Magnetic Sensors

Todays modern, high tech fuel control sensor comes in many shapes and sizes but they all accomplish the same thing. That is to gage the flow of fuel in a controlled system. Of course, what comes to mind first is fuel burning engines. However; they are used in a variety of applications such as at your local gas station, to gage how much gas you are pumping when you fill your tank.

Its All Thanks to Magnets

So how does a fuel control sensor actually measure how much fuel is moving through a conduit? The truth of the matter is that magnets are used to gage the rotations of a turbine blade that the fuel spins as it passes through it. Well how does this happen?

Magnets and Electricity

Its called the “Hall effect”. The Hall effect was discovered in the late 1800s and describes an electrical phenomena that transpires in an electrical current that is running perpendicular to a magnet when the magnet is reacting to the presence of ferrous metal such as iron or steel.

A Spinning Turbine Blade

By using a sensor that has a magnet or magnetized material in it, such as silica, the speed of the fuel powered turbine can be determined. Every time a blade in the turbine passed the magnetized sensor, an electrical impulse is sent out. In this way the actual amount of fuel that is passing through a conduit can be determined.

High temperature Fuel Control Sensors

Magnetic fuel control sensors have completely done away with the need for cables or any other type of extraneous mechanical devices for determining fuel flow rates. Also, new high temperature fuel control sensors are now made from ceramics and special high tech allows that can withstand temperatures that would turn a standard fuel control senor into a puddle of melted metal.

Watch the video related to magnetic sensors

opensensor realization of the magnetic sensor with mobile phone screen

Help answer the question about magnetic sensors

How do you create a magnetic sensor? Something that simply outputs voltage every time a magnet passes it.?
I don't really want it to vary with the intensity of the magnetic field, only to output a set voltage after a certain magnetic field has been reached.

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Article by Rosa Telipten. Here you will find everything you wanted to learn regarding Fuel Control Sensors and even Hydraulic Motor Speed Sensor