What is infrared?
Every form of matter with a temperature above absolute zero (-273.15°C / -459.8°F) emits infrared radiation according to its temperature. This is called characteristic radiation.
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Discovery of infrared radiation
The discovery of infrared radiation by the physicist Wilhelm Herschel at the beginning of the 19th Century opened new possibilities for measuring temperature – without contact and thus without affecting the object being measured and the measurement device itself.
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How do ratio pyrometers work?
A pyrometer is a type of thermal sensor used for measuring high temperatures of a surface, often in large furnaces or kilns. These devices measure the temperature of an object or surface from the thermal radiation emitted, also known as radiometry.
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Accurate Noncontact Infrared Temperature Measurement
To assure accurate noncontact infrared temperature measurement keep in mind the following: Distance to Target (Spot) Ratio, Field of View, Environmental Conditions, Ambient Temperatures and Emissivity.
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Temperature Monitoring of Rotary Kiln Shell
In cement manufacturing processes, it is clear that one of the most critical steps takes place in the rotary kiln. When it comes to extending the life of this piece of equipment, as well as preventing failures, it is imperative that operators understand the condition of the refractory material coating it.
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Growing Industrial Value for Fixed Thermal Imaging
Overheating, underheating, hot spots, and other undesirable temperature-related conditions can be detected early with thermal imagers and proactively addressed before the situation escalates. Compared to the old days, this is a monumental improvement.
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What is emissivity?
Emissivity is the measure of an object's ability to emit infrared energy. Emitted energy indicates the temperature of the object. Emissivity can have a value from 0 (shiny mirror) to 1.0 (blackbody). Most organic, painted, or oxidized surfaces have emissivity values close to 0.95.
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Emissivity - Non-metals
Some common non-metals are asphalt, carbon, glass, paper and plastic.
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Emissivity - Metals
Common metals are steel, copper, iron, titanium and zinc, among others.
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Frequently Asked Questions about IR Sensors
What is a two-color pyrometer? What happens if the IR sensor is overheated? How do I calibrate my instrument? Find these answers and more.
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