Proximity Switches

Proximity switches can be divided in inductive proximity switches and capacitive proximity switches. Inductive sensors detect metal objects, where capacitive sensors are used for detection of non-metal objects like liquid levels.
Inductive

Inductive

Inductive sensors only switch on metals. They have the advantage not to be sensitive to other materials in the environment, such as wood, plastic or pollution and are, unlike mechanical switches, free from wear.
Capacitive

Capacitive

Capacitive sensors are suitable for level detection of liquids and solid materials such as wood or granulates. Sensitivity adjustment via a potentiometer.