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Resistance Temperature Detectors (RTD)
An RTD sensor comprises a fine wire that is wrapped in a glass or ceramic core. The fine wire is made of pure metal, with known temperature resistance. Therm-X provides RTD sensor solutions for industries such as semiconductor wafer processing, automotive engineering, food and beverage processing and several other industries, where accurate temperature measurement is critical for correct process outcomes. So, we use only the highest quality RTD elements in sensors. Our RTD solutions are covered under DIN Class A, DIN Class B, and 1/3 DIN tolerance specifications. Our resistance temperature detectors (RTDs) can be availed as standard or customized configurations. The standard RTD assemblies feature thin-film elements conforming to IEC class B.
Therm-X specializes in custom RTD solutions. This means we can customize them with special RTD elements, connections, enclosures, mounting hardware, with screw-on and spring-loaded bushings to meet your complex application requirements. We also provide optional calibration services. Our custom special- purpose RTD solutions find applications in heavy-duty environments, where they may be exposed to chemicals, high temperatures, and other elements. Therm-X custom RTD solutions are designed to withstand operating temperatures from -50°C to 400°C. Therm-X RTD products are designed and built to DIN EN 60751 specifications. N.I.S.T certifications and special tolerances are available on request.
Custom Options
- Single or Multi Point (Dual RTD TC)
- Helium Leak tested
- Optional Calibration
- Optional screw on and spring loaded bushings
- Operating temperatures -50°C - 400°C
- Accuracy dependent on Class
- Electro polished
- Passivated
- Clean room packaged
Specify "A" dimension and lead length
- 100 ohm Din Class A thin film RTD Element
- Threaded or Bayonet fitting
- Diameter ranges 0.062" - 0.250"
- Teflon 2 or 3 wire leads
- Standard operating temperatures 50°C (-58°F) to +260°C (500°F). Higher temps available
- Dual RTD and TC options available
- Electro polished
- Passivated
- Clean room packaged
Resistance Temperature Detectors (RTD) With reduced tip
Specify "A", "B" and "C" dimensions
- 100 ohm Din Class A thin film RTD Element
- Threaded or Bayonet fitting
- reduced .062 Tip
- Straight or bent
- Standard operating temperatures 50°C (-58°F) to +260°C (500°F). Higher temps available
- Operating temperatures -50°C - 400°C
- 2 or 3 wire
- Electro polished
- Passivated
- Clean room packaged
RTD Specifications
One of the most important industrial process variables is temperature which affects the quality of product and the safety of the installation. There is no single sensor which is equally suitable for all applications, so sensors of different sizes are manufactured by different production methods. Therm-X uses the highest quality Resistance elements in the manufacturing of our sensors. Tolerances the platinum sensor Pt 100 is defined by the international Standard IEC 751. This definition covers the characteristics and two tolerance classes, Class A and Class B. The permitted error limit increases with the measurement temperature. Each class consists of a tolerance on the nominal value (resistance at 0.0°C) and a deviation depending on temperature. Class tolerances are tested in the element form. Packaging and lead terminations affect the stated tolerance. Therm-X standard assemblies incorporate thin film elements conforming to IEC class B. Controlled assembly procedures are utilized to minimize packaging effects to tolerances. Special tolerances and N.I.S.T. certifications are available upon request for a nominal charge. For a Class A sensor the following relationship applies where "T" is the absolute temperature: AT=±(0.15+0.002 * t) For t =75°C, the tolerance is therefore: AT=±(0.15+0.002 * 75)=±0.3°C For a Class B sensor the following relationship applies: AT= ±(0.3+0.005 * t). In the above example the deviation is therefore: AT= ±(0.3 + 0.005 * 75) = ±0.675°C
