Difference Between Current & Potential Transformer

The differences between Current Transformer (CT) and Potential Transformer (PT) are given below: S.No. Current Transformer (CT) Potential Transformer (PT) 1. It is connected in series with the power circuit. It is connected in parallel with the power circuit. 2. Its secondary is connected to an Ammeter. Its secondary is connected to a Voltmeter. 3. Its secondary … Read moreDifference Between Current & Potential Transformer

Measurement Systems | Functions & Applications

The measurement of a given quantity is essentially an act or result of comparison between a quantity, whose magnitude (amount) is unknown with a similar quantity whose magnitude (amount) is known, the latter being called standard. Measurement involves the use of the instrument as a physical means of determining quantities or variables. The instruments serve … Read moreMeasurement Systems | Functions & Applications

Static Sensitivity, Linearity and Hysteresis

Static Sensitivity Static Sensitivity of an instrument or an instrumentation system is defined as the ratio of the magnitude of the output signal or response to the magnitude of an input signal or the quantity being measured. The reciprocal of sensitivity is defined as inverse sensitivity or deflection factor. The sensitivity of an instrument should … Read moreStatic Sensitivity, Linearity and Hysteresis

Linear Variable Differential Transformer (LVDT) | Advantages & Applications

Fig: LVDT cross-section (source: te.com )   Linear Variable Differential Transformer (LVDT) is an inductive transducer that we discussed in the previous article. It is basically used to translate linear motion into electrical signals. LVDT Construction LVDT consists of one primary winding and two secondary windings. All these windings are wound on a cylindrical former. … Read moreLinear Variable Differential Transformer (LVDT) | Advantages & Applications

Potentiometer transducer | Advantages & Applications

Fig. Resistive Potentiometers (POT) (source: instructables.com) Potentiometer  A potentiometer consists of a resistive element having a sliding contact. This sliding contact is known as a wiper. A potentiometer is also called as POT because it is used in voltage division. It is a resistive and passive transducer.   Depending upon the motion of wiper, potentiometer are … Read morePotentiometer transducer | Advantages & Applications

Strain Gauge Working Principle & Applications

Fig. Strain Gauges (source: omega.com)   Strain gauge A strain gauge is an electrical transducer which is used for measuring mechanical surface strain. Basic Principle of Strain Gauge When stress is applied to the metal conductor, its resistance changes owing to change in length and cross-sectional area of the conductor. The resistance of the conductor under … Read moreStrain Gauge Working Principle & Applications

Thermocouple Working | Advantages & Applications

Fig. Thermocouple (source: sterlingsensors.co.uk)   What is a Thermocouple? A thermocouple consists of a pair of dissimilar wires joined at one end. It is an active transducer. On the other hand, RTD and thermistors are passive transducers. Thermocouple work on the principle of Seebeck effect. According to Seebeck effect, if two dissimilar metals are joined together … Read moreThermocouple Working | Advantages & Applications

Piezoelectric Transducer | Advantages & Applications

Piezoelectric Transducer A piezoelectric transducer is one that can generate a voltage proportional to the stress applied to it. These transducers work according to the piezoelectric effect. When a mechanical force or pressure is applied across the piezoelectric crystal, an electric potential appears across the surfaces of crystal. This generation of electric potential is due … Read morePiezoelectric Transducer | Advantages & Applications

Hall Effect Transducers | Advantages & Applications

Hall Effect Transducers Hall Effect Transducers are the transducers which work on the principle of hall effect. According to hall effect, if a conducting material strip carries current in the presence of a transverse magnetic field; an EMF is produced between two edges of the conductor in a direction perpendicular to both the magnetic field … Read moreHall Effect Transducers | Advantages & Applications

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