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Step change improvements in high temperature thermocouple thermomery

Machin, G; Pearce, J (2012) Step change improvements in high temperature thermocouple thermomery. In: 2012 UKACC International Conference on Control (CONTROL), 3-5 September 2012, Cardiff, UK.

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Abstract

Thermocouples are the most widely used and most widely misunderstood temperature sensor in industry. This paper will begin with an introduction to thermocouples, how they work and the different types of thermocouple. The commonest and most misunderstood source of uncertainty, homogeneity will be described. The paper will then discuss the concept of traceability and new calibration methods that can give <1 ºC uncertainty up to 1500 ºC. The paper will conclude by describing some thermocouple innovations; a) industrial versions of pure thermoelement types (Pt/Pd) and b) self-validating 'smart-sensors' which enable thermocouples to remain in calibration even when operating at extreme temperatures eg W-Re refractory metal types above 2200 ºC.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Keywords: energy efficiency, industrial process, smart sensors, high temperatures, thermocouples, calibration, traceability, uncertainty
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Identification number/DOI: 10.1109/CONTROL.2012.6334704
Last Modified: 02 Feb 2018 13:14
URI: http://eprintspublications.npl.co.uk/id/eprint/5632

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