Proximity Sensors

What is a Proximity Sensor?

"Proximity sensor" includes all sensors that perform non-contact detections. They work by converting information on the movement or presence of an object into an electrical signal.

Features and Advantages of a Proximity Sensor

• Electrically-based object detection
• Longer service life
• Suitable for use in locations where water or oil is used
• Higher response speed
• Can be used over a wide range of temperatures
• Unaffected by an object's surface colours or other surface visual conditions

Types of Proximity Sensors

Inductive Proximity Sensor

Inductive sensors work by detecting eddy currents, causing the loss of magnetic properties, generated by external magnetic fields on conductive surfaces.

Applications:

• Assembly lines
• Detection of metal parts in harsh environments
• High-speed moving parts
• Security functions
• Product counting

Magnetic Proximity Sensor

Magnetic sensors utilize magnetic forces for activation. The reed end of the switch is operated by a magnet; when it is turned ON, the sensor is also turned ON. They are commonly used in object detection, such as security checkouts.

Capacitive Proximity Sensor

Capacitive sensors work by detecting changes in capacitance (the ratio of the amount of electric charge stored on a conductor to a difference in electric potential) between the sensor and an object.

Applications:

• Moisture control
• Non-destructive sensing
• Production automation
• Fluid level/composition/pressure detection

What is the Symbol for a Proximity Sensor?

The electrical symbol for a proximity sensor is a graphical representation of the device, providing engineers a quick and clear reference for its position in the circuit without the need for a physical examination.

The symbol is generally depicted as a square with symbols representing the sensor’s components inside.

Proximity Sensor Symbols Made Easy With Capital X Panel Designer!

Adding a symbol for proximity sensors to your schematic drawing is made faster and easier with Capital X Panel Designer! This electrical CAD software features an extensive library of pre-made symbols that can be easily dragged and dropped onto your drawing. You can even copy and paste any symbols you need multiples of, greatly improving your production speed.

Learn more about how to create custom electrical symbols.