Hall Effect Transducer

Definition: The hall effect element is a type of transducer used for measuring the magnetic field by converting it into an emf. The direct measurement of the magnetic field is not possible. Thus the Hall Effect Transducer is used. The transducer converts the magnetic field into an electric quantity which is easily measured by the…

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Rotary Variable Differential Transformer (RVDT)

Definition: The transformer which senses the angular displacement of the conductor is known as the Rotary Variable Differential Transformer or RVDT. It is the type of electromechanical transducer which gives the linear output proportional to the input angular displacement. The circuit of RVDT is shown in the figure below. The working of the RVDT is…

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Linear Variable Differential Transformer (LVDT)

Definition: The Linear Variable Inductive Transformer converts the linear displacement into an electrical signal. It works on the principle of mutual induction, i.e., the flux of the primary winding is induced to the secondary winding. The output of the transformer is obtained because of the difference of the secondary voltages, and hence it is called a differential…

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Resistance Thermometer

Definition – The resistance thermometer or resistance temperature detector (RTD) uses the resistance of electrical conductor for measuring the temperature. The resistance of the conductor varies with the time. This property of the conductor is used for measuring the temperature. The main function of the RTD is to give a positive change in resistance with…

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Types of Transducer

The transducer changes the physical quantity into an electrical signal. It is an electronic device which has two main functions, i.e., sensing and transduction. It senses the physical quantity and then converts it into mechanical works or electrical signals. The transducer is of many types, and they can be classified by the following criteria. By transduction…

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Transducer

Definition: The device which converts the one form of energy into another is known as the transducer. The process of conversion is known as transduction. The conversion is done by sensing and transducing the physical quantities like temperature, pressure, sound, etc. The electrical transducer converts the mechanical energy into an electric signal. The electrical signal…

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Applications of Thermistors

The thermistor is a thermal resistor whose resistance depends on the external temperature. The measurement and the control of the temperature are the major applications of the thermistor. The thermistor is also used for various other applications which explain below in details. 1. Measurement of Temperature The thermistor is a resistor whose resistance changes with the…

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Thermistor

Definition: The thermistor is a kind of resistor whose resistivity depends on surrounding temperature. It is a temperature sensitive device. The word thermistor is derived from the word, thermally sensitive resistor. The thermistor is made of the semiconductor material that means their resistance lies between the conductor and the insulator. The variation in the thermistor…

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Owen’s Bridge

Definition: The bridge which measures the inductance in terms of capacitance is known as Owen’s bridge. It works on the principle of comparison i.e., the value of the unknown inductor is compared with the standard capacitor. The connection diagram of Owen’s bridge is shown in the figure. The ab, bc, cd and da are the four arms…

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AC Bridge

Definition: The bridge uses for measuring the value of unknown resistance, inductance and capacitance, is known as the AC Bridge. The AC bridges are very convenient and give the accurate result of the measurement. The construction of the bridges is very simple. The bridge has four arms, one AC supply source and the balance detector. It…

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