|
Rotameter calibration is
sometimes an overlooked issue by the companies that utilize them. Although a rotameter has
limited moving parts, they do perform a measurement for flow accuracy
and therefore should be included in your yearly calibrations. There are a few different types of rotometer available today,
although different in appearance, they all do basically the same job
just differently. Rotameter calibration should become a standard part of
your Q/A manual process.
Rotameters are a gauge that consists of a graduated glass tube
containing a free float for measuring the flow of a fluid or gas. They
are an item that many labs and manufacturers that utilize
water flow or air flow will recognize, but often overlook. Usually a
rotameter will have a
tube that holds a pellet or cylinder that will move up the scale
according to the pressure from the gases or liquids it is measuring.
Being a precision instrument, a rotometer needs calibration
yearly. Glass flowmeters are suitable for metering carrier gases, liquid and gas measurement in pilot plants, laboratories, process flow and level indicating.
Some units are equipped with a needle valve for flow rate control. High precision metering valves with non-rising stems are available for high sensitivity control and resolution
and are particularly suited for very low flow rates.
Slotted Tube Rotameters - This unit uses a slotted cylinder
and piston rather than a tapered tube. This piston portion of the meter
float travels within the cylinder, the piston acting as the fourth side
of the slot. As with standard tapered tube meters, the fluid flow raises
the piston until sufficient slot area is exposed to bring about your
final measurement.
Vane type Rotameters and Piston type Rotameters - Another type of
flowmeter that has a tapered interior chamber that allows a fitted piece
to raise or lower into the unit to measure flow.
During its use, a rotameter will accumulate foreign material inside
and will eventually lose its sensitivity to measurement. In many cases,
a yearly rotometer calibration will keep your measurements accurate and
save you time and money in maintenance. Graftel's, calibration lab has
calibrated Rotameters from dozens of manufacturers, and we have
established yearly rotometer calibration schedules with many of our
clients. listed below are several that we have calibrated to NIST
accuracy and ISO 17025.
As for services, Graftel can have your
liquid or gas Rotameter calibrated and
returned to you in 5 business days or less! Graftel also offers ISO
17025 Gas-flow calibrations for your rotometer that are NIST
traceable. For more information about our ISO 17025 calibration
capabilities, feel free to read our certificate
and scope or contact us with your
questions.
-
Dwyer Instruments VA Series Rotometers
-
Omega Instruments FL Series Rotometers
-
Universal Flow Instrument Rotameters
-
Brooks Instrument Rotameters
-
Meter Equipment Manufacturing Rotameters
-
Cole Parmer Rotameters
-
King
Instruments Rotometers
-
Blue-White
Rotometers
-
Kytola
Rotometers
Contact Us
today if you have
a rotameter that needs a NIST traceable ISO 17025 calibration.
|
