Resistance temperature detector or RTD sensors are amongst the most commonly used forms of temperature sensors in industrial applications. While thermistors and thermocouples are quite popular as well, but RTDs are considered better with regards to the stability they offer over a time period and accuracy over a range of temperature. Both these factors make sure they are a good choice for numerous industrial applications.
The foundation of and RTD is so it works such as a resistor that changes its value with change in temperature. Several materials have a characteristic that allows a predictable resistance temperature detector change within 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 found in different applications could have different specifications. The Temperature coefficient of resistance and base resistance are amongst the most crucial specifications for RTDs. Base resistance value can differ remarkably and depend on the material; from 10 Ohms to thousands of Ohms.
The temperature coefficient of resistance is vital to the instrument that is being found in measuring temperature changes with regards to the base resistance, and has nothing to do with the accuracy of the sensor.
When we consider the working of thermistors, thermocouples, and RTDs, we find that RTDs are far more stable and accurate over time. RTDs are highly repeatable as well. What this means is that they’ll precisely calculate similar temperatures with minimum discrepancies, even if they’re found in repeated cooling and heating cycles. On another hand, a thermocouple is less precise and can deliver values with few discrepancies. As all of the industrial applications may do without instant responses to changes in temperature, RTDs are considered a good solution for them.
When you are considering buying RTDs, you must ensure that you element in the accuracy provided by the sensor in various industrial settings. Is the RTD sensor you are going to buy rugged enough for the harsh environment you will undoubtedly be tried it in?
Resistance temperature detectors are found in a number of applications, including flame-proof and explosion-proof applications. Despite every one of these benefits, you still need to make sure you buy the proper sensor from the proper place. Consider your needs and then look for RTD sensors that suit them perfectly. You are able to go online look for companies that provide RTDs, thermocouples, and thermistors.