Mineral Insulated RTDs

Mineral Insulated RTD

Mineral Insulated RTD Characteristics:

  • High accuracy and stability
  • No compensating cable
  • No Cold Junction compensation
  • Good linearity
  • Rigid and robust construction providing good mechanical strength and high vibration endurance

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RTD Types:

PT100 – Platinum, 100 ohm at 0 degrees C

PT1000 – Platinum, 1000 ohm at 0 degrees C

Sheaths and Conductors:

RTDs are available in Simplex and Duplex form.

Standard sheath materials include 316 Stainless Steel, 321 Stainless Steel.

For higher temperature applications, a nickel sheath is preferred. Conductors are usually either copper or nickel.


RTD’s are available as standard in tolerance classes A and B.

Closer tolerance devices, commonly known as 1/3, 1/5 or 1/10 DIN.

Probe Sheath Diameters Available:

3mm, 4.5mm, 6mm, 8mm.


ITH Ltd’s range of Mineral Insulated Resistance Temperature Detectors (RTD’s) comprise a wire wound or thin film Platinum Resistance Sensing device. The sensing elements resistance increases with temperature in a known and repeatable manner, and as a result exhibits an excellent accuracy over a wide temperature range.

The Platinum RTD produces a more linear curve than thermocouples and is used when accuracy of output is important, as they are less sensitive to change than thermocouples.

Platinum resistance sensors offer the highest standard of accuracy and stability of any temperature sensor, providing good linear response covering a temperature range from – 200 degrees C to 650 degrees C.

The ITH Ltd range of mineral insulated RTD’s are manufactured from superior grade materials and we provide technical support to ensure you get the appropriate sensor to meet exactly your needs.