Electronic – How to reduce sensitivity of a Hall Effect Sensor

hall-effectsensitivitysensor

In a mechanism with strong magnets, I want to use a Hall Effect Sensor to get the position of the magnets. The sensor move between two magnets in inverse polarity, so the field is minimum in on side, Zero in the middle and maximum in the other side.

Hall Effect Sensor

Hall effect sensor

Searching on internet, Hall Effect Sensors goes from around -0.07 to + 0.07T, but that is too sensitive and the sensor is saturated most of the time (0V or 5V). (I made tests with the Honeywell SS495A.)

How could I reduce the sensitivity of the Hall Effect Sensor to record stronger magnetic fields?

Note: Because of the design of the device, it is not easy to move the sensor further away of the magnets.

Best Answer

How could I reduce the sensitivity of the Hall Effect Sensor to record stronger magnetic fields?

Use a small piece of iron to bridge betweeen the magnet poles - this will reduce the flux density seen by the Hall sensor. It can be placed close to the magnets or close to the sensor. A little bit of experimentation will be required.