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Flow Switches

No moving parts, not susceptible to contamination and can be oriented in any pipe configuration...
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MINI BRASS FLOW SWITCH

Measuring only 25 x 70 mm (1 x 2¾'), these FSW-130 Series compact switches are ideal for use where space is at a premium. Designed for use with water and oil, these switches a... Read More

FSW-130
Product Number Media Type Flow Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Wire Length Features
FSW-131
$116.28
6  In Stock
Water, Oil
0 to 2 GPM
±15%
1,000 psi
93 °C (200 °F)
NPT Female
1/4"
Brass, 316 SS
20 VA SPST
24"
0.10 GPM Switch Point
FSW-136
$116.28
Available
in 8 weeks
Water, Oil
0 to 2 GPM
±15%
1,000 psi
93 °C (200 °F)
NPT Female
1/4"
Brass, 316 SS
20 VA SPST
24"
1.50 GPM Switch Point
FSW-133
$116.28
Available
in 4 weeks
Water, Oil
0 to 2 GPM
±15%
1,000 psi
93 °C (200 °F)
NPT Female
1/4"
Brass, 316 SS
20 VA SPST
24"
0.50 GPM Switch Point
FSW-132
$116.28
Available
in 5 weeks
Water, Oil
0 to 2 GPM
±15%
1,000 psi
93 °C (200 °F)
NPT Female
1/4"
Brass, 316 SS
20 VA SPST
24"
0.25 GPM Switch Point
FSW-134
$116.28
Available
in 5 weeks
Water, Oil
0 to 2 GPM
±15%
1,000 psi
93 °C (200 °F)
NPT Female
1/4"
Brass, 316 SS
20 VA SPST
24"
0.75 GPM Switch Point
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Thermal Dispersion Flow Switches for Liquids

OMEGA™ FST-200 Series flow switches use thermal dispersion technology to create a very accurate and economical method of sensing flow. Monitor fluids from 0.4 to 1.2 specific grav... Read More

FST200
Product Number Media Type Velocity Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Supply Power Wire Length Features
FST-211-SPST
$219.39
2  In Stock
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
3/4" to 1 1/2"
PP, PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-221-SPST
$229.69
7  In Stock
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
2" to 12"
PP, PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-212-SPST
$360.50
Available
in 6 weeks
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
3/4" to 1 1/2"
PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-222-SPST
$370.80
Available
in 6 weeks
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
2" to 12"
PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
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Paddle Flow Switch

The OMEGA™ FSW-160 is the newest heavy-duty line of flow switches. The switch is used to signal, start, or stop electronically operated equipment when flow or no-flow conditions oc... Read More

FSW-160-Series
Product Number Media Type Flow Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Supply Power
FSW-160
$136.24
5  In Stock
Liquid
4 to 500 GPM
±1%
200 psi
121 °C (250 ˚F)
NPT Male
1"
316 SS, 304 SS, Brass, EPDM
15 A SPDT
125 or 250 Vac
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Flow Switch With Compact Relay Controller

This switch package offers a complete solution for flow or no-flow switching in pipes or ducting up to 0.3 m (12'). The compact relay controller reliably actuates valves, pump... Read More

FST200R-300R
Product Number Media Type Velocity Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Supply Power Wire Length
FST-211-R
$633.45
Available
in 8 weeks
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
3/4" to 1 1/2"
PP, PVDF
10 A SPDT
12 to 36 Vdc
10'
FST-221-R
$581.95
Available
in 8 weeks
Liquid
0.04 to 3 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
2" to 12"
PP, PVDF
10 A SPDT
12 to 36 Vdc
10'
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Thermal Dispersion Flow Switches for Use With Gases

OMEGA’s FST-320 Series thermal dispersion flow switches, especially designed for use with gases, sense changes in the heat transfer characteristics of the gases. Flow velocities f... Read More

FST320
Product Number Media Type Velocity Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Supply Power Wire Length Features
FST-321-SPST
$229.69
Available
in 3 weeks
Gas
1 to 90 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
3/4" to 1 1/2"
PP, PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-322-SPST
$370.80
Available
in 8 weeks
Gas
1 to 90 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
3/4" to 1 1/2"
PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-323-SPST
$239.99
Available
in 6 weeks
Gas
1 to 90 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
2" to 12"
PP, PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
FST-324-SPST
$381.10
Available
in 8 weeks
Gas
1 to 90 FPS
±5%
150 psi
60 °C (140 °F)
NPT Male
2" to 12"
PVDF
1 A SPST Relay
12 to 36 Vdc
10'
Switch Type Selectable, NO or NC
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MINI PLASTIC FLOW SWITCH

The FSW-120 Series of compact PPS switches are ideal for use where space is at a premium. Designed for use with water and water based solutions, these switches are suitable... Read More

FSW-120
Product Number Media Type Flow Range Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Wire Length Features
FSW-121
$116.28
Available
in 4 weeks
Water
0.1 to 1.5 GPM
±15%
250 psi
107 °C (225 °F)
UNF
9/16"-18
316 SS, Polyphenylene Sulfide, FKM
20 VA SPDT
24"
0.10 GPM Switch Point
FSW-123
$116.28
Available
in 5 weeks
Water
0.1 to 1.5 GPM
±15%
250 psi
107 °C (225 °F)
UNF
9/16"-18
316 SS, Polyphenylene Sulfide, FKM
20 VA SPDT
24"
0.50 GPM Switch Point
FSW-122
$116.28
Available
in 4 weeks
Water
0.1 to 1.5 GPM
±15%
250 psi
107 °C (225 °F)
UNF
9/16"-18
316 SS, Polyphenylene Sulfide, FKM
20 VA SPDT
24"
0.25 GPM Switch Point
FSW-124
$116.28
Available
in 4 weeks
Water
0.5 to 2 GPM
±15%
250 psi
107 °C (225 °F)
UNF
9/16"-18
316 SS, Polyphenylene Sulfide, FKM
20 VA SPDT
24"
0.75 GPM Switch Point
FSW-126
$116.28
Available
in 5 weeks
Water
0.6 to 1.5 GPM
±15%
250 psi
107 °C (225 °F)
UNF
9/16"-18
316 SS, Polyphenylene Sulfide, FKM
20 VA SPDT
24"
1.50 GPM Switch Point
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Liquid Micro-Flow Switches

The FSW-40A and FSW-50 Series flow switches feature 15 A SPDT switches and an internal screw adjustment for in-line monitoring of switch points. Multiple drag disks provide increm... Read More

FSW530-series
Product Number Flow Rate Body Material Switch Type Compatible Media Features
FSW531-S
$490.25
Available
in 3 weeks
SS flow switch 20 to 100 mL/min
Stainless Steel
FET
Water
Standard
en-US
en
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