DIN
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Acronym for Deutsche Industrial Norme, the German agency that sets engineering and dimensional standards. Responsible for establishing the world recognized alpha of 0.00385055 ohm/ohm/°C or DIN 43760.
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| Draw |
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Thermocouple cable is drawn though progressive dies / size reductions to achieve the smaller, more compact end result required.
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| Draw down |
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A thermocouple with a reduced tip for fast response. The Pyrotenax versions are made the same way as the cable - slowly drawn though progressive die reductions. This has considerable user advantages compared to the cheaper rotary swaging that is often used.
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| Drift / EMF Drift |
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The progressive drift away from accuracy of a thermocouple with thime - accelerated in extremes of temperature or temperature cycling
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Duplex
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Two thermocouples within the same sheath - ie 4 core rods or 2 of each of + & - legs. Pyrotenax can provide these in parallel or diagonal configurations.
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| Electromotive Force (emf) |
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Difference of potential produced by sources of electrical energy which can be used to drive currents through external circuits. Unit is the volt.
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| EMF |
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Electromotive force is related to the potential force or millivolt output of a thermocouple, the size of which is determined by the pair of dissimilar metals used in the thermocouple and the temperature.
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| E-Type Thermocouple |
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Chromel-constantan thermocouple with a temperature range of 0 to 800 °C.
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| Explosion Proof Equipment |
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Equipment enclosed in a housing which is capable of withstanding an explosion of a specified gas or vapor which may occur inside it, and of preventing the ignition of a specified gas or vapor surrounding the enclosure by an explosion within, and which operates at an external temperature not capable of igniting a surrounding flammable atmosphere.
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| Exposed Junction |
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Thermocouple junction protrudes out of sheath tip, results in quickest response time, but limited to use in non-corrosive, non-pressurized applications.
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| Extension cable |
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A pair of wires connecting a thermocouple sensor to its reference junction or instrumentation. The emf characteristics of the extension wire should be similar to the thermocouple emf characteristics.
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| Fahrenheit |
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Temperature scale used now mainly in the USA which designates 32° as the ice point and 212° as the boiling point.
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| FEP |
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An abbreviation for Fluorinated Ethylene Propylene. This component is commonly referred to as "Teflon®".
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Ferrule
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A Tubular Fitting That Is Compressed Onto A Probe Inside A Compression Fitting That Is Compressed Onto The Probe Itself.
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| Flexible cable |
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Pliable extension cables used to connect the thermocouple to the measuring instrument outside of the hot zone
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| Freeze Point Standards |
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To Provide Known Fixed Reference Temperatures,The Freeze Point Of Certain Metals,A Precise Temperature Where The Metal Goes From A Liquid Phase To A Solid Phase. Used To Calibrate Platinum Rtds. Typical Examples: Tin: 231.968 Deg C, Zinc: 419.580 Deg C, Aluminum: 660.370 Deg C.
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| Freezing Point |
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The fixed temperature point of a material that occurs during the transition from a liquid to a solid state. This is also known as the melting point for pure materials.
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