Proxy sensor or proximity sensor which is also called industrial sensor. It is a non-contact sensor that detects the presence of an object, which is often called a “target” object, when the target enters the sensor area.
Types of proxy sensors
There are different types of proximity sensors. Each of them perceives goals in specific ways.
Two commonly used proximity sensors
Inductive proximity sensor
Capacitive proximity sensor
Depending on the type of proximity sensor, sound, light, infrared (IR) radiation, or electromagnetic fields may be used to detect the target. Proximity sensors are used in phones, recycling plants, self-driving cars, anti-aircraft systems, and assembly lines.
Proximity sensor application
Among the types of proxy sensors, we can mention the inductive proximity sensor, which can only detect metal targets. This is because the sensor uses an electromagnetic field.
When a metal target enters the electromagnetic field, the inductive properties of the metal cause the field characteristics to change, thereby alerting the proxy sensor to the presence of a metal target. Depending on how inductive the metal is, the target can be detected at a greater or lesser distance.
On the other hand, capacitive proximity sensors are not limited to metallic targets. These proximity sensors are capable of detecting anything that can carry an electrical charge.
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Application of capacitive sensors
These proxy sensors are usually used in liquid level detection. Possible purposes for capacitive sensors include:
Glass, plastic, water, wood, metals and countless other targets.
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Proximity sensor features
In order to learn more about the features of proximity sensors and to be able to make the best comparison between the types of proxy sensors, we will review some important and practical features together.
The ability to measure without the need for direct contact
One of the best features that can be mentioned for this proximity sensor is the possibility of detection without direct connection to objects.
Unaffected by surface conditions
To make it easier to understand, it should be said that these sensors are not affected by the colors of objects. The reason for this feature is the quick detection of physical changes in the body.
Wide application range
These sensors are easily adapted to humid conditions and temperature ranges. They can be used in various industrial climate industries.
Durability and long life
Due to the use of semiconductor outputs in their physics, the lifetime of these proximity sensors is longer than other sensors.
These sensors do not need any stimulus in their operating cycle for their operation.
Speed of action in responding
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