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Current Bid: $200.00
Highest Bidder: Harold Arlen
Product Code: NCDK
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  Highest Bidder: Fran Allison
  Product Code: CPZC
 
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Auction ID:  14
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Switch JOIN NOW
Price:
$180.00
incl. VAT, excl. delivery
Winner:
jack.mclash
 
00:00:00

Worth up to:

$220.00
Placed bids:
Final price: $180.00
Savings: $0.00
   
   
 
 
 
Product Details
 
 
Switch

Description:

A MAGNETIC FIELD (from an ELECTROMAGNET or a PERMANENT MAGNET) will cause the contacts to pull together, thus completing an electrical circuit. The stiffness of the reeds causes them to separate, and open the circuit, when the magnetic field ceases. Another configuration contains a non-ferrous normally-closed contact that opens when the ferrous normally-open contact closes. Good electrical contact is assured by plating a thin layer of precious metal over the flat contact portions of the reeds; low-resistivity silver is more suitable than corrosion-resistant gold in the sealed envelope. There are also versions of reed switches with mercury "wetted" contacts. Such switches must be mounted in a particular orientation otherwise drops of mercury may bridge the contacts even when not activated.

Since the contacts of the reed switch are sealed away from the atmosphere. The hermetic sealing of a reed switch make them suitable for use in explosive atmospheres where tiny sparks from conventional switches would constitute a hazard.

 
 
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