How do inductive proximity sensors work?
Inductive Proximity switch produces high frequency alternating field at the sensing face. When any metallic material enters in the sensing zone of the switch, the field gets disturbed. A Sensitive detector circuit senses this change which is further processed by amplifier circuit to produce output signal.There are three types of inductive proximity switches:
- Three And Four Wire DC Switches: Series IPS D3
- Inductive Proximity Switches: Two Wire DC: Namur Type: Intrinsically Safe Circuit: Series IPS D2 NC
- Inductive Proximity Switches: Two Wire AC : Series IPS A2
Inductive proximity sensors are used to detect the presence of metallic objects without actually contacting the object. Their high-speed switching and small size make them indispensable in automation applications. Inductive proximity sensors consist of an oscillator driven coil. The oscillator creates an electromagnetic field which appears at the active face of the sensor. If a metal target enters this area, the electromagnetic field is reduced and the sensor switch turns on or off. Some typical inductive sensor applications are: counting metallic objects, monitoring the position of elements in a machine, sensing the presence of metallic parts such as screws, and measuring the rotational speed of axial detecting cams.
