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Photoelectric sensors 
Presented by: 
Darshil Shah 
IU1241090051
Content 
 What is photoelectric sensor? 
 Sensing mode 
 Working, Advantages & Disadvantages of sensing 
modes 
 Appli...
What is photoelectric sensor? 
• A photoelectric sensor, or photo eye, is a device used to 
detect the distance, absence, ...
Sensing modes 
 Through beam 
 Retro-reflective 
 Diffused beam
Through-beam 
 Working: 
The transmitter and receiver of the thru beam sensor are 
housed in different cases that are sep...
 Advantages : 
1. Most accurate. 
2. Longest sensing range. 
3. Very reliable. 
 Disadvantages: 
1. Must install at two ...
Retro-Reflective 
 Working: 
The retro-reflective sensor contains the emitter and receiver 
in a single housing. The ligh...
 Advantages: 
1. Cost less 
2. Sensing range better and Very reliable 
 Disadvantages: 
1. Must install at two points on...
Diffused-beam 
 Working: 
The structure of the diffuse mode sensor is based on the 
same principle as a retro-reflective ...
 Advantages: 
1. Only install at one point 
2. Cost less than through-beam or reflective 
 Disadvantages: 
1. Less accur...
Applications 
1. Piled up ice cream cups 
Through beam laser sensor detects piled up ice cream cups. 
Small spot size of l...
2. Through beam laser sensors we use water detection detects 
whether transparent bottle is filled with clear liquid or no...
3. Defects seal on instillation bags. 
When it's sealed, diffuse sensor detects upper edge of the bag 
and finds its disto...
4. If flowing can is fallen down, some sensor does not detect 
anything and find trouble. 
As Reflective laser sensor, sta...
References 
• www.sick.com 
• www.balluff.com 
• www.eaton.in 
• www.bannerengineering.com 
• www.automation.com 
• www.ro...
Photoelectric sensors
Photoelectric sensors
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Photoelectric sensors

Photoelectric sensor
introduction
types
advantages-disadvantages
application

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Photoelectric sensors

  1. 1. Photoelectric sensors Presented by: Darshil Shah IU1241090051
  2. 2. Content  What is photoelectric sensor?  Sensing mode  Working, Advantages & Disadvantages of sensing modes  Application
  3. 3. What is photoelectric sensor? • 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 • The output signal can be analog or digital and is often internally modified with timing logic, scaling, or other signal processing prior to output
  4. 4. Sensing modes  Through beam  Retro-reflective  Diffused beam
  5. 5. Through-beam  Working: The transmitter and receiver of the thru beam sensor are housed in different cases that are separated from each other. The Emitter (E) transmits directly to the receiver (R). If an object (O) interrupts the light beam, the receiver voltage drops and the switching function is initiated E R O
  6. 6.  Advantages : 1. Most accurate. 2. Longest sensing range. 3. Very reliable.  Disadvantages: 1. Must install at two points on system: emitter and receiver. 2. Costly - must purchase both emitter and receiver.
  7. 7. Retro-Reflective  Working: The retro-reflective sensor contains the emitter and receiver in a single housing. The light from the transmitter is beamed back from a reflector to the receiver. If the beam of light is interrupted, the switching function is initiated
  8. 8.  Advantages: 1. Cost less 2. Sensing range better and Very reliable  Disadvantages: 1. Must install at two points on system: sensor and reflector 2. Slightly more costly than diffuse 3. Sensing range less than through-beam
  9. 9. Diffused-beam  Working: The structure of the diffuse mode sensor is based on the same principle as a retro-reflective sensor. It does not have a reflector, however. Instead, the light reflected from the recorded object is evaluated by the receiver.
  10. 10.  Advantages: 1. Only install at one point 2. Cost less than through-beam or reflective  Disadvantages: 1. Less accurate than through- beam or reflective 2. More setup time involved
  11. 11. Applications 1. Piled up ice cream cups Through beam laser sensor detects piled up ice cream cups. Small spot size of laser finds slight changes in tallness.
  12. 12. 2. Through beam laser sensors we use water detection detects whether transparent bottle is filled with clear liquid or not
  13. 13. 3. Defects seal on instillation bags. When it's sealed, diffuse sensor detects upper edge of the bag and finds its distortion
  14. 14. 4. If flowing can is fallen down, some sensor does not detect anything and find trouble. As Reflective laser sensor, stable detection without influences from designed print and glaze can be available.
  15. 15. References • www.sick.com • www.balluff.com • www.eaton.in • www.bannerengineering.com • www.automation.com • www.rockwellautomation.com • www.ia.omron.com

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