Sunday 27 July 2014

Steam| Air Flow meters in India | Addmas



A Steam And Air Flow meters in India is a device for measuring, monitoring, or recording the rate of flow, pressure, or discharge of a liquid, as of a gas.

An Steam And Air Flow meter is a type of flow meters that measures the flows of a liquid, gas or steams by using the principle of ultrasound. The flow meter can measures the average velocity along the path of an emitted beam of ultrasound, by averaging the differences in measured transit time between the pulses of ultrasound propagating into and against the direction of the flows. Steam Flow meters are affected by the pressures, temperatures, density and viscosity of the flowing medium.

There are three different types of Steam flow meters. 

  1. Transmission Steam And Air Flow meter, which can be distinguished into In-line Steam And Air Flow meter and Non-Intrusive Steam flow meters.
  2. Reflection or Doppler Steam And Air Flow meter.
  3. Open-Channel Steam And Air Flow meter.
Steam And Air Flow meter such as In-line Flow meters are Multivariable Flow meters as it is used for the measurement of liquid, gas or steam in industrial applications for the water and wastewater treatment plant, chemical and petrochemical, oil and gas, power, pharmaceutical, paper, food and beverage industries.
Multivariable In-line Steam And Air Flow meter, are used for steam flow monitoring of most liquids, gases or steam. Multivariable In-line Steam And Air Flow meter   utilizes three primary sensing elements, a vortex shedding velocity sensor, a temperature sensors, and a pressure sensors to measure the Steam flow rate of liquids, gases or steam.

In-line Steam And Air Flow meters  operates in a following manner:
  • It measures flows of liquids, gas and steam by detecting the frequency at which vortices are alternatively shed from a bluff body.
  • As flows passes a bluff body in the Steam  flow stream, Air meter, the vortices create low and high pressure zones behind the bluff body, or shedder bar.
  • In-line Air Flow meters uses a piezoelectric crystal sensor to detect the pressures exerted by the vortices on the velocity sensor.
  • The piezoelectric crystal converts these "pulses" into electrical signals. The meters uses a sensor designed to create a robust sensor and to minimize potential leaks.

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