【ndir sensor,semiconductor gas sensors,automotive test instruments,infrared carbon dioxide sensor,ndir gas sensor】What is the difference between photoelectric sensors and optical sensors? | www.isweek.com

A photoelectric sensor, or photo eye, is a device used to detect the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are used extensively in industrial manufacturing. There  are three different functional types: opposed (through beam),  retro-reflective, and proximity-sensing (diffused).

Electro-optical sensors are electronic  detectors that convert light, or a change in light, into an electronic  signal. They are used in many industrial and consumer applications, for  example: Lamps that turn on automatically in response to darkness.  Position sensors that activate when an object interrupts a light beam.

An optical sensor is a sensor based on an emitter, usually a ir led , and an optical captor. They can be apart components or in the same piece. Forma example used yo read the speed of a wheel, you use an optical sensor.

A photoelectric sensor is a component itself , a light variable resistor.

However searching un google can give you ambiguous results.

They are the same. In some applications like counting and limit triggering, a definite (strong) source of light may be used to obviate spurious triggering by varying ambient light. Otherwise, all of them differentiate between presence and absence of light and set the output appropriately, i.e. the sensor converts light variation into a binary decision. In this (digital) mode, they are called light, photoelectric or optical switches.

 

In analog mode, a photoelectric or optical sensor measures the incident light intensity and reports this as a corresponding electrical signal.

 

A photoelectric sensor, or photo eye, is a device used to detect the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are used extensively in industrial manufacturing.Photoelectric sensors use a beam of light to detect the presence or absence of an object. This technology is used to identify size and contrast of an object.

 

An optical sensor is generally part of a larger system that integrates a source of light, a measuring device and the optical sensor. This is often connected to an electrical trigger. The trigger reacts to a change in the signal within the light sensor.One of the features of an optical sensor is its ability to measure the changes from one or more light beams. This change is most often based around alterations to the intensity of the light. Optical sensors can work either on the single point method or through a distribution of points. With the single point method, a sole phase change is needed to activate the sensor. In terms of the distribution concept, the sensor is reactive along a long series of sensors or single fiber-optic array.

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