Reed Relays and
Electronics India Limited
Manufacturer of Reed Switches, Reed Sensors and Reed-based products
Reed Relays and Electronics India Limited Incorporated in 1971
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Contact Gap

Contact gap, measured in microns, is the distance between the mating reed blades of a Reed Switch in open state. Several factors affect the contact gap of a Reed Switch. Although a Reed Switch having a lower Operate AT should have a smaller gap and a Reed Switch having a higher Operate AT should have a corresponding higher gap, this is not so. Reed Switches in longer glass tubes, consequently having more flexible blades will have a larger contact gap than a smaller reed switch with a shorter glass tube, even though they may have the same Operate AT.

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