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Constructed with a cast iron housing (or malleable iron)
a reading outside the 39-70 ohm range typically indicates a hairline fracture or "dead patch" in the element
Check for continuity across the terminals while the system is under standing pressure
Common Questions Is the 8201-045BX a direct drop-in for the older 8201-045 model
MDI Mercury Displacement 35NO-120AT Contactor 326010-701 Constructed with a cast ironProfessional grade MDI Mercury Displacement 35NO 120AT Contactor is designed for high cycle industrial applications where mechanical relays fail. This single pole normally open contactor features a 120V AC coil and is rated for 35 Amp resistive loads, making it the standard for electric heat control and industrial processing equipment. Unlike standard electromagnetic contactors, the MDI 35NO 120AT utilizes a hermetically sealed liquid mercury contact