What is an RTD?
RTDs are used in industrial process to measure temperature. It is commonly made of platinum, nickel, or copper element. in pipes, bioreactors, vessels, or tank.
How does it work?
An RTD works on the principle of the temperature coefficient of resistance, which states that the resistance of a material changes with temperature. The RTD element is made of a metal wire, which is surrounded by ceramic or glass core. When the temperature of the wire changes, its resistance changes proportionally. This change in resistance is then measured using a bridge circuit, which is used to convert the resistance change into an electrical signal that can be read by a temperature controller or data acquisition system.
What are some advantages of RTDs?
1. High Accuracy – provide reliable temperature measurement over a wide range of temperatures.
2. Stability – highly stable over time and have a long lifespan.
3. Linearity – linear relationship between temperature and resistance, which simplifies the calibration process.
4. High Sensitivity – Can detect small changes in temperature.
What are best applications?
The best applications for RTDs are in the chemical, aerospace, food, and pharmaceutical industries.
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