Measurement

Inductive transducer

“Inductive transducer is also called as Variable Inductance transducer. When a physical quantity to be measured, such as motion, displacement, vibration, acceleration, force, speed etc. make changes in inductance properties of the sensor coil, or magnetic properties of core material or electric properties of magnetic circuits, these sensors or transducers are termed as inductive/ magnetic …

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Capacitive Transducer

Capacitive transducer is also called as Variable capacitance transducer. When a physical quantity such as temperature, pressure, displacement, vibration, force etc. make changes in capacitance or relative capacitance for the sensor, these sensors are termed as capacitive sensor or variable capacitance transducers. Read more about Capacitance in wikipedia Working principle of capacitive transducer- Since we …

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Resistive transducer

Resistive transducer is also called as Variable resistance transducer. Resistive transducers are those devices in which resistance varies due to effect of physical quantity to be measured. When a physical quantity such as temperature, pressure, displacement, vibration, force etc. make changes in resistance or resistivity of the sensor material, these sensors are termed as resistive …

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Passive Transducers

“Passive Transducers are the transducers which require external power for the measurement of process variable or or processing of output from primary sensing element (Sensor). These are also known as externally powered transducers. However these transducers and circuitry may absorb some energy during measurement and detection of change in process variable.” A block diagram for …

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Active Transducers

“Active transducers are the transducers which do not use any external power for the measurement of process variable. These transducers are self generating devices which operate under the energy conversion principle. In other words, active transducer produces its own equivalent electrical output in response to the physical quantity to be measured.” Transducer (Wikipedia link) A …

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Types of transducers

Types of Transducers are having a major role to understand the transducers structure, working, analyzing its output and different conversion and manipulating techniques etc.   A broad classification of transducers are given as follows- Types of transducers based on Source of Energy requirement- Active Transducer Passive Transducer Types of transducers based on physical phenomenon- Primary Transducer Secondary Transducer …

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Electrical Transducer

“Electrical Transducer is specified as the sensing device which is used to detect or sense a non electrical physical quantity or magnitude and convert into electrical output signal such as voltage or current proportional to the input being measured.” The physical quantities are basically non electrical in nature so to detect/ measure, control, store the …

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Transducer

“Transducer is a device which converts one form of energy into another form for the purpose of measurement and control.” Most of the transducers are based on converting physical quantities such as pressure, force, temperature, liquid level, fluid flow etc. into a measurable or detectable change for measurement and control the particular physical variable. A …

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Thermopile

“Thermopile is used to measure temperature difference. it convert thermal energy into electrical energy. it uses several thermocouples connected in series or parallel. Thermopiles are used for contact-less temperature sensing. The function of a thermopile is to transfer the heat radiation emitted from the object to a electrical voltage output. The output is in the …

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Interface level measurement using Differential Pressure Transmitter (DPT)

Interface level measurement is used to monitor the level of two liquids with different specific gravity values. When two different liquids are contained within the same tank, but are unable to mix with each other, an emulsion layer forms and creates a barrier between the two liquids. When two insoluble materials mix, the liquid with …

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