AMR Sensors FAQ


What are the disadvantages of magnetic sensors?

They are more costly than mechanical switches. Depending on the usage, however, it can be more costly to use a mechanical switch to implement the same function, such as in applications that require waterproof structures and (labor for) positional adjustments. 
Additionally, magnets are necessary to switch on AMR sensors. Magnets are not available at Murata and therefore must be purchased from other suppliers. In some cases, magnets located in loud speakers and microphones are used instead of installing new magnets. 
AMR sensor systems should be designed carefully taking the invisible magnetic lines into account. For example, if unwanted magnets (in loud speakers and microphones, etc.) and materials such as steel sheets that cause bends in magnetic lines are located in vicinity of the sensor, it can cause problems such as false detections or preventing the sensor from switching on. It is recommended that sensor operation be checked using an actual product prior to starting mass production. 

We appreciate your cooperation with the FAQ improvement questionnaire.
Were these FAQs helpful?

We would like to hear your opinions and requests regarding these FAQs.
Opinions from customers will be used to improve the FAQs.
We will not respond to inquiries and requests received by this form.

Send inquiries from the following form, for problems that cannot be solved by FAQs and require a response from Murata.
Click here