharge Systems
Coffee Urns Hazardous Locations
Deep Fryers
Dishwashers Phase Converters
Electric Grills
Electric Ranges
Pizza Ovens
Steam Generators