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Sensor is a device which detects or measures a physical property and records, indicates, or responds to it.
There are different kinds of sensors as below:

Photoelectric Sensors

Photoelectric Sensors detect objects, changes in surface conditions, and other items through a variety of optical properties.
A Photoelectric Sensor consists primarily of an Emitter for emitting light and a Receiver for receiving light. When emitted light is interrupted or reflected by the sensing object, it changes the amount of light that arrives at the Receiver. The Receiver detects this change and converts it to an electrical output. The light source for the majority of Photoelectric Sensors is infrared or visible light (generally red, or green/blue for identifying colors).

Proximity Sensor

Proximity Sensor includes all sensors that perform non-contact detection in comparison to sensors, such as limit switches, that detect objects by physically contacting them. Proximity Sensors convert information on the movement or presence of an object into an electrical signal. There are three types of detection systems that do this conversion: systems that use the eddy currents that are generated in metallic sensing objects by electromagnetic induction, systems that detect changes in electrical capacity when approaching the sensing object, and systems that use magnets and reed switches.

Fiber Sensor

A Fiber Sensor is a type of Photoelectric Sensor that enables detection of objects in narrow locations by transmitting light from a Fiber Amplifier Unit with a Fiber Unit.

The Features of these kind of sensors are as below:

  1. Detection in Narrow Locations

The small sensing section and flexible Fiber Unit cable enable a Fiber Sensor to detect objects in narrow locations.

  1. Superior Environmental Resistance

The sensing section of a Fiber Unit has no electric circuits.
This makes it highly reliable even under severe environmental conditions, such as temperature, vibration, shock, water, and electrical noise conditions.

  1. Easy Installation

The Fiber Unit can be installed close to the sensing object.
This allows you to freely select where to install the Fiber Amplifier Unit.

  1. Virtually No Sensing Object Restrictions

These Sensors operate on the principle that an object interrupts or reflects light, so they are not limited like Proximity Sensors to detecting metal objects. This means they can be used to detect virtually any object, including glass, plastic, wood, and liquid.

  1. Fast Response Time

The response time is extremely fast because light travels at high speed and the Sensor performs no mechanical operations because all circuits are comprised of electronic components.

  1. Non-contact Sensing

There is little chance of damaging sensing objects or Sensors because objects can be detected without physical contact.
This ensures years of Sensor service.

  1. Color Identification

The rate at which an object reflects or absorbs light depends on both the wavelength of the emitted light and the color of the object.
This property can be used to detect colors.

  1. Easy Adjustment

Positioning the beam on an object is simple with models that emit visible light because the beam is visible.


Displacement Sensor

A Displacement Sensor is a device that measures the distance between the sensor and an object by detecting the amount of displacement through a variety of elements and converting it into a distance. Depending on what element is used, there are several types of sensors, such as optical displacement sensors, linear proximity sensors, and ultrasonic displacement sensors.

The Features of these kind of sensors are as below:

  1. A physical quantity of an object can be measured.

A Displacement Sensor measures and detects changes (displacement) in a physical quantity.
The Sensor can measure the height, width, and thickness of an object by determining the amount of displacement of that object.
A Measurement Sensor measures the position and dimensions of an object.

  1. Physical quantity output is also possible in addition to ON/OFF signal output.

Analog output of physical quantities (current output or voltage output) can also be performed (excluding some models).
Some models also support digital (serial) communications.



Ultrasonic Sensor

The Reflective Ultrasonic Sensor sends ultrasonic waves from an emitter toward a sensing object, then receives the reflected waves with a detector.

The Sensor uses the resulting information to determine the presence of an object, or to measure the distance to the object.
This type of Sensor determines the distance from the Sensor to an object based on the time required from when the ultrasonic waves are sent until they are received using the speed of sound.
There are also Through-beam Sensors that detect the presence of an object by detecting the attenuation or interrupted condition of ultrasonic waves caused by an object passing between the emitter and detector.


Vision Sensor

By applying image processing to images captured by a camera, the vision sensor calculates the characteristics of an object, such as its area, center of gravity, length, or position, and outputs the data or judgment results.