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Showing Results For: Photoelectric Sensors

Photoelectric Sensors

A photoelectric sensors is a sensing component that uses light to detect an object in its field of view. Photoelectric sensors are used to perceive and measure physical objects or aggregates by discharging a beam or field of electromagnetic radiation as well, as an object is detected by measuring modifications in the return signal. The transmitter component of the sensor projects a light beam into the area it is observing, using both visible and laser light. This beam is frequently pointed at a target or reflector module, relying on the model.

Types of Photoelectric Sensors: 

The photoelectric sensors are divided into three main types that supply reliable detection: through-beam, retro-reflective, and diffuse. All types of photoelectric sensors have the same primary function: to measure the distance to an object or the presence or absence of the object.        

  • Through-beam Sensors:

Through-beam sensors depend on two distinguished housings, one for the transmitter and the other for the receiver, where the transmitter provides a constant beam of light to the recipient. Whenever an object passes through the beam, this passing interrupts the signal between the transmitter and the receiver; these interruptions cause the receiver to send an electrical signal to the output. These sensors are suitable for long-distance sensing and can detect almost any object, ignoring the colour or angular motion.

  • Retro-reflective Sensors:

Retro-reflective photoelectric sensors own both the transmitter and receiver within the same housing; apart from that, it requires a reflector across the sensor. The reflector rebounds the light beam and returns it to the transmitter till an object smashes the beam. Highly reflective objects like aluminium require sensors with polarising filters. The filter lets the sensor accept that the reflected light from reflecting materials is distinct from the reflector.

  • Diffuse Sensors:

Diffuse sensors, also known as proximity sensors, are straightforward to install. At the same time, only one device must be mounted because the transmitter and receiver of the diffuse sensor are contained within one housing. These sensors use the reflection from the target object inside a prearranged sensing range. The transmitter sends out a continuous beam of light and diffuses it in all directions; once this hits the target, a piece of this light is reflected and acknowledged by the receiver, and then the receiver sends an electrical signal to the output. A particular type of diffused approach is background suppression, which authorises the user to precisely control the sensing range.

Applications:

  • Mostly photoelectric sensor applications are found in industrial or manufacturing environments.
  • Photoelectric sensors are used to check objects on conveyors. 
  • Additionally, optical sensing modules are very productive at counting or measuring the overall volume of many tiny items and objects.
  • Photoelectric sensors are often used in:
  • Increased high-tech logistics,
  • Warehousing and materials handling environments.
  • Automated warehouses use robotic trucks or pick-and-place machinery, for both accuracy and safety reasons.
  • The intimate use of photoelectric sensor technology is the operation of automatic doors. 
  • Mostly found at the doorways to buildings or secure access areas, they are also found in certain types of public transport vehicles to allow automatic entry and exit. 
  • Same sensors are often used to detect uncertified entry through doors or windows that are supposed to remain closed.
  • Additionally, it can also be used for color detection and for accurate distance measurement via triangulation.

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CX-481-P-J, Panasonic

CX-481-P-J, Panasonic

CX400 — Retroreflective The CX-400 series of photoelectric sensors is a wide-ranging lineup of 116 different models. Whatever your application entails, Panasonic has covered it with this series. Built to IP-67 standards, the CX-400 series is designed for the most demanding environments. Retroreflective type with polarizing filters Long sensing range of 5m Strong against extraneous light and noise Two sensors can be mounted close together
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E3Z-LS Distance Settable Sensors The E3Z-LS range of photoelectric sensors are compact in design with a built in amplifier. E3Z-LS distance settable sensors are unaffected by colour or background whilst able to detect minute steps. Simple positioning settings using a clear LED spot Distance setting by 5 turn endless adjuster Load power supply voltage: 26.4 Vdc max Load current: 100 mA max Open collector output Reversed power supply polarity protection, Output short-circuit protection, Mutual interference prevention IP67 rated
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EX-23-PN, Panasonic

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MLV41-8-H-350-IR/59/95/136, Pepperl + Fuchs

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Pepperl and Fuchs – Dura-Vue Photoelectric Sensors The Pepperl and Fuchs Dura-Vue photoelectric sensor series has been professionally designed to include four sensing modes as well as contrast and colour sensing in a rugged, metal framed housing. The series also features a unique 4 in 1 output which helps reduce inventory requirements. Dura-Vue photoelectric sensors Input Voltage: 10-30 VDC 4 in 1 out reduces output requirements
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