A capacitive sensor measures changes in capacitance as objects approach or make contact. Their operation is based on the fact that the electric field changes when an object containing electrical charges is near. This change is detected and measured by the sensor.
They are used in many different applications, such as touch screens, proximity sensors, liquid detection, and distance measurements. For example, smartphones and tablet devices use capacitive touchscreens that detect the touch of a finger or stylus. These sensors offer a sensitive and precise interface.
Additionally, capacitive sensors can be used for human body detection, such as fingerprint recognition and gesture detection. They are also effective for liquid detection, such as moisture detection or measuring liquid levels in industrial applications.
Capacitive sensors offer many advantages, such as sensitivity, accuracy, and reliability. They are also durable and require little maintenance. However, their operating principle requires the use of conductive materials, which may limit their use in certain environments.
