Semi Standard Thermocouples – Isotech


– Wide Temperature Ranges
– Noble Metal & Type N for best life, stability and reproducibility
– Can be supplied with UKAS calibration


These thermocouples are suitable for use as references in Isotech Dry Blocks and for use with temperature indicators. Details of our laboratory grade Standard Thermocouples with separate cold junctions can be found in our publication “Solutions for Primary and Secondary Laboratories”.

These semi standards are lower cost and suitable for a variety of industrial applications.

The 935-14-91 is constructed from Platinum and Platinum Rhodium alloys and can be used to 1300°C. Recommended for the Pegasus 1200 and general purpose applications. It has 1M of compensating cable terminated with a miniature thermocouple plug. The 935-14-88 is similar to the 14-91 but is made entirely from precious metals, with platinum wires all the way to the miniature plug.

There are a range of high quality mineral insulated metal sheathed (MIMS) Type N thermocouples. These devices are lower cost than the noble metal types and can be bent to a desired shape if required. They are suitable for use in Isotech Dry Blocks and for general purpose measurement and calibration applications.

The system accuracy or uncertainty will depend on the application and what instrument they are used with. The table shows the uncertainties that we can offer with optional UKAS calibration from our accredited laboratory.


Model & Diameter Length Range Application Type
925-14-91/ R – 5mm 300mm 0 to 1300°C Pegasus R
935-14-91/S – 5mm 300mm 0 to 1300°C General Purpose S
Termination: 1m extension cable to miniature plug
935-14-88/R – 5mm 300mm 0 to 1300°C Working Industrial Standard R
935-14-88/S – 5mm 300mm 0 to 1300°C S
Termination: 1M Platinum cable to miniature plug


Isotech Semi Standard Thermocouples-DpstarGroup