Our current portfolio of Mica-insulated Hot Disk® sensors for Isotropic, Anisotropic, Slab and One-dimensional measurements, with operating temperature from 300 °C up to 800 °C (or 1000 °C in special cases), are listed in the following table, followed by photos and detailed dimensions further down:

Sensor model: Radius (mm):
7577 * 2.0
5465 ** 3.2
5082 6.6
4921 9.7
4922 14.6
4922L *** 14.6 with extended leads
5599 29.5
5599L *** 29.5 with extended leads

* Only for one-dimensional measurements.
** For applications with thermal conductivity larger than 5 W/(mK), the Cp-value must be known beforehand.
*** Intended for large and very high-conducting samples.

The Mica-insulated Hot Disk® sensors are delivered without cables and the sensors are instead mounted in special sensor holders to which electrical leads are attached.

Mica-insulated Hot Disk® Sensors – Standard

  • Illustration of the Standard Sensors dimensions

    Model Dimensions

    • ∅ = Diameter double spiral
    • A = Effective sensor length
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    Model 7577

    • ∅ = 4.0 mm
    • A = 49 mm
  • Mica-insulated Hot Disk® Sensor model 5465

    Model 5465

    • ∅ = 6.4 mm
    • A = 49 mm
  • Mica-insulated Hot Disk® Sensor model 5082

    Model 5082

    • ∅ = 13.2 mm
    • A = 49 mm
  • Mica-insulated Hot Disk® Sensor model 4921

    Model 4921

    • ∅ = 19.4 mm
    • A = 50 mm
  • Mica-insulated Hot Disk® Sensor model 4922

    Model 4922

    • ∅ = 29.2 mm
    • A = 50 mm
  • Mica-insulated Hot Disk® Sensor model 5599

    Model 5599

    • ∅ = 59.0 mm
    • A = 66 mm

Mica-insulated Hot Disk® Sensors – Extended length

  • Illustration of the Extended Length Sensors dimensions

    Model Dimensions

    • ∅ = Diameter double spiral
    • A = Effective sensor length
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    Model 4922L

    • ∅ = 29.2 mm
    • A = 102 mm
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    Model 5599L

    • ∅ = 59.0 mm
    • A = 118 mm