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Off-hook Switching

Introduction

In the past, disconnecting a telephone connection required the placement of the handset on the receiver.  This placement activated a mechanical switch which created the electrical disconnect.  The mechanical switch is subject to any spillage or debris clogging the contacts which will affect the reliability of the electrical on/off connection.  Standex Electronics has developed several packages that use hermetically sealed Reed Switches that completely eliminate this reliability issue…

Full Application Write Up
Off Hook Switching application

Features

  • Contacts dynamically tested
  • The reed contact can be sealed in the casing of the receiver
  • Large sensing distances possible
  • Magnet and switch are isolated by having the magnet mounted in the hand set and the reed switch mounted in the receiver
  • Magnet is not affected by the environment
  • Millions of operations reliably out performing the life of the telephone
  • Not affected by rough treatment
  • Reed contact never comes in contact with the outside environment
  • Reed switch is hermetically sealed
  • Surface mount, through hole and screw fastening mounting

 

SeriesDimensionsmminchesIllustration
MK15W2.50.098 MK15 Reed Sensor
H2.50.098
L19.500.768
MK16W2.30.091 MK16 Reed Sensor
H2.30.091
L15.600.614
MK17W2.10.083MK17 Reed Sensor
H2.10.083
L9.610.378
MK22W2.70.106 MK22 Reed Sensor
H2.30.091
L15.600.614
MK23-35W2.20.087 MK23-35 Reed Sensor
H1.950.077
L15.750.620
MK23-66W2.20.087 MK23-66 Reed Sensor
H2.70.106
L19.600.772
MK23-87W2.00.079 MK23-87 Reed Sensor
H2.10.083
L15.600.614
MK23-80W2.00.079 MK23-80 Reed Sensor
H2.10.083
L13.00.512
MK24W2.20.086 MK24 Reed Sensor
H1.80.070
L5.50.216
SeriesDimensionsmminchesIllustration
MK03Dia5.800.244
MK03 Reed Sensor

M03 magnet not included

L25.51.004
MK14Dia40.157 MK14 Reed Sensor
L25.51.004
MK18Dia50.197 MK18 Reed Sensor
L170.669
MK20/1Dia2.720.107 MK20/1 Reed Sensor
L100.394

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