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Article: Plastic temperature measurement using infrared thermometers.
- Article from:
- British Plastics & Rubber
- Article date:
- June 1, 1998
CopyrightCOPYRIGHT 1998 Euro Publishing Consultancy. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Infrared thermometers calculate temperatures by detecting emitted energy from the plastic then processing the resulting electronic signal. A major factor in this process is emissivity (E), a measure of an object's effectiveness in radiating thermal energy. However, spurious energy can come from radiation transmitted from a hotter object behind it, or reflected from a hotter object in front of it.
The energy emitted by a plastic material is not evenly distributed. By observing the wavelengths at which peak energy is emitted, an instrument sensitive to that wavelength can be selected. This selection is most critical for thin-film plastics, since they tend to be ...
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