The OMEGA® precision variablearea
rotameters can measure flows
of air, water, and gases, with up to
±2% FS accuracy and 0.25% FS
repeatability (models ending in "07" or "45" have ±5% FS accuracy). These units feature an
easy-to-read millimeter scale and
come with correlation charts for air
and water. The scale is fused on the metering
tube in 1 mm (3/32") increments,
which enables a user to read the
flow rate with the highest accuracy.
The scale design, in which a vertical
line runs through the length of the
scale and intersects the horizontal
scale divisions, reduces parallax
and eye fatigue, thus ensuring highaccuracy
readings (see inset, next
page). The front polycarbonate resin shield is
also curved to act as a magnifying
glass, which yields superior
performance over other rotameters
with standard designs. Non-Rising Stem Needle Valve
The 150 mm size flowmeters are
also available with a non-rising stem
type needle valve for special
applications. This 15-turn metering
valve has superior flow-rate control,
and is particularly suited to use in
chromatography applications. The
sliding tapered-needle mechanism
virtually eliminates sticking or
buildup due to foreign matter in the
fluid stream, without variations or
saw-toothing of the flow rate. Shielded for Pressurized Systems
These rotameters, with precisionbored
borosilicate glass metering
tubes, are fully shielded against
breakage. A white opaque rear
shield provides a background to aid
in discerning the float position. Panel Mounting Design
These rotameters are equipped with
horizontal ports and NPT threads for
easy panel mounting. The ports
have external threads and are
equipped with panel retaining nuts.
No additional mounting hardware is
required. Simply drill 2 holes
131 mm (5.156") apart (center to
center) for 65 mm units, 240 mm
(9.469") apart (center to center) for
150 mm units. Each hole should be
16 mm (5/8") in diameter.
† All dollar amounts on this site are shown in US currency.
Note: G suffix denotes glass float, ST suffix denotes 316 SS float, C suffix denotes carbaloy float, SA suffix denotes red sapphire float.
Comes complete with correlation tables (one each for air and water) on the back of the instruction sheet.
For units without valves add suffix "-NV" to model number; subtract $10 from price for aluminum; subtract $13 from price for SS.
For 16 turn high-resolution non-rising stem valve for 150mm rotameters add "-HRV" to model number; add $57 for aluminum; add $116 for SS.
For a NIST traceable certificate for air, add suffix "-NISTAIR" to model number; add $225 to price.
For a NIST traceable certificate for water, add suffix "-NISTWATER" to model number; add $275 to price.
Models ending in "07" or "45" have ±5% FS accuracy.
†Revised flow rate values effective on purchases after January 14, 2013.
