Resistance temperature detector or RTD sensors are amongst the absolute most commonly used types of temperature sensors in industrial applications. While thermistors and thermocouples are quite popular as well, but RTDs are considered better when it comes to the stability they give over a period of time and accuracy over a range of temperature. Both these factors cause them to become a great selection for a number of industrial applications.
The basis 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 could 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 important specifications for RTDs. Base resistance value may vary remarkably and be determined by the material; from 10 Ohms to thousands of Ohms.
The temperature coefficient of resistance is important to the instrument that’s being found in measuring temperature changes depending on the base resistance, and has nothing to do with the accuracy of the sensor.
If we consider the working of thermistors, thermocouples, and RTDs, we see that RTDs are far more stable and accurate over time. RTDs are highly repeatable as well. What this means is that they may precisely calculate similar temperatures with minimum discrepancies, even when they are found in repeated cooling and heating cycles. On another hand, a thermocouple is less precise and can deliver values with few discrepancies. As most of the industrial applications may do without instant responses to changes in temperature, RTDs are considered a great solution for them.
When you’re considering buying RTDs, you ought to be sure that you element in the accuracy provided by the sensor in various industrial settings. May be the RTD sensor you are going to buy rugged enough for the harsh environment you will soon be used 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 certainly to ensure you buy the right sensor from the right place. Consider your needs and then try to find RTD sensors that fit them perfectly. You can go online try to find companies that offer RTDs, thermocouples, and thermistors.