5.3 Dual Mode Considerations for Clear and Transparent Object
Detection
The Q4X is able to detect the very small changes caused by transparent and clear objects. A transparent object can be
detected either by a change in intensity, distance, or by a double-peak reflection.
The Q4X sensor can be taught non-ideal reference surfaces, such as surfaces outside of the sensor range or very dark
surfaces. Teaching non-ideal reference surfaces may enable applications other than transparent or clear object detection,
but best results for transparent or clear object detection require a stable reference surface.
The display shows the match percentage to the taught reference point. The user adjustable switch point defines the
sensitivity and the output switches when the match percentage to the reference point crosses the switch point. Your
specific application may require fine tuning of the switch point, but these values are the recommended starting values:
Switch point (%) Typical Applications
75 (default) Default, recommended for PET bottles and Trays
88 Recommended for thin films
50 Recommended for tinted brown, tinted green, or water-filled containers
10° or more
50 to 300 mm
Reference Surface
Separate as far as possible
Move as close
as possible
Tilt the beam
axis downward
It can also be
tilted
left or right
Figure 22. Mounting considerations
Q4X Stainless Steel Laser Sensor
www.bannerengineering.com - Tel: 763.544.3164 31
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