Resistive Transducer

Definition: The transducer whose resistance varies because of the environmental effects such type of transducer is known as the resistive transducer. The change in resistance is measured by the ac or dc measuring devices. The resistive transducer is used for measuring the physical quantities like temperature, displacement, vibration etc. The measurement of the physical quantity is …

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Synchro

Definition: The Synchro is a type of transducer which transforms the angular position of the shaft into an electric signal. It is used as an error detector and as a rotary position sensor. The error occurs in the system because of the misalignment of the shaft. The transmitter and the control transformer are the two main …

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Bolometer

Definition: The bolometer is a device used for detecting and measuring the heat and radiation of  Microwave energy or RF.  It uses the temperature sensitive resistive element who resistance changes with the temperature. The Thermistor and Barretter are the examples of the commonly used resistive element. The circuit of the bolometer is in the form …

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Recording Instrument

Definition: The recording instrument is defined as the instrument which records the continuous variation of the magnitude of an electrical quantity for a particular period. It is used in a placed where the continuous reading of circuit conditions is required. The record is used for future reference or computational work. The recording instruments take readings …

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Resolver

Definition: The resolver is a rotary transformer used for conversion of the angular position of the shaft into Cartesian coordinates. It is an analogue device which has a digital counterpart. The output of the transducer has two signals, one is proportional to the sine of the angle and other is proportional to the cosine of …

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Integrating Instrument

Definition: The integrating instrument measures the total energy supplied by the circuit in a given interval of time. It is independent of the rate at which the total energy consumed. The watt hour meter is the example of integrating instruments. This type of meter directly measures the energy in watt hour. Types of Integrating Instruments …

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Analog Instrument

Definition: The analogue instrument is defined as the instrument whose output is the continuous function of time, and they have a constant relation to the input. The physicals quantity like voltage, current, power and energy are measured through the analogue instruments. Most of the analogue instrument use pointer or dial for indicating the magnitude of the …

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Difference Between RTD & Thermistor

The Thermistor and the RTD both are the temperatures measuring device. The major difference between the RTD and the Thermistor is that the RTD is made of metal, whereas the semiconductor material is used for Thermistor.  The other differences between the Thermistor and RTD are explained below in the comparison chart. As the Thermistor is …

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Power Factor Meter

Definition: The power factor meter measures the power factor of a transmission system. The power factor is the cosine of the angle between the voltage and current. The power factor meter determines the types of load using on the line, and it also calculates the losses occur on it. The power factor of the transmission …

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