Resistance Temperature Detectors (RTD)

Resistance Temperature Detectors (RTD)

Therm-x manufactures RTDs for use in labs and multiple industries where processes require accurate and higher resolution as well as higher isolation resistance than thermocouples

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 .062” - .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 differ-ent sizes are manufactured by different production methods. Therm-x uses the highest qualty 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 character-istics 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 0.0C )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 assem-bly 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 0C, 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 oC


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