Omega Products FSW531 User Manual
LIQUID MICRO-FLOW SWITCHES
FSW530 Series
Starts at
$
300
⻬ Economical
⻬ Extremely Low Flow
⻬ Pelton-Type
Microturbine
⻬ Plastic or Metal
Housing
⻬ High/Low Alarms
The FSW530 Series flow switches
are capable of detecting extremely
low liquid flow rates from 13 mL/
minute up to 10 L/minute with a full
scale switch accuracy of ±1.0% or
better! A wide variety of fluids may
be measured. Repeatable results
are achieved using a patented
pelton-type microturbine wheel.
This proven design has a well
deserved reputation for continuous
operational service for many years
without failure. Because of the
compact size and economical cost
of these products, the FSW530
models are suitable for a wide
variety of industrial, commercial,
laboratory and OEM applications.
Some sample applications include
high/low alarms for hydrocarbon
fluids, fuels, light oils, solvents,
coolant, pesticides, mild acids,
alkalis, and de-ionized water. Either
plastic or metal construction may
be selected.
SPECIFICATIONS
Accuracy: ±1% FS
Repeatability: ±0.5% FS
Recommended Liquids: Low viscosity
(<10 cS), translucent or transparent
chemically compatible with a minimal
amount of entrained air
Fittings: Acetal or stainless steel
O-rings: FKM, EPDM (optional)
Power: 12 to 24 Vdc @ 40 mA
(plus load)
Maximum Pressure:
Acetal: 6.9 bar (100 psig)
Stainless Steel: 34.5 bar (500 psig)
Enclosure: NEMA 1 (IP10)
Recommended Filtration:
25 microns or less
Relay: FET switch 24 Vdc, 250 mA
FSW531-S, $420,
both shown
actual size.
Response Time:
<1 second at 97% of final value
Switching Hysteresis:
±2.0% full scale
Dimensions: 60 x 55 x 90 mm
(2.4 x 2.2 x 3.5")
Temperature:
Operation: 5 to 55°C (41 to 131°F)
Storage: 0 to 70°C (32 to 158°F)
Temperature Sensitivity: ±0.2% FS
or less per °C
Wetted Materials: Ryton or 316 SS,
epoxy, glass, sapphire and FKM or
EPDM (optional)
MOST POPULAR
MODELS HIGHLIGHTED!
To Order (Specify Model Number)
Model No. Price Description
3
1
⁄
8
1
⁄
4
1
⁄
4
3
") fitting
⁄
8
3
") fitting
⁄
8
1
") fitting
⁄
8
1
") fitting
⁄
4
1
") fitting
⁄
4
1
⁄
1
⁄
3
") fitting
⁄
8
") fitting
⁄
8
") fitting
") fitting
") fitting
1
") fitting
⁄
4
1
") fitting
⁄
4
") fitting
4
") fitting
4
FSW531 $300 Acetal flow switch 20 to 100 mL/min, 3.18 mm (
FSW532 300 Acetal flow switch 30 to 200 mL/min, 6.35 mm (
FSW533 300 Acetal flow switch 60 to 500 mL/min, 6.35 mm (
FSW534 300 Acetal flow switch 120 to 1000 mL/min, 6.35 mm (
FSW535 300 Acetal flow switch 300 to 2000 mL/min, 6.35 mm (
FSW536 360 Acetal flow switch 0.6 to 5.0 L/min, 9.53 mm (
FSW537 385 Acetal flow switch 1.1 to 10 L/min, 9.53 mm (
FSW531-S 420 SS flow switch 20 to 100 mL/min, 3.18 mm (
FSW532-S 420 SS flow switch 30 to 200 mL/min, 6.35 mm (
FSW533-S 420 SS flow switch 60 to 500 mL/min, 6.35 mm (
FSW534-S 420 SS flow switch 120 to 1000 mL/min, 6.35 mm (
FSW535-S 420 SS flow switch 300 to 2000 mL/min, 6.35 mm (
FSW536-S 480 SS flow switch 0.6 to 5.0 L/min, 9.53 mm (
FSW537-S 525 SS flow switch 1.1 to 10 L/min, 9.53 mm (
Comes complete with operator’s manual.
For models with EPDM O-rings add suffix “-EPDM” to the model number and $50 to price.
Ordering Examples: FSW531, acetal liquid flow switch 20 to 100 mL/min and PSS-12,
12 Vdc power supply, $300 + 190 = $490.
FSW533-S, SS liquid flow switch, 60 to 500 mL/min and PSS-12, 12 Vdc power supply,
$420 + 190 = $610.
For more information on PSS-12 visit omega.com/pss-5a
B-74
B
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