Infrared technology targets industrial automation

By Andrew Wilson Infrared technology targets industrial automation IR cameras are used in industrial-plant monitoring and more and more in industrial automation.By Andrew Wilson, Editor English astronomer Sir William Hershel is credited with the discovery of infrared (IR) radiation in 1800. In his first experiment, Hershel subjected a liquid in a glass thermometer to different colors of the spectrum. Finding that the hottest temperature was beyond re
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Photosensors...

In the previous company i was connected with, a great deal of photosensors or photoswitches are used to detect workpiece presence. There were of different models and shapes. Despite their different physical appearance, almost all follow one principle of operation.A photosensor is an electronic component that detects the presence of visible light, infrared transmission (IR), and/or ultraviolet (UV) energy. Most photosensors consist of semiconductor having a property called photoconductivity , in which the electrical conductance varies depending on the intensity of radiation striking the materi
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A Quick Guide to Thermocouples

Background Thermocouples are the most popular temperature sensors. They are cheap, interchangeable, have standard connectors and can measure a wide range of temperatures. The main limitation is accuracy, system errors of less than 1°C can be difficult to achieve. How They Work In 1822, an Estonian physician named Thomas Seebeck discovered (accidentally) that the junction between two metals generates a voltage which is a function of temperature. Thermocouples rely on this Seebeck effect. Although almost any two types of metal can be used to make a thermocouple, a number of
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