Product category:
Gas and Steam Flow Measurement
News Release from: Influx Measurements | Subject: Reflux
Edited by the Processingtalk Editorial
Team on 27 May 2003
Glass tube VA flowmeters go electronic
Flow meters for laboratory and industrial applications use glass tube variable area measurement techniques to monitor sample gas effluent flows
Influx Measurements have modernised the conventional "Variable area" glass tube flowmeter technique by applying a programmable position measurement device which senses the "float" position, and converts this to a linear analogue flow-rate output suitable for control or data logging The Reflux is the ideal solution to flow-rate applications requiring a low pressure drop flow transmitter that also provides direct visual flow rate indication
This article was originally published on Processingtalk on 1 Aug 2003 at 8.00am (UK)
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Recording small gas flows
Combining the advantages of direct reading variable area flow-meters applied to very small air sample flows, even as low as 100 to 1000 cc/min, the Reflux flow analogue transmitter is now available
Extended flow range glass VA flowmeters
Glass tube variable area flowmeters are now available in three tube lengths - long, standard and compact - from Influx Measurements of Winchester
Meter makes the most of low-pressure flows
Influx Measurements has solved the design problem of achieving economical flow measurement for low-pressure gases, typically met on methane or sour gas monitoring from digesters
The Reflux is also available as an intrinsically safe unit.
A recent application used 16 Reflux meters in order to monitor sample gas flows in factory effluent monitoring systems.
In this application it was essential to record sample flow-rates and compare these with the main stack outflow, and to provide auditable recording to meet regulatory requirements.
In this case the effluents were being monitored for radioactive alpha and beta particles in the extracted sample stream, and thereby assessing the efficiency of filtration separation systems.
The project manager for the radiation monitoring systems installed identified major advantages in this technique: "The Reflux meters are cost effective and highly reliable - only imposing their low pressure drop of less than 4 mbar on the sample flow.
They are simple to install and need no special pipework: we even build in a second metering position for the inspectors to install their own check meter.
The analogue output is fed to our totaliser, to show the total sample volume extracted.
The Reflux provides 2% accuracy and gives an immediate visual check on system operation.
This combines with a lower cost than alternative systems, and the Reflux has played an important part in the success of such effluent monitoring systems".
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