Körtvélyessy GmbH • Portal


Welcome to the webportal of thermo-control Körtvélyessy GmbH! 

Since 1982 we manufacture free of drift PlatinRhodium – Platin Thermoelemente. Below you will find our product protfolio.

 Non-drifting PtRh-Pt Thermocouples » How it works

Product portfolio


  • separate, thin ceramic protection tubes
  • high process stability
  • up to 4 years warranty for PtRh – Pt Thermocouples
  • conformance to AMS 2750 to Secondary Standard


  • passend für alle thermo-control Thermoelemente
  • Standardlängen 400mm bis 1500mm
  • Kalibrierschein nach AMS-2750 möglich
  • empfohlenes Rekalibrierungs-Intervall 10 Jahre


  • view manufacturing data any time
  • optionally view calibration data
  • optionally download certificates

Oxygen probes

  • full ceramic built
  • high precision generation of the Nernst voltage
  • runs mostly without external air supply


thermo-control news, event and trade shows

Long Vacuum Thermocouples

Today two vacuum thermocouples with a nominal length of 1900mm were delivered. For us a record, because this nominal length has not been made, so far. The production was quite demanding. From 140 launched protective tubes, only 40 were approved by the...

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Dalian Leader awarded as sole sales agent for China

Coming effective 2018-02-01 thermo-control Körtvélyessy GmbH is proud to announce Dalian Leader Fluid Technology Ltd. as its sole sales and aftermarket agent for the territory of the peoples republic of China. Dalian Fluid will take care of the sales and...

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Interview Gas-Wärme-International

Today, an interview with Managing Director Daniel Körtvélyessy was published in Gas-Wärme-International in the category "Nachgefragt". Read the interview here

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HeatTreatmentCongress 2018

As every year since 1986, we will be at the HärtereiKongress in Cologne. Please note that the congress starts on Tuesday! You may find us at booth A-037. This years focus of the congress Materials and heat treatment for e-mobility Integration of the heat...

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Non-drifting PtRh-Pt thermocouples

designs and manufactures high-end PtRh – Pt thermocouples. The patented design gives them outstanding properties in precision, lifetime and reliability.

A prominent feature is the use of different diameters of the thermocouple wires. As a result, the temperature-induced drift of the individual wires cancel each other out. The result is a thermocouple that will never drift!

ΔT New ΔT Year 1 ΔT Year 2 ΔT Year 3
Positive wire (PtRh10%) +0,0K +1,0K +1,5K +2,0K
Negative wire (Pt) +0,0K +5,0K +8,0K +10,0K
ΔT = Drift = Positive – Negative 0,0K -4,0K -6,5K -8,0K
ΔT New ΔT Year 1 ΔT Year 2 ΔT Year 3
Positive wire (PtRh10%) +0,0K +1,0K +1,5K +2,0K
Negativer Draht (Pt) +0,0K +1,0K +1,5K +2,0K
ΔT = Drift = Positive – Negative 0,0K 0,0K 0,0K 0,0K

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