®
Technical Specifications
FLM
®
INSTRUMENTS, LLC.
Product Data Sheet
PDS-FLM
2026-07-31
Vortex Eggs Delta
Flowmeter
Liquid, Gas and Air
Description
The unique sensor body and Totalizer
design makes Eggs Delta one of the most
compact, light weight vortex meters in the
industry. The injection molded design
provides a smooth surface for cleanliness
and better chemical compatibility. It is an
ideal measurement and monitoring device
for most gases, liquids and air applications.
Principle of Operation
Sparling Vortex Meters measure flow rate
based on Karman's vortex shedding
principle. The stationary trapezoidal object
(bluff body) placed into the path of the
flow stream sheds vortices downstream at
a frequency proportional to the velocity of
flowing media. A piezoelectric sensor
detects the vortices and creates electrical
impulse signals which is proportional to the
fluid flow rate.
Applications
The simple unique construction without
any moving parts enables EggsDelta to
measure liquid, air and gas flow
measurements with very little head loss.
Common Applications Include:
•
Deionized Water(RO/DI skids)
•
Ultra pure water distribution in
medicare, biotech, semiconductor
and pharmaceutical market
segment
•
Cooling Water
•
Chemical Feed
•
Alcohol
•
Air consumption control in
compressed air distribution
systems
•
Gas flow (nitrogen, oxygen, argon,
etc) measurements and monitoring
•
Sanitary Cleaning
®
INSTRUMENTS, LLC.
Features
•
Sizes include: 0.125", 0.25", 0.5" and 1"
•
Injection molded plastic construction
•
Single molded one-piece meter and bluff body
construction with no moving parts.
•
NEMA 4X Enclosure
•
Optional Scaled Pulse Outputs or 4-20mA Output with
external power
•
Each unit is battery powered, which eiminates tthe
need of an external power source and saves wiring and
installation cost. The meter wil provide a low battery
display in case meter needs battery replacement.
•
Unique coupling design alllows "Free Positioning" of the
transmitter for eaase of reading regardless of meter
body orientation.
•
Built in EEPROM stores meter parameters and totalizer
reading
•
Two separate totalizers with one reset switch keeps the
count of individual readings. Two separate indicators
display the flow rates in GPM and GPH as required.
How to order an FLM
Table 1: BaseModelNumber
FLM
-
Eggs Delta
Table 2: ApplicableFluids
2
-
Liquid
3
-
Gas
Table 3: Size
S
-
0.125"
0
-
0.25"
1
-
0.5"
2
-
1"
Table 4: Indicator
1
-
with indicator/totalizer
Table 5: Output
0
-
None
1
-
Pulse Output
2
-
4-20mA
Table 6: Construction
W
-
Integral NEMA 4X encl.
Table 7: Accessories
NPT Threaded Adapters (PVC)
NPT Threaded Adapters (PPS)
Model
Fluids
Size
Indic.
Output
Const
FLM
2
S
1
0
W
Standard Specifications
Accuracy:
0.5" - 1": ±1% of flow (Liquid Only)
±3% Full Scale
Repeatability:
±0.5% of full scale
Outputs:
4-20mA: True two wire requiring external power
supply - 12-45VDC
Scaled Pulse Outputs:
Three wire system requiring external power
supply.
Pulse Width 30 ms.
Max. Current 20mA.
Max. Voltage Impressed 30V.
External Power
Supply:
12-45VDC required for 4-20mA or Scaled Pulse
Outputs
Display:
•
8 digit totalizer with two separate 4
digit indicators showing flow rate per
hour and minute
•
7 digit reset totalizer
Enclosures:
NEMA 4X
Process Temp:
-4°F to 176°F
Max. Working
Pressure:
150 psi
Flow Ranges:
See Table
Pressure Loss:
Water:
•
0.05-4.56 psi (0.125")
•
0.018-5.04 psi (0.25" - 1")
Air:
•
0.02-0.103 psi (0.125")
•
0.009-0.22 psi (0.25" - 1")
Construction
Material:
PPS (Polyphenylene Sulphide)
Ambient Temp:
-4°F to 140°F
Power:
Battery (3.6V lithium) powered if no output
(other than display of rate or totalizer) is
required (four years of life at room temperature,
also provide power reduction alarm)
Process
Connections:
NPT Threaded Adapters
R 3/8 - 19
.........
0.125" NPT Female
R 1/2 - 14
.........
0.25" NPT Female
R 3/4 - 14
.........
0.5" NPT Female
R1 1/4 - 11
.......
1" NPT Female
®
INSTRUMENTS, LLC.
Flow Ranges
Liquid (GPM)
Size (in)
Model #
Indicator
Flow Rate
(GPM)
Totalizer
(gallons)
Min. Flow
(4mA)
Max. Flow
(20mA)
0.125
FLM2S
x 0.0100
x 0.0100
0.105
1.05
0.250
FLM20
x 0.0100
x 0.0100
0.310
3.96
0.500
FLM21
x 0.100
x 0.100
0.750
11.4
1.00
FLM22
x 1.00
x 1.00
2.20
35.1
Above table is based on water measurements at 70°F
Gas (scfm)
Size (in)
Model #
Indicator
Flow Rate
(scfm)
Totalizer
(scf)
Min. Flow
(4mA)
Max. Flow
(20mA)
0.125
FLM3S
x 0.0100
x 0.00100
0.254
0.590
0.250
FLM30
x 0.100
x 0.0100
0.650
3.18
0.500
FLM31
x 1.00
x 0.100
1.94
8.99
1.00
FLM32
x 1.00
x 1.00
5.90
30.2
Above table is based on air measurements at 68°F and atmospheric pressure
(14.7 psi)
Flow range may vary under different process conditions such as density and
viscosity of the process fluid.
Size (in)
Meter
I.D. (in)
L (in)
W (in)
H1 (in)
H2 (in)
*L (in)
H (in)
0.125
0.157
3.15
1.26
4.02
5.12
0.570
1.14
0.250
0.315
3.15
1.26
4.02
5.12
0.570
1.14
0.500
0.551
3.35
1.26
4.02
5.12
0.570
1.14
1.00
0.965
4.72
1.81
4.69
7.48
0.906
1.81
*L = with adapters
