17. Transmitter / Receiver Optical Sensors Type : Diffuse T R
18. Transmitter / Receiver Optical Sensors Type : Diffuse 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 T R
24. Oscillation Amplitude Sensor output signal ON OFF Sensor Will detect any conductive material Quoted distances are for mild steel Sensor performance can be affected by:- Temperature, Target material, and Target dimensions. Target Inductive Sensor
28. Interference from other magnetic fields must be avoided. If positioned in mid stroke, switching point will vary depending on direction of appoach. Maximum current must be limited to avoid burning of the reed contacts. Reed Switch
32. Inductive principle of operation - but only reacts to magnetic fields Interference from other magnetic fields must be avoided. Solid state device - higher switching frequency - 1kHz Inductive Magnetic Sensor
34. Electronic Sensors : Capacitive Proximity Sensor G 1. Oscillator 2. Demodulator 3. Triggering Stage 4. Switching status LED indicator 5. Output Stage with protective Circuit 6. External Voltage 7. Internal Stabilized Voltage 8. Active Switching Zone (Condenser) 9. Switching Output 1 2 3 4 5 9 7 6 8
35. Connection cable Adjusting screw LED indicator Active surface Active electrode Earth electrode Electrostatic field Sensor is looking for a change in capacitance in the active field Capacitive Sensor
37. Capacitive Sensor Detects any material denser than air. (as long as there is enough of it) Can be adjusted for sensitivity Can be affected by dusty environments
40. + 18 to 30 Volts DC. 0 V Output Inductive Capacitive Optical Magnetic Ultrasonic Normally open Normally closed
41.
42. Oscillation Amplitude Sensor output signal ON OFF Sensor Will detect any conductive material Quoted distances are for mild steel Sensor performance can be affected by:- Temperature, Target material, and Target dimensions. Target Inductive Sensor
43. Capacitive Sensor Detects any material denser than air. (as long as there is enough of it) Can be adjusted for sensitivity Can be affected by dusty environments
44. Target Optical Sensors Type : Through-beam Long sensing distance : up to 30 metres with some devices Will detect all but very transparent materials Must be accurately aligned Transmitter Receiver
45. Transmitter / Receiver Optical Sensors Type : Reflex 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 T R
46. Transmitter / Receiver Optical Sensors Type : Diffuse 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 T R
47. Interference from other magnetic fields must be avoided. If positioned in mid stroke, switching point will vary depending on direction of appoach. Maximum current must be limited to avoid burning of the reed contacts. Reed Switch
48. Inductive principle of operation - but only reacts to magnetic fields Interference from other magnetic fields must be avoided. Solid state device - higher switching frequency - 1kHz Inductive Magnetic Sensor