Resistance temperature detector or RTD sensors are amongst the absolute most commonly used forms of temperature sensors in industrial applications. While thermistors and thermocouples are very popular as well, but RTDs are considered better in terms of the stability they feature over a time period and accuracy over a variety of temperature. Both these factors make sure they are a great choice for several industrial applications.
The cornerstone of and RTD is that it works such as for instance a resistor that changes its value with change in temperature. Several materials have a characteristic that permits a predictable resistance temperature detector change inside their resistance with change in temperature. This makes acquiring highly consistent and accurate temperature measurements quite easy. Most RTDs respond between 0.5 to 5 seconds. RTDs may be constructed using different materials, including copper, platinum, and nickel.
RTDs used in different applications could have different specifications. The Temperature coefficient of resistance and base resistance are amongst the most important specifications for RTDs. Base resistance value may vary remarkably and rely on the material; from 10 Ohms to several thousand Ohms.
The temperature coefficient of resistance is important to the instrument that’s being used in measuring temperature changes with respect to the base resistance, and has nothing related to the accuracy of the sensor.
When we think about the working of thermistors, thermocouples, and RTDs, we find that RTDs tend to be more stable and accurate over time. RTDs are highly repeatable as well. This implies that they can precisely calculate similar temperatures with minimum discrepancies, even when they’re used in repeated cooling and heating cycles. On another hand, a thermocouple is less precise and can deliver values with few discrepancies. As a lot of the industrial applications can perform without instant responses to changes in temperature, RTDs are considered a great solution for them.
If you are considering buying RTDs, you should make sure that you element in the accuracy made available from the sensor in different industrial settings. May be the RTD sensor you will buy rugged enough for the harsh environment you is likely to be tried it in?
Resistance temperature detectors are used in a number of applications, including flame-proof and explosion-proof applications. Even with all these benefits, you still need to be sure you buy the proper sensor from the proper place. Consider your needs and then try to find RTD sensors that suit them perfectly. You can go online try to find companies that offer RTDs, thermocouples, and thermistors.