Photoelectric Sensors

Photoelectric sensors detect and measure physical objects or quantities by emitting a field or beam of electromagnetic radiation, an object is detected by measuring alterations in the return signal. There are 3 main types of photoelectric sensors which provide reliable detection, these are through-beam, retro-reflective and diffuse. The basic function of each is to detect the presence or absence of objects or measure the distance to the object.


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 are capable of detecting 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 has to 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 back 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. A diffuse mode sensor with background suppression is less sensitive to the target colour. They can also use a visible red light or infrared light sources.


...
Lees meer Lees minder

Filters

1841 - 1860 van 1888 producten worden weergegeven
Resultaten per pagina
Omschrijving Prijs Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Communication Protocol Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface
RS-stocknr. 2509487734
FabrikantnummerEX-32A
FabrikantPanasonic
130,06 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2508470025
FabrikantnummerMPB20
FabrikantPepperl + Fuchs
45,68 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667429
FabrikantnummerVS2AN5CV30
93,96 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2508425309
FabrikantnummerSMA912LVQD
184,26 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667643
FabrikantnummerEM-T-7A
145,90 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509665489
FabrikantnummerSM2A312LPQD
139,70 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509665697
FabrikantnummerQ12AB6FF50Q5
114,98 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509666791
FabrikantnummerSMU315D
140,95 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509666498
FabrikantnummerT18SP6LQ
94,26 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509665811
FabrikantnummerLR400
87,77 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509202968
FabrikantnummerMPG6HD
FabrikantPepperl + Fuchs
171,84 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509664874
FabrikantnummerRLM5
88,76 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509665164
FabrikantnummerOPBA2QD
106,32 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667996
FabrikantnummerRPBT
88,76 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2508470110
FabrikantnummerMPS32HD
FabrikantPepperl + Fuchs
114,56 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667047
FabrikantnummerS18SN6DQ
69,54 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667233
FabrikantnummerQ453E
101,99 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509666921
FabrikantnummerS18SN6LP
92,74 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509665287
FabrikantnummerQ85VR3DL
152,34 €
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 2509667924
FabrikantnummerLM5
99,35 €
Each
Aantal stuks
- - - - - - - - - - - - - -
Related Products
Two-part photo sensor rated to IP66 with LED ...
Description:
Two-part photo sensor rated to IP66 with LED status indication. Upper section contains optics and electronics, base section has terminal connections. The base section can remain in place when changing the sensor. Relay output, light ON/dark ON selectable20mm cable gland ...
Baumer OR18.ZL diffuse photoelectric sensors offer a high ...
Description:
Baumer OR18.ZL diffuse photoelectric sensors offer a high sensing distance laser light source in a robust compact design. The robust and resistant housing provides effective and reliable use in industrial environments. OR18 sensors combine functionality with simple and reliable handling ...
The Carlo Gavazzi PA18CLD01TC diffuse-reflective sensor is useful ...
Description:
The Carlo Gavazzi PA18CLD01TC diffuse-reflective sensor is useful for simple applications where a basic sensor provides adequate sensing performance. The sensors are simple to use and no adjustment are necessary. Modulated, infrared lightMake or break switching function, LED indicationHigh immunity ...
Plug-in (M12) connectorNickel plated brass housing sealed to ...
Description:
Plug-in (M12) connectorNickel plated brass housing sealed to IP67PNP NO/NC selectable output via a control wireLED output status indicatorAdjustable sensing distance via a teach-in button and remotely by a control wire (diffuse type only)Reverse polarity and short-circuit protectionLength 66mm (M12 ...