Rotameter digital, also known as variable
area flow meter is a device that measures flow rates of different fluids within
a wide operable range of high temperatures and pressure. This VA flow meter is
specified for use in hazardous environments. It provides precise measurements, especially
for corrosive liquids or low flow measurement.
Working principle
Digital metal tube rotameter
works on a variable area principle. The design of this flow sensor is
a simple one and consists of a tapered metallic tube. PTFE lined stainless steel,
or stainless steel can be the constituent elements of this tube. The center of
the tube consists of a piston or float. As the fluid flows, the pressure causes
a variation in the position of the float. This float normally rests at the
bottom of the tube when no flow is present due to gravitational attraction.
Therefore the intensity of fluid flow causes the float to move upwards
accordingly. This varied area of a float is detected by the digital flow sensor
and the flow rate is measured.
Features
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Electronic rotameter indicator to show flow
rate and total flow
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Digital metal tube rotameter has 4-20Ma
output for various process controls
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Metallic tube rotameter comes with
different power supply, such as battery, 24VDC or 220VAC
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Digital VA flow meter also option with HART
or MODBUS
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Simple design with easy installation system
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Its resistance to corrosion and abrasion
lowers the requirement of maintenance.
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Different configurations ranging from
bottom to top and top to bottom or horizontal
rotameter are possible.
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High temperature and pressure do not affect
the accuracy of the measurement. The metal tube can withstand higher temperatures
than other glass and plastic tube meters.
Rotameter digital Applications
Its commercial application includes a wide
range of industries using Rotameter for various tasks. These applications
involve the following functions served in different industries.
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1- Air conditioning industry measuring，used as hot and cold water flow meter.
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2- General process industries for measuring
medium to large volumes of fluid.
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3- Water treatment plants
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4- Purge fluid metering in different
industries.
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5- Pharmaceutical and food processing
industries for detecting the flow of steam, gas and other liquids.
