Physics Project- Resistance Temperature Detectors.pptx

Physics Project- Resistance Temperature Detectors

1. Resistance temperature detectors By Jeremy Samaroo, Adam Rampersad, Matthew Wilcox, Scott Sadoo, Charles Secord and Lucas Simon-Thompson.

2. Resistance temperature detectors,aka RTD’s An RTD is a type of input signal ,commonly used in industrial applications(like industrial boilers and petrochemical) for collecting temperature data RTD’s use a specific metal ,which, depending of the resistance measured in that metal, can determine its temperature The actual measurement occurs at the element, a part of the device that collects the data to provide accurate temp readings

3. Common RTD’s Thin film element- thin layer of resistant metals Wire wound element- greater accuracy & temp ranges, slight measurement errors due to stress Coiled element- strain fee measurement, accurate measurements

4. How do they work? RTD’s are based on the coloration between metal temperature and resistance. They consist of a length of fine wire wrapped around a heat resistant glass or ceramic core. The wire is pure metal, typically platinum (Pt), nickel (Ni), or copper (Cu). These materials have an accurate resistance/temperature relationship. This means that as the temperature of the metal increases, so does its electrical resistance. Based on the resistance of the metal, we can then determine the temperature.

5. Advantages and Disadvantages of an RTD Advantages High level of accuracy, even in extreme environments. Very wide operating range. Used when temperature measurement is critical due to high accuracy. Very stable and reliable. Disadvantages Slower response time than a thermocouple At lower temperatures, RTD’s aren’t as accurate Its affected by shock and vibration High initial cost At temperatures above  660 °C it is very difficult to prevent the platinum from being contaminated by impurities.

6. Historic background behind the RTD The first RTD can be traced back to 1860. it was assembled by C.W. Siemens. Later, in 1871, Siemens invented the Platinum RTD, but it was not used due to unstable temperature readings. In 1885, Hugh Longbourne Callender developed the first commercially successful platinum RTD. In 1932, C.H. Meyers invented the first RTD that used the electrical resistance of a platinum wire. This became the standard for all RTDs to come.

7. Uses of RTDs RTDs can be used in a variety of industrial applications including industrial boilers, petrochemical, exhaust gas monitoring and food processing. 

8. Everyday Uses and Jobs of Resistance Temperature Detectors Resistance Temperature Detectors (RTDs) are commonly used in various industries where precise temperature measurement is crucial. Some jobs that frequently utilize RTDs include: 1. Manufacturing: Industries such as automotive, aerospace, and electronics rely on RTDs for monitoring temperature during production processes. 2. Chemical Processing: RTDs are used in chemical plants to ensure safe operating temperatures for reactions and equipment. 3. Food and Beverage Industry: RTDs help maintain temperature control in food processing, storage, and transportation, ensuring quality and safety standards are met.