Hall Effect Sensor Troubleshooting

Verify that the sensing target used is of the correct type for the sensor.

• Some Red lion sensors work only with ferrous containing targets Some will work with non-ferrous targets.

Replace the gear with one made of magnetic material, or replace the sensor with one that can detect non-ferrous materials as required.

Verify that the sensing gear has a proper pitch for the sensor.

• The larger the gear pitch value, the smaller the gear teeth will be.  The minimum gear pitch is the smallest size tooth that the sensor can detect. There must also be a gap between the targets (gear teeth) greater than or equal to the size of the target. Red Lion's Hess Sensors can detect gears as small as 24 D.P. or other ferrous targets with equal or greater dimensions. This information will be listed on the sensor datasheet. 

   

Replace the gear with one that has the correct pitch, or replace the sensor with one that can sense the existing gear as required.

Verify the air gap between the sensor and the gear.

• All Red Lion Hall Effect sensors have a maximum air gap specification. Please consult the datasheet for your sensor model. 

* note that a standard credit card is 0.03" thick

Correct the air gap as required

Verify that the gear is moving at the correct speed.

• All Red Lion Hall Effect sensors have a minimum and maximum speed rating. Consult the datasheet for your sensor model.  

   

• Make sure the sensor you have is rated for the speed range required for the application. 

Replace the gear, sensor, or monitoring device to achieve a working system.