Retro reflective sensors detect small and large objects
February 2015
Sensors & Transducers
The new RK 46C.DXL VarOS retro reflective sensor from Leuze features a wide light band to detect both small and large objects, even with gaps.
“A handy ‘teach me’ function allows the sensor to be adapted between two object sizes greater than 8 mm at the touch of a button,” says Gerry Bryant, managing director, Countapulse Controls. These Leuze sensors are ideal for when the objects to be detected or the associated environmental conditions deviate from the norm.
The objects can be round, angular or both, with glossy surfaces, have transparent shrink wrapped film or even be totally black, with gaps or with high ambient light levels. “Depending on the application, Leuze can bring a range of technologies to bear to ensure reliable detection of such objects,” says Bryant.
The new retro reflective sensor is particularly effective in this regard as it responds to objects with the entire width of its light band, which gives it the capability to be able to handle interruptions. The wide light band allows for detection over a 45-60 mm wide area.
The sensitivity and/or resolution of the sensor can be adjusted easily by means of a button located on the rear housing. “The use of this sensor does away with the need for expensive light barriers or multiple individual sensors,” explains Bryant.
Features include:
• A homogenous light band.
• Teachable, preset sensitivity levels.
• Calibration to transparent, perforated or small objects.
• Precise alignment due to the special shape and form of the light band.
• Maximum system availability due to automatic readjustment of the performance reserve.
• Reliable detection even with depolarising media such as foil packaging.
• Light/dark switching by means of the ‘teach’ button.
For more information contact Gerry Bryant, Countapulse Controls, +27 (0)11 615 7556, bryant@countapulse.co.za, www.countapulse.co.za
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