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FAQ – Magnetic proximity sensors

1) What is working principle of a magnetic proximity sensors ?

It is based on an electronic or mechanical principle detecting a magnetic field.
It can detect with no contact the presence of a magnet and gives an ON-OFF signal to the control system.

2) Which level sensors can work in a chlorine liquid ?

Level sensors in polyamide can be used in low chlorine water only (like swimming-pool).
In this kind of liquid this is better to use polypropylene level sensors.

See PDF

3) What to do when liquid is not still while lawn mover is moving ?

For this kind of problem you have to put the sensor into a system anti wave.
This system is made by a closed tube with 2 holes (for air evacuation when the level goes up inside tube).
Smaller the holes are; bigger is the difference between real level of tank and level inside the tube.

4) Avantages des capteurs à ampoule REED ?

Main advantages are the following:

  • No power supply is needed. There is no power consumption when the switch is OFF and it provides a real galvanic insulation. There is no voltage drop at ON state.
  • It can be used in harsh environment: dust, water, …
  • Distances for detection can be very large. This depends on the REED switch sensitivity, but mainly on the magnet.
  • Very price effective compared to all of the existing technologies.

 

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