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Hot Tub Heating System Uses a Reed Sensor to Sense Water Flow

Introduction

The volume of hot tubs or spas are being used more and more around the world for medicinal reasons and for shear joy.  An essential part of a hot tub is its heating system.  There are very high wattage heaters that are designed into hot tubs for quick warm up.  If for some reason the water is not flowing and the heaters are activated, the heat would begin boiling and overheating of essential flow components resulting in some serious damage to the hot tub.  Hot tub designers have found a reliable solution using reed sensors…

Full Application Write Up
Heating Systems in Hot Tubes & Spas - Reed Sensor

Features

  • Magnet and Reed Sensor are isolated and have no physical contact by typically having the magnet mounted to a mini paddle wheel or spring and the Reed Sensor is mounted strategically such that the magnetic field of the magnet will sense the spring or paddle wheel
  • The reed switch used in the Reed Sensor is hermetically sealed and is therefore not sensitive to wet environments
  • The magnet is not affected by its environment
  • Tens of millions of reliable operations
  • Surface mount and through-hole packages available
  • Cylindrical hole and screw fastening mounting
  • Contacts dynamically tested

 

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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