Immersion Heaters
Tubular Heaters
Finned Tubular Heaters
CalRod® Heaters
Mould Heaters
Duct Heaters
Tank Heaters
Cartridge Heaters
Band Heaters
Strip Heaters
Radiant Heaters
Temperature Controls
Thermocouples & RTD’S
Mercury Relays
  Solid State Relays
Drum Heaters
Silicone Rubber Heaters
Technical Data

Mercury relays offer much faster switching than mechanical contactors, and though not as fast as solid state devices, are far more economical and can be mounted in a smaller foot print. Mercury relays 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 de-rating 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.

Single Pole Dimensions
Double Pole Dimensions
Triple Pole Dimensions





Bold numbers indicate stocked items.

Please contact us for items with non-standard amperages
or coil voltages. Many configurations available.