Resistance Temperature Detectors – Any Being employed & Features
Resistance temperature detector or RTD sensors are amongst the most commonly used types of temperature sensors in industrial applications. While thermistors and thermocouples can be popular as well, but RTDs are considered better in terms of the stability they offer over a time frame and accuracy over a range of temperature. Both these factors make sure they are a good choice for several industrial applications.
The foundation of and RTD is that it works just like a resistor that changes its value with change in temperature. Several materials have a characteristic that permits 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 can 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 main specifications for RTDs. Base resistance value can differ remarkably and be determined by the material; from 10 Ohms to several thousand Ohms.
The temperature coefficient of resistance is vital to the instrument that’s being used in measuring temperature changes depending on the base resistance, and has nothing to do with the accuracy of the sensor.
If we look at 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. What this means is 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 most 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 ought to ensure that you factor in the accuracy offered by the sensor in various industrial settings. May be the RTD sensor you are going to buy rugged enough for the harsh environment you is likely to be tried it in?
Resistance temperature detectors are used in a variety of applications, including flame-proof and explosion-proof applications. Despite having each one of these benefits, you still need to make sure you buy the best sensor from the best place. Consider your preferences and then search for RTD sensors that fit them perfectly. You can go online search for companies that offer RTDs, thermocouples, and thermistors.