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Detect liquids in clear, frosted, or colored containers

By Design World Staff | September 21, 2008

According to Banner Engineering, detecting clear water in a clear bottle is no longer a challenge. That‚’s because its WORLD-BEAM‚® QS30H2O Opposed Mode Water Sensors detect water-based liquids in clear, frosted, colored, or even partially opaque bottles or containers.

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The sensors use a specially designed beam set at a wavelength of 1450 nm. Water absorbs about 1000 times more energy at a 1450 nm wavelength than at visible wavelengths. When the bottle is clear, the water‚’s energy absorption creates high contrast between the water and the bottle. For example, a clear PET plastic bottle may attenuate about 5% of the light emitted, and the water attenuates about 95% of the light energy, so discriminating between an empty or full bottle is simple. The Opposed Mode Water Sensors also have high excess gain to ‚“burn through‚” many partially opaque glass and plastic containers, but not through the liquid contents.

The sensors consist of an emitter and a choice of either a low-power receiver for detecting water in clear bottles, or a high-power receiver, designed to effectively receive the emitted beam through partially opaque containers. The 13 mm diameter beam can be shaped using one of the three apertures that come standard with each emitter/receiver pair. The aperture reduces excess gain and narrows the sensing beam for accurate detection of water in vials, test tubes, or other small vessels and containers.

Applications include fill level inspection in bottling applications, test tube liquid detection, as well as food packaging inspection and verification.

Banner Engineering
www.bannerengineering.com


.:Design World:.

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Filed Under: Packaging, SENSORS, TEST & MEASUREMENT

 

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