How Do Digital Thermometers Work? Thermometers used to be simple. First, there was a glass tube filled with a liquid that expanded up the tube as the temperature increased. We all understood how that worked. Then came the bi-metal thermometers. They were made from a layered strip of 2 metals with different coefficients of expansion…
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RTD Thermometers: Reading Temperature
Reading Temperature RTD, PRTD, PT100: What’s the Difference? Let TEGAM Explain: An RTD is a Resistance Temperature Detector. Resistance Temperature Detectors (RTD) use the physical properties of metals where the resistance changes proportionally with temperature. This change is much more linear than a thermocouple. The resistance change is defined by the composition of the…
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Advantages of Contact Thermometers over Non-Contact/Infrared Thermometers
Understanding the difference between contact and non-contact temperature measurements is vital to addressing health, safety and quality issues in a wide range of industries. Use of thermometers to measure temperature has been around for centuries and it is the second most frequently measured physical quantity after time. Various fields, including civil, mechanical, medical, manufacturing, quality…
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