allen bradley photoelectric sensors
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    Allen Bradley Photoelectric Sensors

    What are Photoelectric Sensors?

    Photoelectric sensors determine the distance, absence, or presence of physical objects by emitting a field or beam of electromagnetic radiation. An object is detected by measuring alterations in the return signal, this is achieved as sensors have an Emitter for emitting light and a Receiver for receiving light. There are 3 main types of photoelectric sensors, through-beam, retro-reflective and diffuse, which vary slightly in the way they function.

    The basic function of each is to detect the presence or absence of objects or measure the distance to the object. You can learn more in our complete guide to photoelectric sensors.

    Types of Photoelectric Sensors:

    Through-beam Sensors

    Through Beam Sensors (aka thru-beam) rely on two separate housings, one for the transmitter and one for the receiver, with the transmitter providing a continuous beam of light to the receiver. Each time an object passes through the beam this interrupts the signal between the transmitter and receiver, which in turn causes the receiver to send an electrical signal to the output. Through-beam sensors are suited to long-distance sensing and can detect almost any object, irrespective of colour or angular motion.

    Retro-reflective Sensors

    Retro-reflective photoelectric sensors (retroreflective) have both the transmitter and receiver contained within the same housing but require a reflector opposite to the sensor. The reflector bounces the light beam back to the transmitter until an object breaks the beam. Objects which are highly reflective such as aluminium require sensors with polarising filters. The filter allows the sensor to acknowledge that the reflected light from reflecting materials is different from the reflector.

    Diffuse Sensors

    Diffuse sensors (proximity sensor) are easier to install as only one device must be mounted. This is because the transmitter and receiver are contained within one housing. Diffuse sensors use the reflection from the target object within a predetermined sensing range.

    The transmitter sends out a continuous beam of light, once this hits the target it is diffused in all directions, a part of this light is reflected and recognised by the receiver, the receiver then sends an electrical signal to the output. A special type of diffused mode is background suppression which enables the user to precisely control the sensing range.

    Applications of Photoelectric Sensors

    Photoelectric Sensors can be used in various settings, some of which include:

    • Food Industry
    • Pharmaceutical Industry
    • Packaging Plants
    • Automotive Industry
    • Doors & Gates

    Browse the broad range of Photoelectric Sensors RS Components have to offer and order today for next day delivery.

    61 Products showing for Allen Bradley Photoelectric Sensors

    Allen Bradley
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    Diffuse
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    PNP
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    Allen Bradley
    Block
    Retroreflective
    3 m
    PNP
    4 Pin Connector
    -
    -
    IO-LINK
    30V
    -
    4 Pin Micro Quick Disconnect
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Retroreflective
    3 m
    PNP
    4 Pin Connector
    Light / Dark switching
    -
    IO-LINK
    30V
    -
    4 Pin Pico Quick Disconnect
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Through Beam
    80 m
    NPN, PNP
    DC Micro M12 Connector
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
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    IO-Link
    -
    -
    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Diffuse
    500 mm
    PNP
    4 Pin Connector
    -
    -
    IO-LINK
    30V
    -
    4 Pin Micro Quick Disconnect
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Background Suppression
    10 → 400 mm
    NPN, PNP
    M12 Connector
    Light / Dark switching
    -
    -
    -
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    -
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    42AF
    Allen Bradley
    Block
    Retroreflective
    3 m
    PNP
    Pre-Wired Cable
    -
    -
    IO-LINK
    30V
    -
    Cable
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Background Reflection
    0 → 800 mm
    NPN, PNP
    Micro M12 Connector
    Light / Dark switching
    -
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    -
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    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
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    42AF
    Allen Bradley
    Block
    Through Beam
    0 → 13000 mm
    Emitter
    M8 4 Pin Connector
    -
    -
    IO-LINK
    30V
    -
    4 Pin Pico Quick Disconnect
    LED
    IP67, IP69K
    30 mA
    IO-Link
    500 μs
    -
    ABS
    +60°C
    -20°C
    Flange Mount
    42JT
    Allen Bradley
    Block
    Background Suppression
    10 → 600 mm
    NPN, PNP
    M12 Connector
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Diffuse
    500 mm
    PNP
    Pre-Wired Cable
    -
    -
    IO-LINK
    30V
    -
    Cable
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Diffuse
    500 mm
    PNP
    4 Pin Connector
    Light / Dark switching
    -
    IO-LINK
    30V
    -
    4 Pin Pico Quick Disconnect
    LED
    IP67
    100 mA
    IO-Link
    1 ms
    -
    Polymer
    +70°C
    -25°C
    Cable Mount, Threaded
    42EF
    Allen Bradley
    Block
    Through Beam
    80 m
    NPN, PNP
    4-Pin AC Micro, Pigtail
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
    -
    IO-Link
    -
    -
    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Background Suppression
    10 → 400 mm
    NPN, PNP
    M12 Connector
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Background Reflection
    80 m
    NPN, PNP
    DC Micro M12
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Diffuse
    3 → 800 mm
    PNP
    4 Pin Connector
    -
    -
    -
    30V
    -
    -
    Visible Red LED
    IP67
    -
    -
    1 ms
    -
    ABS
    +60°C
    -20°C
    -
    42JS
    Allen Bradley
    Block
    Through Beam
    0 → 18 m
    NPN/PNP
    M8 4 Pin Connector
    Light / Dark switching
    -
    IO-LINK
    30V
    -
    4 Pin Pico Quick Disconnect
    LED
    IP67, IP69K
    30 mA
    IO-Link
    500 μs
    -
    ABS
    +60°C
    -20°C
    Flange Mount
    42JT
    Allen Bradley
    Block
    Polarised Retro Reflection
    10 m
    EM Relay
    4-Pin AC Micro, Pigtail
    Dark Switching
    -
    -
    -
    -
    -
    -
    -
    -
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    -
    -
    -
    -
    42AF
    Allen Bradley
    Block
    Through Beam
    10 m
    Emitter
    4 Pin Connector
    -
    -
    -
    30V
    -
    -
    LED
    IP67
    -
    -
    1 ms
    -
    ABS
    +60°C
    -20°C
    -
    -
    Allen Bradley
    Block
    Background Suppression
    10 → 1200 mm
    NPN, PNP
    M12 Connector
    Light / Dark switching
    -
    -
    -
    -
    -
    -
    -
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    42AF
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