Isotech Semi Standard PRTs

Isotech Semi Standard PRTs

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Semi Standard Platinum Resistance Thermometers

Reference PRT Thermometers: -200°C to 670°C (1238°F)

  • Accuracy: as low as ±5mk (0.005°C)
  • Stability: High-stability, hand-wound platinum elements
  • Versatility: Many different sizes, constructions, and temperature ranges
  • Perfect for Reference probes in Dry Block and Liquid bath
Category: Temperature


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These industrial platinum resistance thermometers are ideal for field and lab use. Suitable for use as working standards in Dry Blocks and Liquid Baths or as high accuracy probes for our range of True Temperature Indicators.

All the thermometers are metal sheathed and both less fragile, and more affordable than the Isotech range of true Standard Platinum Resistance Thermometers that are used in laboratories and our found in our publication “Solutions for Primary and Secondary Laboratories”.

All the thermometers use handmade coil wound platinum sensing elements to give high accuracy and low drift.

Technical Feature Value
Ro 100Ω ± 0.05Ω
Alpha 0.003850 ± 0.000005
Standard IEC 60751
Stability 0.010Ω/ year
Recommended Current 1mA
Self Heating at 1mA 0.004°C
Calibration Optional UKAS Calibration at extra cost. See table for typical uncertainties.
Connection 4 Wire
Max. Handle Temperature 80°C