Characteristics of an RTD
Let us now see some of the characteristics of an RTD
- Intrinsic Accuracy: Out of the all three transducers, thermistor, thermocouple and RTDs, the resistance temperature detectors have the highest accuracy for temperature prediction which makes them the best choice.
- Linear Nature: RTDs have a good linear characteristics over a large range of temperature. This means that they follow a general linear equation and therefore their graph can be plotted easily predicting the future resistance values.
- Different Shapes: RTDs come in various shapes and sizes . This means we are free to choose their configurations depending on our need. They can be shielded or open units for both immersion and surface applications.
- Passive Device: an RTD is a passive device meaning it doesn’t produce an output on its own. In order to measure the current an external supply of current is required to be passed through it which inflicts a temperature change and then measurement can be made.
- Stable: It has great stability due to small drift. It is stable over a range of 260-8500C.
Resistance Temperature Detector or RTD
In the electronics industry, we often need to deal with measuring certain quantities with precision and accuracy. One such quantity is temperature. There are different methods that can be used for measuring temperature depending on the operation range, sensitivity, frequency response, ruggedness, and other electrical parameters. In this article we will study what is an RTD, and how it works. We will also study the characteristics of an RTD.
In addition to that, we will study the advantages and disadvantages of an RTD. To study the real-life use of RTDs, we will study the applications of an RTD. In the end, some solved examples and some practice questions are provided for a better understanding of concepts. The article concludes with a summary in the end and some frequently asked questions.
Table of Content
- RTD
- Construction
- Working
- Signal Conditioning
- Mathematical Equations
- Graph
- Characteristics
- Advantages of an RTD
- Disadvantages of an RTD
- Applications of an RTD