The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform
Robin E Bentley - One of the best experts on this subject based on the ideXlab platform.
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long term drift in mineral insulated Nicrosil sheathed type k thermocouples
Sensors and Actuators A-physical, 1990Co-Authors: Robin E BentleyAbstract:Abstract The drift in signal for Nicrosil-sheathed type K thermocouple probes has been measured over 1000 h at temperatures up to 1300 °C. It is shown that thermoelectric hysteresis is the dominant process for temperatures below 800 °C, giving drifts of up to 1.5 °C. At higher temperatures the drift is influenced by irreversible changes in Seeback coefficient and is below 3 °C when A1 and Mn are present in the negative thermoelement and Nicrosil is used as the sheathing alloy. This represents a ten-fold improvement in stability over conventional type K probes. Since hysteresis in type N alloys extends over twice the temperature range of that in type K, some comparisons have been made between the two types at 500 and 1000 °C. The drift is larger in the type N probes, being + 5 °C at 1000 °C.
J Ancsin - One of the best experts on this subject based on the ideXlab platform.
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concerning the stability of some base metal thermocouples chromel alumel nisil Nicrosil ni versus pt
Metrologia, 1996Co-Authors: J AncsinAbstract:Drift of emf in bare-wire, base metal thermocouples is linked to the precipitation of alloying components that supersaturate the host (Ni) lattice. Using a simple phenomenological description, one can visualize the process of precipitation from supersaturated solid solutions. Some possible reasons for the changes in alloy composition in metal sheathed thermocouples are suggested.
A Beswick - One of the best experts on this subject based on the ideXlab platform.
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an evaluation of sheathed Nicrosil nisil thermocouples up to 1300 c
Materials at High Temperatures, 1992Co-Authors: R L Rusby, D F Carter, A BeswickAbstract:This paper describes a study of the high-temperature performance of nickel-chromium-silicon/nickel-silicon-magnesium (Nicrosil/Nisil or Type N) thermocouples, sheathed in alloys similar in composition to Nicrosil. Thermocouples from two sources were tested for stability under continuous exposure to progressively higher temperatures within the range 1000 to 1300°C, and for stability under temperature cycling within this range. Inconel-sheathed Type K thermocouples were included for comparison purposes, and immersion tests were also made.
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An evaluation of sheathed Nicrosil/Nisil thermocouples up to 1300°C
Materials at High Temperatures, 1992Co-Authors: R L Rusby, D F Carter, A BeswickAbstract:This paper describes a study of the high-temperature performance of nickel-chromium-silicon/nickel-silicon-magnesium (Nicrosil/Nisil or Type N) thermocouples, sheathed in alloys similar in composition to Nicrosil. Thermocouples from two sources were tested for stability under continuous exposure to progressively higher temperatures within the range 1000 to 1300°C, and for stability under temperature cycling within this range. Inconel-sheathed Type K thermocouples were included for comparison purposes, and immersion tests were also made.
A A Ulanowsky - One of the best experts on this subject based on the ideXlab platform.
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stability of a cable Nicrosil nisil thermocouple under thermal cycling
TEMPERATURE: Its Measurement and Control in Science and Industry; Volume VII; Eighth Temperature Symposium, 2003Co-Authors: A V Belevtsev, A V Karzhavin, A A UlanowskyAbstract:Experimental data on the stability of cable Nicrosil‐Nisil thermocouples (type N) under step‐by‐step thermal cycling in the temperature range 20 to 1100°C and also under long‐term heating in air at the temperature 1085 ± 10 °C are presented. The analysis of the influence of thermal cycling on thermal EMF drift is carried out. We conclude that N type thermocouples can be used as the reference thermocouple for the calibration of industrial base‐metal thermocouples.
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Stability of a Cable Nicrosil‐Nisil Thermocouple under Thermal Cycling
AIP Conference Proceedings, 2003Co-Authors: A V Belevtsev, A V Karzhavin, A A UlanowskyAbstract:Experimental data on the stability of cable Nicrosil‐Nisil thermocouples (type N) under step‐by‐step thermal cycling in the temperature range 20 to 1100°C and also under long‐term heating in air at the temperature 1085 ± 10 °C are presented. The analysis of the influence of thermal cycling on thermal EMF drift is carried out. We conclude that N type thermocouples can be used as the reference thermocouple for the calibration of industrial base‐metal thermocouples.
R L Rusby - One of the best experts on this subject based on the ideXlab platform.
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an evaluation of sheathed Nicrosil nisil thermocouples up to 1300 c
Materials at High Temperatures, 1992Co-Authors: R L Rusby, D F Carter, A BeswickAbstract:This paper describes a study of the high-temperature performance of nickel-chromium-silicon/nickel-silicon-magnesium (Nicrosil/Nisil or Type N) thermocouples, sheathed in alloys similar in composition to Nicrosil. Thermocouples from two sources were tested for stability under continuous exposure to progressively higher temperatures within the range 1000 to 1300°C, and for stability under temperature cycling within this range. Inconel-sheathed Type K thermocouples were included for comparison purposes, and immersion tests were also made.
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An evaluation of sheathed Nicrosil/Nisil thermocouples up to 1300°C
Materials at High Temperatures, 1992Co-Authors: R L Rusby, D F Carter, A BeswickAbstract:This paper describes a study of the high-temperature performance of nickel-chromium-silicon/nickel-silicon-magnesium (Nicrosil/Nisil or Type N) thermocouples, sheathed in alloys similar in composition to Nicrosil. Thermocouples from two sources were tested for stability under continuous exposure to progressively higher temperatures within the range 1000 to 1300°C, and for stability under temperature cycling within this range. Inconel-sheathed Type K thermocouples were included for comparison purposes, and immersion tests were also made.