Permanent magnets are used in a variety of sensor applications; but what exactly is a sensor? A sensor measures input from its environment and converts it into data. That data might be collected and interpreted visually by a person (e.g., glass thermometer), or electronically by a machine. Sensors measure all sorts of things, including distance, weight, temperature, proximity, position, velocity, direction, etc.
Types of Electronic Sensors
Electronic sensors can be analog or digital. Analog sensors continuously take physical input and turn it into an analog signal, which has infinite possibilities. They measure things like temperature and pressure. Digital sensors measure a finite set of values, signaling fixed data. In just one car, there are dozens of sensors, and they continue to advance through the years. In addition to the ones that have been there since the early days of automobiles (e.g., low oil pressure), now there are ultrasonic sensors that measure the distance between your car and the car/object in front of or behind you. Home security systems use sensors, too. A contact sensor goes in a door or window frame alongside a disc magnet. When the circuit is closed, the alarm stays silent. When broken, it goes off. You might also see a Passive Infrared (PIR) system that measures changes in temperature.
Sensors Are the Future
Sensors are everywhere. As technology advances, electronic sensors — which often use permanent magnets — will expand into every industrial niche. They are and will continue to be used in transportation, medicine, nanotechnology, virtual and augmented reality, and even artificial intelligence (AI).Remember, we offer neodymium magnets that could be used in all sorts of sensor applications, as well as custom magnets. If you can’t find what you need on our website; don’t hesitate to reach out with questions.
