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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

LIGHTINGGENERAL APPLICATIONSELECTRIC HEATERS
Auditorium LightingAir ConditioningBaseboard Heaters
Alarm SystemsBlow Molding
Copy EquipmentAutomatic Door ClosersCabinet Heaters
Dimmer ControlsBattery ChargersChemical Tank Heaters
Display SignsBlue Print MachinesCuring Furnaces
Emergency LightingCopiersDrying Ovens
Flood LightsComputer Power SuppliesDuct Heaters
High Intensity LampsCorrosive LocationsFilm Packaging
Hospital LightingDusty, Oily LocationsGlass Furnaces
Lighting Test PanelsDry Cleaning EquipmentHeat Lamps
Mercury Vapor LampsEnergy Management SystemsHeat Sealing Machines
Parking LotsFarm Incubators & BroodersInduction Heater
Photography LightingHigh Cycle Rate ApplicationsIndustrial Ovens
Low Voltage SwitchingInfrared Heaters
ScoreboardsMarking & Engraving EquipmentInk Drying
Sodium Vapor LampsMotor StartingInk Heating
Stage LightingSoldering SystemsInjection Molding Machines
Street LightingKilns
Telephone SwitchingLab Ovens
Tower LightsTest PanelsPackaging Equipment
Traffic SignalVapor DegreasersPlastic Extruders
Tungsten LampsX-Ray Machine Controls
Quartz Heaters
Radiant Heaters
Roop Top Heating
Shrink Tunnels
Unit Heaters
Vacuum Forming

FOOD INDUSTRY EQUIPMENT (HEATERS)

SPECIALTY APPLICATIONS
Baking OvensCapacitor Discharge Systems
Coffee UrnsHazardous Locations
Deep Fryers
DishwashersPhase Converters
Electric Grills
Electric Ranges
Pizza Ovens
Steam Generators