How-to Choose the Best Flow Meters

In these latest years the demand of fluids flow rate- Clean or slurry or viscous liquid (electrically
measuring has been more and more frequent inconductive or no)
industrial processing so as in the life of all days.- Specific gravity or density
To reduce consumptions and therefore expenses: in- Range flow rate
short to leave better.- Piping requirements
Often a higher accuracy in flow measurements- And so on
means to produce much better at lower prime costs.Specification sheets are designed from supplier to
Otherwise it may happen that lack or inaccuracy ofobtain the crital information necessary to match the
flow measurements can cause damages orcorrect flowmeter to the job of the customer.
disappointing results.Another important consideration for electrical
To select a flowmeter is therefore very important. Itcomponents in hazardous areas: the flowmeters must
is expert's opinion that over 75 percent of thebe offered in intrinsically safe.
flowmeters do not give satisfactory performances.All flowmeters require an initial calibration. Qualified
And improper selection accounts for 90 percent oftechnicians are available at the supplier to perform
these problems.calibrations for the specified conditions of customer.
The most important requirement is knowing exactlyA number of factors influence requirements of
what the instruments is supposed to do.maintenance of flowmeters. Insufficiently selected
Some questions to consider:devices invariably will cause problems at an early date.
- Repeatability of process controlFlowmeters with no moving parts usually will require
- Linearity - high accuracy of accounting or custodyless attention than unites with moving parts. If the
transferliquids is dirty or viscous, periodic internal inspections
- Local indication or remote signalare required in especially in flowmeters with moving
- On-Off or proportional outsparts.