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Proximity sensors

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Proximity sensors

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  1. Proximity sensors Optical – Through-beam Inductive Capacitive Optical – Retro-reflective Reed switch Symbols Optical - Diffuse Inductive magnetic Connection

  2. Optical sensors (Through-beam) Type : Through-beam

  3. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  4. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  5. Optical sensors (Through-beam) Type : Through-beam Target Transmitter Receiver

  6. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  7. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  8. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  9. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  10. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  11. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  12. Optical sensors (Through-beam) Type : Through-beam Transmitter Receiver

  13. Optical sensors (Through-beam) Target Type : Through-beam Transmitter Receiver Long sensing distance: up to 30 metres with some devices Will detect all but very transparent materials Must be accurately aligned

  14. Optical sensors (Retro-reflective)

  15. Optical sensors (Retro-reflective) T R Type : Retro reflective Transmitter /Receiver Reflector (prismatic)

  16. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  17. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  18. Optical sensors (Retro-reflective) Target Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  19. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  20. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  21. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  22. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  23. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  24. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic)

  25. Optical sensors (Retro-reflective) Type : Retro reflective T R Transmitter /Receiver Reflector (prismatic) Sensing distance : 1/2 to 1/3 of through-beam type Not suitable for reflective or transparent targets Target should be larger than the reflector

  26. Optical sensors (Diffuse) Type : Diffuse

  27. Optical sensors (Diffuse) T R Target Type : Diffuse Transmitter /Receiver

  28. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver

  29. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver

  30. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver

  31. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver

  32. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver

  33. Optical sensors (Diffuse) Type : Diffuse T R Transmitter /Receiver Sensing distance: much less than reflex type, actual distance depends on colour and reflective nature of the surface Larger targets result in longer sensing distances Not suitable for dirty environments

  34. Inductive sensors

  35. Inductive sensors High frequency magnetic field(300 to 800 kHz) Active surface Resonant circuit coil LED indicator Connection cable

  36. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  37. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  38. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  39. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  40. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  41. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  42. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  43. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  44. Inductive sensors Target Sensor Oscillation Amplitude Sensor output signal ON OFF

  45. Inductive sensors • Will detect any conductive material • Quoted distances are for mild steel • Sensor performance can be affected by: • Temperature • Target material • Target dimensions

  46. Reed switch

  47. Reed switch Glass Tube filled with nitrogen Reed contacts LED indicator

  48. Reed switch

  49. Reed switch

  50. Reed switch