Automated temperature monitoring and control ensure food safety

The basics don’t change much “’Sensing elements themselves are pretty stable in that they don’t tend to change,’ says Paul Gobeille, Stellar senior automation engineer. “For example, you’ll find that the theories behind thermocouples (T/Cs), RTDs (resistance temperature detectors), thermistors and infrared (IR) sensors presented in various sources are virtually the same as when they…

Mechanical Temperature Measuring Sensors

Mechanical (liquid-in-glass thermometers, bimetallic strips, bulb & capillary, pressure type etc.) Thermojunctive (thermocouples) Thermoresistive (RTDs and thermistors) Radiative (infrared and optical pyrometers) Mechanical Temperature Measuring devices Principle of Operation A change in temperature causes some kind of mechanical motion, typically due to the fact that most materials expand with a rise in temperature. Mechanical thermometers can be…

Difference Between RTD & Thermocouple

What is RTD? RTDs stands for ‘Resistance Temperature Detectors’ and they are generally referred to as ‘Resistance Thermometers’. RTD can be defined as a temperature sensor that operates on the measurement principle where the materials’ electrical resistance changes with temperature. The American Society for Testing and Materials (ASTM) has defined the term resistance thermometer as follows:…