| J-Type Thermocouple |
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Iron-constantan thermocouple with a temperature range of 0 to 750°C.
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| Junction |
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The Point In A Thermocouple Where The Two Dis- Similar Metals Are Joined. The Junction May Be Formed By A)Silver Soldering, B)Gas Welding C)Arc Welding And D) Resistance Welding, Preferred For Small Dia. Wires. Tig Tungsten Inert Gas Welding Is Preferred For Larger Dia.
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| Kapton |
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A High Temperature (285 Deg C) Insulation For Rtd And Thermocouple Lead Wires. Trademark Dupont Co.
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| Kelvin Temperature Scale |
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Also known as the thermodynamic temperature scale, the Kelvin Scale is an absolute temperature scale in which temperature differences are proportional to the amount of heat energy converted to mechanical work by a Carnot engine. The ice point on the Kelvin Scale is 273.15K.
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KN
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The negative leg of a type K thermocouple. Mainly nickel with small added amounts of aluminum, manganese, and silicon. Company trade names are Alumel, Nial, and HAI-KN. The chemistry is unimportant - the output of the match with the KP leg is the vital consideration
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| KP |
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The positive leg of a type K thermocouple. Mainly nickel with added chromium. Company trade names are chromel, Tophel, and HAI-KP.
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| K-Type Thermocouple |
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Chromel-Alumel thermocouple with a temperature range of -200 to 1200°C.
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| Limit of Error |
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The allowable error in a thermocouple, expressed as a percentage or a specific degree value throughout defined temperature ranges. See Initial Calibration Tolerances.
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| Loop Resistance |
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The total resistance of the thermocouple materials in a thermocouple circuit
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| Magnesia |
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Sintered Crushed & Graded for size, another name for the MgO powder used in making MI thermocouple cable
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| Magnesium oxide |
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Long name for MgO powder used in mineral insulate thermocouple cable
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| Measuring Junction / Hot Junction |
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The point where the 2 dissimilar thermocouple metal core rods are joined & where the measurement takes place. The "other" end to the cold or reference junction
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| MgO |
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Chemical name for magnesia / magnesium oxide powder in MI thermocouples
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Mineral Insulated
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Used to distinguish a powder filled & metal sheathed thermocouple cable from one with flexible cable insulation.
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| Mineral-Insulated Thermocouple |
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A thermocouple that is manufactured from cable made by loading a metal sheath with conductors and insulators, and then compacting to produce a high quality starting point for assembly into thermocouples.
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| Moisture ingress |
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Damaging to a mineral insulated thermocouple as it drops the insulations resistance & eventually destroys the thermocouple. Can be from moisture in gaseous form, so doesn't need to be liquid water.
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| Nicrobel |
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1990's brand name for high Nickel sheath for thermocouples. Tyco Thermal Controls improvement on this is our Pyrosil branded cable.
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| Nicrosil |
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The positive leg of a type N thermocouple. It is predominantly nickel with added chromium and silicon.
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| Nicrosil-Nisil |
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A New Thermocouple (Type N) Developed In Australia To Improve On Type K By Adding Silicon And Magnesium In Each Leg To Stabilize Chromel-Alumel In The 250-550 Deg C Region. Useful From 0-1300 Deg C (32-2372 Deg F)With A Maximum Output Of 47.5 Mv.Nist Monograph 161.
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| Nisil |
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The negative leg of a type N thermocouple. It is predominantly nickel with added silicon and magnesium.
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| NIST |
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National Institute of Standards and Technology
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Noble Metal Thermocouples
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Types B, R, and S noble metal thermocouples are manufactured using platinum or platinum-rhodium.
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NPT
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An abbreviation for American National Standard taper pipe thread. A Fitting That Is Brazed Or Welded Onto An Rtd Or Thermocouple Sheath For Industrial Usage.
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N-Type Thermocouple
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Nicrosil-Nisil thermocouple with a temperature range of -200 to 1200°C.
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Nuclear grade
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Specially designed thermocouple / thermocouple cable with low neutron absorbtion sheaths, high integrity & a wide array of tests to ensure long life in these critical applications. Manufactured in our Trenton facility.
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