• MRK Engineers

IR Photo-Electric Detectors / Sensors

MRK Engineers offers IR Photo-Electric Detectors / Sensors.

Operating Principal:
A photo-electric detector system comprises basically a light beam transmitter working in conjunction with a receiver, sensitive to the transmitted light. The object is detected by its effect of breaking or changing the intensity of the light beam. The light source used in the system in generated by a light-emitting diode (LED) in the transmitter and is modulated at a particular frequency and ensure an extremely long service life. There are three main types are available.

• THROUGH BEAM: Transmitters and receiver are in separate enclosures.
• Features: This system is the most suitable for the detection of opaque or reflective objects
• Use within a dirty or polluted environment (dust rain mist etc.)
• Application requiring long-range detection
• Detection where accuracy is important and where small object are being detected and for counting system precision within these application can be improved with the uses of masks
• Accurate setting-up alignment is essential
• Cannot be used to detect transparent objects
• Only transmitters and receivers from the same model ranges should be used together
• REFLECTIVE : Transmitters and receiver are contained within the same enclosures.
• FEATURES: This system is the most suitable for
• Application where detected is only possible from one side
• Application where rapid, simple installation is required the reflect may be mounted at an angle of up to +/- 15 deg from the line perpendicular TO THE LIGHT BEAM
• A relatively clean environment and is the most common system to be used on packing conveyors etc. Contraints: this system is not recommended where
• Smooth or reflective object are to be detected
• A dirty or polluted environment exists
• For the detection of very small objects
• DIFFUSE TYPE: Transmitters and receiver are contained within the same enclosure.
• FEATURES: This system is not most suitable for
• The detection of transparent or translucent object (such as empty bottles on a conveyor)
• Short-range applications
• Usable range depends largely on the colour and the reflective nature of object to be detected
• An area behind the target should be clear of very reflective surfaces
• Their use is not recommended for dirty environment or where very small object need to be detected