What is RTD Sensor and How Does it Work?

1. What is RTD Sensor and How Does it Work RTD or Resistance Temperature Detector are the passive devices which are used to measure and control temperature across industrial applications. It is a sensor whose resistance changes as its temperature changes. RTD Sensors are highly accurate, reliable and are designed for stability in harsh environments. Due to these beneficial features RTDs are used across industries where the slightest of temperature changes affect the entire process. Lets now discuss more about RTD sensors and its working. Types of Resistance Elements – Wide variety of elements are used to manufacture RTD sensors. Resistance Elements are the integral part of an RTD and should not be used in the raw form as they are too fragile and sensitive. The most common element is Platinum as it can resist harsh environments. Others metals like Copper, Nickel, Balco are also used. Benefits of using Platinum RTDs: Platinum is the best option among other elements due to its beneficial features: •It is chemically inert •Offers Stable and linear temperature resistance equation •It offers a good enough temperature coefficient which enables RTD to sense quick resistance changes What are the different Sensor Connections: RTDs usually have 2, 3 or 4 wires and usage largely depends on the cabling. The accuracy of an RTD depends upon the number of wires to some extent. • 2 Wire RTDs – Theseare commonly used in non-critical applications. •3 Wire RTDs – These sensors provide a good combination of accuracy and convenience. Structural Elements of RTD Sensor: •Resistance Element •Wires •Tubing •Connection Fittings •Outer Diameter of RTD •Cold End Termination To know more about the working of RTD Sensors visit: https://www.transmittershop.com/blog/rtd-sensors-how-does-rtd-work/