Disadvantages of an RTD
Let us now some disadvantages of RTDs
- One major disadvantage of RTDS is their long response time. Response time is how quickly can a device respond to the given input or stimuli and RTDs have longer response time as compared to thermocouple.
- Another disadvantage of RTDs is they are expensive. Due to the features it offers its cost is generally high as compared to thermistor and thermocouple which increases average cost of purchase.
- They can often cause self-heating in-case current value exceeds slightly than the limit. The resistance is measured by passing current through the wire therefore it can cause heating in the wire.
- The overall temperature range in which RTDs work is often small . Quantitively the range is around 260-8500C which is less as compared to the range over which other devices work.
- RTDs have low sensitivity meaning that they can’t detect small changes very well but thermocouples can do so. Due to low sensitivity, point sensing is not possible inn case of RTDs.
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