Mercury Relays

(a.k.a. mercury contactor, mercury displacement relay)

The basics: mercury relays use mercury as the switching element and are able to handle constant cycling. MDI relays are hermetically sealed with high quality glass to metal seals and the stainless steel tube is totally encapsulated in UL approved epoxy. Mercury relays are known for being durable and handling difficult and dirty environments. Solid state relays are also a popular option as some states have banned the use of mercury.
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