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.


...
Voir plus Voir moins

Filtres

Afficher 1 - 20 des 311 produits
Nombre de résultats par page
Description Prix Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface Response Time
N° de stock RS 816-0374
Référence fabricantE3FCRN21
MarqueOmron
77,75 €
Each
Unité
Barrel Retroreflective 0.1 4 m NPN M12 Connector - 30V - Cable LED IP67, IP68, IP69K 25 mA - 0.5 ms
N° de stock RS 807-4551
Référence fabricantEE-SX1103
MarqueOmron
1,67 €
Each
Unité
Block Diffuse - - - 1.6V - - PCB Pin - - 50 mA - 10 μs
N° de stock RS 816-0337
Référence fabricantE3FCDP23
MarqueOmron
81,05 €
Each
Unité
Barrel Diffuse 1 m PNP M12 Connector - 30V - Cable LED IP67, IP68, IP69K 25 mA - 0.5 ms
N° de stock RS 256-449
Référence fabricantE3JMDS70M4G
MarqueOmron
116,00 €
Each
Unité
Block Diffuse 700 mm Relay 5-Terminal Screw 250V 5V - - Infrared IP66 3 A - 30 ms
N° de stock RS 284-3304
Référence fabricantE3SCL2
MarqueOmron
222,00 €
Each
Unité
Block Background Suppression 5 500 mm NPN 3-Wire Cable 2m - 30V - - Infrared IP67 100 mA - 2 ms
N° de stock RS 807-4560
Référence fabricantEE-SH3
MarqueOmron
3,88 €
Each
Unité
Block Through Beam (Fork) - Phototransistor - 1.5V - - PCB Pin - - 50 mA - 4 μs
N° de stock RS 818-1716
Référence fabricantEE-SX675
MarqueOmron
16,37 €
Each
Unité
Fork Through Beam (Fork) Maximum of 5 mm NPN 4-Pin Connector - 24V - Connector Infrared IP50 12 mA - -
N° de stock RS 768-5926
Référence fabricantE3FADP22
MarqueOmron
60,80 €
Each
Unité
Barrel Diffuse 300 mm PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
N° de stock RS 372-8177
Référence fabricantE3ZR612M
MarqueOmron
98,50 €
Each
Unité
Block Retroreflective 100 mm → 4 m NPN 3-Wire Cable 2m - 26.4V - - LED IP69K 100 mA - 1 ms
N° de stock RS 818-1611
Référence fabricantEE-SX674
MarqueOmron
16,04 €
Each
Unité
Fork Through Beam (Fork) Maximum of 5 mm NPN 4-Pin Connector - 24V - Connector Infrared IP50 12 mA - -
N° de stock RS 768-5897
Référence fabricantE3FARP122M
MarqueOmron
63,10 €
Each
Unité
Barrel Retroreflective 0 500 mm PNP Pre-Wired Cable - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
N° de stock RS 617-0666
Référence fabricantE3ZLR86
MarqueOmron
154,30 €
Each
Unité
Block Retroreflective 0.2 7 m PNP 4-Pin M8 Connector - 26.4V - - LED IP67 100 mA - 1 ms
N° de stock RS 219-2274
Référence fabricantEE-SX670
MarqueOmron
14,69 €
Each
Unité
Fork Through Beam (Fork) 5 mm NPN Connector - 24V - - Infrared IP50 100 mA - -
N° de stock RS 745-2174
Référence fabricantE3Z-LS61 2M
MarqueOmron
133,80 €
Each
Unité
Block Background Suppression 20 200 mm NPN 4-Wire Cable 2m - 24V - - LED IP67 100 mA - 1 ms
N° de stock RS 768-5881
Référence fabricantE3FARP21
MarqueOmron
60,80 €
Each
Unité
Barrel Retroreflective 0.1 4 m PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
N° de stock RS 617-0694
Référence fabricantE3Z-LL86
MarqueOmron
200,90 €
Each
Unité
Block Background Suppression 20 300 mm PNP 4-Pin M8 Connector - 26.4V - - LED IP67 100 mA - 1 ms
N° de stock RS 768-5917
Référence fabricantE3FADP21
MarqueOmron
60,80 €
Each
Unité
Barrel Diffuse 100 mm PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
N° de stock RS 778-8713
Référence fabricantE3JK-RR12 2M
MarqueOmron
77,50 €
Each
Unité
Block Retroreflective 6 m, 100 mm Relay 5-Wire Cable 2m 240V 240V - Wire Lead LED IP64 - - 20 ms
N° de stock RS 198-0575
Référence fabricantE3SGS3B4
MarqueOmron
221,83 €
Each
Unité
Fork Through Beam (Fork) 30 mm PNP 3-Wire Cable 2m - 24V - - Infrared IP67 100 mA - 1 ms
N° de stock RS 775-4228
Référence fabricantE3FBRP21
MarqueOmron
66,45 €
Each
Unité
Barrel Retroreflective 0.1 4 m PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms