A proximity sensor is a device that can detect objects which are at a distance without physically contacting them. You can find many types of sensors in the market today. The way that these sensors detect objects is by emitting a beam or using an electromagnetic field from the sensor which detects the changes in the electromagnetic field.
Many different kinds of proximity sensors are being used today including the inductive, photoelectric, capacitive, and ultrasonic. If objects are nearby, the long-range sensors are used to detect them. These sensors are used mainly in navigation systems and ships so that they can detect obstructions in their paths. The short-range sensors are used in many different security systems and electronic equipment. These short-range sensors give warning when objects are nearby.
Navigation vessels and ships use proximity sensors which utilize sonar systems or sound navigation so that they can determine the proximity of objects underwater. Electromagentic radiation can also be used to determine the proximity of objects.
The movement of ships and aircrafts were tracked using these sensors. These sensors were also used for automobiles and other appliances.
Automobiles that use proximity sensors are able to detect object or vehicles that are nearby. In the rear of the automobile, the proximity sensor is situated so that drivers of approaching cars or other vehicles may be alerted.
These proximity sensors help ensure that windows and doors are shut so they are used in certain home appliances. In order to determine the proximity of the screen and the face of the user, modern equipment like phones and computer screens have proximity sensors.
The use of proximity sensors is also seen in consumer electronics and automated industry. To detect materials, it is used in the arms of robots, automatic doors, iPhones, and more.
You can use proximity sensors in roller coasters, anti-aircraft warfare, conveyor systems, and many other applications. To warn against ground proximity, proximity sensors are used in the aviation field. Proximity sensors are also used in large steam turbines, compressors, and motors.
In order to detect metallic objects inductive sensors are used. The electrical principle of inductance is how an inductive proximity sensor operates. The accuracy of inductive proximity sensors is one of its advantages compared to other technologies. The switching rate of the inductive proximity sensor is high and it can work even in harsh environmental conditions.
The capacitive and inductive sensors use similar principles. The difference lies in the capacitive sensors product electrostatic fields while inductive sensors produce electromagnetic fields. One of the benefits of capacitive sensors is its ability to detect both metallic and non-metallic objects. Capacitiev sensors also have high speed and good stability. Capacitive sensors are good in terms of power usage and are low in cost.
You can buy different types of proximity sensors from online stores are reasonable prices.