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Many RTD elements consist of a length of fine wire wrapped around a heat-resistant ceramic or glass core but other constructions are also used. The RTD wire is a pure material, typically platinum (Pt), nickel (Ni), or copper (Cu). The material has an accurate resistance/temperature relationship which is used to provide an indication of temperature.
The Callendar–Van Dusen equation is an equation that describes the relationship between resistance (R) and temperature (T) of platinum resistance thermometers (RTD). As commonly used for commercial applications of RTD thermometers, the relationship between resistance and temperature is given by the following equations.
A PTC thermistor attached in series with each device can assure the current is divided reasonably evenly between the devices. In crystal oscillators for temperature compensation, medical equipment temperature control, and industrial automation, silicon PTC thermistors display a nearly linear positive temperature coefficient (0.7%/°C).
PT100 or PT-100 may refer to: A type of the Taurus PT92 pistol; A type of resistance thermometer; Panzerfaust, a German anti-tank weapon of World War II
An RTD can be fabricated using many different types of materials (such as III–V, type IV, II–VI semiconductor) and different types of resonant tunneling structures, such as the heavily doped p–n junction in Esaki diodes, double barrier, triple barrier, quantum well, or quantum wire.
The driver ADP3418 chip (bottom left), used for driving high-power field transistors in voltage converters. Above it is seen next to such a transistor (06N03LA), probably driven by that driver. In electronics , a driver is a circuit or component used to control another circuit or component, such as a high-power transistor , liquid crystal ...
The complete course included 22 films produced by Aetna in its motion picture bureau, in collaboration with the New York City Department of Education. The final exam film constituted a difficult 25-minute road test including many varied traffic situations and highway emergencies. These films were the first complete driver training course ...
(e.g. rivers, pipelines, regions between two mountains, etc.) An ideal plug flow reactor has a fixed residence time: Any fluid (plug) that enters the reactor at time t {\displaystyle t} will exit the reactor at time t + τ {\displaystyle t+\tau } , where τ {\displaystyle \tau } is the residence time of the reactor.