
MULTIPLE TUBE
ROTAMETERS
FL-2AA Series
Starts at
B
$
342
Complete Assemblies
†
Optional
⻬ High Accuracy, ±2% FS 
⻬ Variety of Flow
Configurations
⻬ Interchangeable 150 mm 
Flow Tubes
⻬ Scales Designed to
Minimize Parallax and 
Eye Fatigue
⻬ Available with High
Precision Valves
⻬ Panel Locking Nuts
Included
To Order (Specify Model Number)
For Two Tubes – 249.25 H x 57.15 mm W (9.813 x 2.25") 
OMEGA’s multi-tube rotameters are 
convenient for applications where 
up to six streams of liquids or gases 
are to be metered in individual 
channels. Flow pattern B represents 
multiple inlets manifolded into one 
outlet (see diagram). To obtain one 
inlet split off into multiple outlets, 
flow pattern B can be turned upside 
down and the flow tubes inverted in 
the field. The rotameter end fittings 
can be supplied in aluminum or 
316 SS. Precision metering valves 
with 16 turn non-rising stems are 
also available (consult Sales).
SPECIFICATIONS
Repeatability: ±0.25% FS 
Max Pressure: 13.8 bar (200 psig)  
Max Temperature: 121°C (250°F) 
82°C (180°F) for water
Connections: 
Please visit omega.com/fl3600 for 
additional dimensional information.
1
/
8 FNPT
Model No. Frame Price Frame Flow Pattern End Fittings
FL-2AA-(*)-(*) $202 A Aluminum 
FL-2SA-(*)-(*) 437 A 316 SS 
FL-2AB-(*)-(*) 227 B Aluminum 
FL-2SB-(*)-(*) 462 B 316 SS 
For Three Tubes – 249.25 H x 82.55 mm W (9.831 x 3.25") 
FL-3AA-(*)-(*)-(*) $266 A Aluminum 
FL-3SA-(*)-(*)-(*) 635 A 316 SS 
FL-3AB-(*)-(*)-(*) 297 B Aluminum 
FL-3SB-(*)-(*)-(*) 666 B 316 SS 
For Four Tubes – 249.25 H x 107.95 mm W (9.813 x 4.25") 
FL-4AA-(*)-(*)-(*)-(*) $349 A Aluminum 
FL-4SA-(*)-(*)-(*)-(*) 838 A 316 SS 
FL-4AB-(*)-(*)-(*)-(*) 387 B Aluminum 
FL-4SB-(*)-(*)-(*)-(*) 876 B 316 SS
Comes complete with air and water correlation sheet for each tube. 
Delivery time depends on configuration.
Select the desired 150 mm flow tube from those listed on page B-34. Delete the 
* 
FLT-prefix and insert the remaining suffix from the flow tube into the model numbers above. 
Add the price of the flow tubes to the price of the frame.
† For NIST calibration, add suffix “-NIST AIR” to model number and $225 per tube, per gas,
per float to the price. Add suffix “-NIST WATER” to model number and $275 per tube to the price. 
Ordering Example: FL-3SA-45G-61G-61C calls out a three tube meter with 316 SS end
fittings, independent inlets and outlets with the FLT-45G, FLT-61G and FLT-61C 150 mm flow 
tubes installed in the unit, $635 + 70 + 70 + 70 = $845. 
B-32
Shown smaller
than actual size.
CUSTOM BUILT TO ORDER!

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