Thursday 29 July, 2010
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Comparison with rotameters

MASS-VIEW® is the digital high-tech alternative to the VA meter, rotameter or purgemeter.

For many industrial processes and chemical plants, Bronkhorst’s MASS-VIEW® eliminates the relative inaccuracy of VA meters, the need to recalibrate for different gases and the safety risk of ruptured glass tubes, at a price directly comparable with the cost of a variable area meter and separate transmitter. For OEMs, it offers the option of incorporating more modern, aesthetic gas flow measuring instruments into their equipment, presenting a more appropriate, high technology image.

The basic advantages of the VA meter are its relatively low cost, reasonable accuracy, simplicity of design, low maintenance and ease of installation. However, one drawback is that flowmeter accuracy degrades when fluid temperatures and pressures fluctuate, whilst there is also a problem of parallax error when taking readings from different viewpoints. In addition, glass and plastic tubes often break in usage, leading to the risk of potentially dangerous gases leaking from the instrument; to compensate, metal tubes and magnetic float sensing are sometimes used instead, but such designs are comparatively expensive, typically double the price.

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MASS-VIEW® versus Rotameter

   MASS-VIEW®  Rotameter
 

MASS-VIEW®

Rotameter

Display Digital OLED display, easy direct or relative reading of actual flow Visual check on glass  could lead to parallax errors
Mounting orientation
Any
Vertical
Measured flow
Mass flow
Volume flow
Insensitive for temperature and pressure variations
YES NO
Flow path Aluminium Glass or plastic
Output signal
0-5V and RS-232 and Modbus-RTU No signal
Alarms
Standard available with 2 relays
Separate transmitter needed
Media
Standard 7 gases available One gas or one liquid
Accumulated flow rate display
Standard totaliser available in several units readable
Not displayable
Rangeability
1:100, 4 pre-installed full scale ranges  1:10, one full scale range

 

Your Distributor

United States Bronkhorst USA Inc
57 So. Commerce Way Suite 120
PA 18017 Bethlehem
USA
T: +1 610 866 6750
F: +1 610 866 9212
sales@bronkhorstusa.com

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