pressure Archives | Instrumentation and Control Engineering

What are various Pressure calibrators and how to use them?

1. What are pressure calibrators? Pressure calibrators are exact pressure measuring instruments that can verify and calibrate the pressure value of another pressure measuring device. Pressure calibrators include a deadweight tester, multifunction calibrator, or test gauge. These pressure calibrators provide a faster and easier way to calibrate and maintain pressure-measuring devices with high accuracy in …

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Errors Involved in Pressure Gauge Measurement

Pressure Measurement

What is an error in the pressure gauge? Inaccuracy in pressure gauge occurs when an output signal diverges from the desired value. When the pointer on the pressure gauge scale indicates a higher or lower value instead of actual. What are the factors affecting accuracy and performance in Pressure Gauges? The majority of pressure gauges …

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Choked Flow in Control Valve Applications

Control Valve

What is choked flow? The choked flow is a compressible flow effect.The choked flow is the dynamic condition of the fluid that is associated with the venturi effect.The fluid velocity will increase when the fluid at a given parameter flows through the constriction called convergent and divergent nozzle in a pipe or line into a lower pressure environment. …

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Various types of Pumps and its Application

Field Instrumentation

What is a Pump? A pump is a device that is used to transfer liquids, gases, or slurries. It enhances the fluid’s mechanical energy. The excess energy can be put to good use by increasing: Pressure Elevation Velocity To know more about Pump CLICK HERE Classification of Pumps: Pumps are classified into two …

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Control Valve Sizing For The Process Performance

Control Valve

What is control valve sizing? It is the process or the act of selecting an appropriate control valve for a particular application in the process industry. The control valve sizing is an essential factor to be considered while selecting the right sized control valve for the required process to achieve the highest degree of process …

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Overview of pressure measurement

Pressure Measurement

Pressure Transmitters Pressure is one of the most common properties to detect. We frequently sense differential pressure to determine fluid flow, liquid level, and equipment performance. Pressure transmitters can be designed to measure absolute pressure or gauge pressure. All sensors will sense pressure above atmospheric. Most, but not all, will measure pressure below atmospheric (a partial …

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What is McCLEOD GAUGE

Pressure Measurement

Introduction McCLEOD GAUGE is generally used as a primary standard for the measurement of high vacuum (low pressure) and is simple to use. It was invented in 1874 by Herbert McCleod. Principle McLeod gauges operate by taking in a sample volume of gas from a vacuum chamber, and then compressing it by tilting, and infilling …

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Electronic pressure measurement

Pressure Measurement

Introduction For electronic pressure measurement a sensor is required to detect the pressure and/or its change, and to convert it accurately and repeatably into an electrical signal utilising a physical operating principle. The electrical signal is then a measure of the magnitude of the applied pressure or change in pressure. Four key measuring principles and …

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What are capillary lines? and what is it used for?

Pressure Measurement

Introduction Capillary lines are utilized when instruments need to be removed from direct contact with the installation point due to elevated process temperature, pressure spikes or design specifications. Added between the measuring instrument and diaphragm seal, it protects from damage and/or accuracy degradation with slow heat transfer rate and dead-ended process fluid providing further protection When a gauge …

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Working of Pneumatic differential pressure transmitters

Instrumentation, Pressure Measurement

Introduction Pneumatic differential pressure transmitters are designed for measuring the pressure, differential pressure or level of liquids, steam, gas or air. The measured value is transmitted as 3 to 15 psi pneumatic signal to remotely mounted receiving equipment such as recorders, indicators or controllers or combinations of these items. Principle of operation The system is depicted …

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