Turbine Flow Meter Working Principle: Turbine Flow Meter Working Principle – The Turbine Flow Meter is used for the measurement of liquid gas and gases of very low flow rate. It works on the principle of turbine. It consists of a multibladed rotor (called turbine wheel) which is mounted 90° to the axis of the […]
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Magnetic Flow Meters: Magnetic Flow Meters are the first type of flowmeters to be considered for high corrosive applications and for applications involving measurement of erosive slurries. These meters work on the principle of Faraday’s law of electromagnetic induction, which states that whenever a conductor moves through a magnetic field of given field strength, a
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Flow Measurement (Mechanical Transducers): The measurement of flow rate and quantity is the oldest of all measurements of process variables in the field of instrumentation. It is used to determine the amount of materials flowing in or out of a process. Without flow measurement, plant material balancing, quality control and the operation of any continuous
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Pyrometer Working Principle: When temperature being measured is very high and physical contact with the medium to be measured is impossible or impractical, optical pyrometer based on the principle of thermal radiation are used. These Types of Pyrometer Working Principle are used under condition where corrosive vapours or liquids would destroy thermocouples, resistance thermometer and
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Thermocouple Connection: One of the most commonly used methods of measurement of moderately high temperature is the thermocouple effect. When a pair of wires made up of different metals is joined together at one end, a temperature difference between the two ends of the wire produces a voltage between the two wires of Thermocouple Connection
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Platinum Resistance Thermometer: Platinum Resistance Thermometer – The resistance of a conductor changes when its temperature is changed. This property is used for measurement of temperature. The Resistance Thermometer uses the change in electrical resistance of conductor to determine the temperature. The requirements of a conductor material to be used in these thermometers are: The
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Resistance Temperature Detector (RTD): Resistance Temperature Detector (RTD) commonly use platinum, nickel or any resistance wire whose resistance varies with temperature and which has a high intrinsic accuracy. They are available in many configuration and sizes; as shielded or open units for both immersion and surface applications. The relationship between temperature and resistance of conductors
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What is a Temperature Transducer?: Temperature Transducer is one of the most widely measured and controlled variable in industry, as a lot of products during manufacturing requires controlled temperature at various stages of processing. A wide variety of Temperature Transducer and temperature measurement systems have been developed for different applications requirements. Most of the Temperature
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Photoelectric Transducer Working Principle: Photoelectric Transducer can be categorized as photo emissive, photo-conductive or photo-voltaic. In photo emissive devices, radiation falling on a cathode causes electrons to be emitted from the cathode surface. In photo conductive devices, the resistance of a material is changed when it is illuminated. Photo voltaic cells generate an output voltage
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Working Principle of Piezoelectric Transducer: A symmetrical crystalline materials such as Quartz, Rochelle salt and Barium titanate produce an emf when they are placed under stress. This property is used in the Working Principle of Piezoelectric Transducer, where a crystal is placed between a solid base and the force-summing member, as shown in Fig. 13.31.
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