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Flow Switches

No moving parts, not susceptible to contamination and can be oriented in any pipe configuration...
[+]
17 Products found
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The FSW800B Series air-flow monitor provides a simple but reliable alternative to indicate positive or negative air flow of fans. When properly installed and connected in series w... Read More

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FSW800B
Product Number Media Type Velocity Range Max Process Temperature Wetted Materials Switch Rating and Type Wire Length Features
FSW802B
$49.00
578  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NO
20"
Mounting Clip and Clamp
FSW801B
$49.00
58  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NC
20"
Mounting Clip and Clamp
FSW808B
$49.00
57  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NO
20"
4.72" Finger Guard
FSW807B
$49.00
137  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NC
20"
4.72" Finger Guard
FSW804B
$49.00
99  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NO
20"
3.15" Finger Guard
  Load More Items from this family (1) ...
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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

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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
1  In Stock
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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FSW-20 series paddle-type switches easily install into pipes ranging in size from 1¼' on up using an ordinary pipe tee or threaded weld coupling. The paddle pivots to move out... Read More

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FSW21-22
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
FSW-21
$233.00
5  In Stock
Liquid
5 to 52 GPM
±25%
2,000 psi
149 °C (300 °F)
NPT Male
1"
Brass, 302 SS, PTFE, Ceramic
20 VA SPDT
24"
FSW-22
$360.00
Available
in 3 weeks
Liquid
5 to 52 GPM
±25%
2,000 psi
149 °C (300 °F)
NPT Male
1"
316 SS, 302 SS, PTFE, Ceramic
20 VA SPDT
24"
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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

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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-221-SPST
$229.69
5  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-211-SPST
$219.39
5  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-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
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
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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

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FSW40-50
Product Number Media Type Velocity Range Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Features
FSW-42A
$455.00
8  In Stock
Liquid
2.0 to 15 FPS
300 psi
82 °C (180 °F)
NPT Male
1"
Brass, 316 SS, Phosphor Bronze, EPDM
15 A SPDT
For 3" to 10" Pipe Sizes
FSW-41A
$455.00
6  In Stock
Liquid
2.0 to 15 FPS
300 psi
82 °C (180 °F)
NPT Male
1"
Brass, 316 SS, Phosphor Bronze, EPDM
15 A SPDT
For 1¹⁄₂" to 2¹⁄₂" Pipe Sizes
FSW-51
$237.66
7  In Stock
Liquid
2.7 to 10.8 FPS
100 psi
93 °C (200 °F)
NPT Male
1 1/4"
316 SS, Polyphenylene Sulfide, FKM
15 A SPDT
For 1¹⁄₂" to 2¹⁄₂" Pipe Sizes
FSW-40A
$455.00
1  In Stock
Liquid
2.0 to 15 FPS
300 psi
82 °C (180 °F)
NPT Male
1"
Brass, 316 SS, Phosphor Bronze, EPDM
15 A SPDT
For 1" Pipe Sizes
FSW-43A
$455.00
Available
in 3 weeks
Liquid
2.0 to 15 FPS
300 psi
82 °C (180 °F)
NPT Male
1"
Brass, 316 SS, Phosphor Bronze, EPDM
15 A SPDT
For 10" to 48" Pipe Sizes
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The FSW301 flow switch comprises a paddle system with a permanent magnet attached. Above that magnet is a reed contact, located outside the flow of fluid. A second magnet with opp... Read More

quickShip This product has variations available for quick shipping.

FSW300-Series
Product Number Media Type Flow Range Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Features
FSW303
$267.80
4  In Stock
Liquid
1.8 to 2.4 GPM
362 psi
110 °C (230 °F)
NPT Female
3/4"
Brass
26 VA SPST
Not Applicable
FSW301
$239.99
Available
in 7 days
Liquid
4 to 132 GPM
365 psi
110 °C (230 °F)
NPT Male
1/2"
Brass, SS, Polypropylene, Noryl
26 VA SPST
Not Applicable
FSW302
$267.80
Available
in 5 weeks
Liquid
0.9 to 1.1 GPM
362 psi
110 °C (230 °F)
NPT Male
1/2"
Brass
26 VA SPST
Not Applicable
FSW304
$267.80
Available
in 4 weeks
Liquid
3.5 to 4.4 GPM
362 psi
110 °C (230 °F)
NPT Female
1"
Brass
26 VA SPST
Not Applicable
FSW304-G
$170.98
Available
in 4 weeks
Liquid
3.5 to 4.4 GPM
362 psi
110 °C (230 °F)
NPT Female
1"
Brass
26 VA SPST
G Thread
  Load More Items from this family (3) ...
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The FST1000 Series measures air velocity and provides two SPST alarm contact closures corresponding to high and low alarm set points. The alarm set points are adjustable from 0 to... Read More

quickShip This product has variations available for quick shipping.

FST1000
Product Number Media Type Velocity Range Accuracy Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Supply Power Wire Length Features
FST1001R
$339.90
2  In Stock
Air
0 to 5,000 FPM
±2%
93 °C (200 °F)
Compression Fitting
1/4"
304 SS
2 SPST NO Relays
15 to 24 Vdc
12"
Remote Probe
FST1002R
$339.90
Available
in 3 weeks
Air
0 to 10,000 FPM
±2%
93 °C (200 °F)
Compression Fitting
1/4"
304 SS
2 SPST NO Relays
15 to 24 Vdc
12"
Remote Probe
FST1002A
$298.70
Available
in 3 weeks
Air
0 to 10,000 FPM
±2%
93 °C (200 °F)
Compression Fitting
1/4"
304 SS
2 SPST NO Relays
15 to 24 Vdc
12"
Fixed Probe
FST1001A
$298.70
Available
in 3 weeks
Air
0 to 5,000 FPM
±2%
93 °C (200 °F)
Compression Fitting
1/4"
304 SS
2 SPST NO Relays
15 to 24 Vdc
12"
Fixed Probe
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The FSW-25 flow switch utilizes the force of liquid flow to propel its paddle and to detect the incoming flow or movement of the existing liquid in the pipe. In static liquid or no... Read More

quickShip This product has variations available for quick shipping.

FSW-25-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-25
$295.00
13  In Stock
Liquid
See Product Specs
±1%
355 psi
149 °C (300 °F)
PT
1"
304 SS, Aluminum
SPDT
200 Vdc
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The FSW-30A flow switch is supplied with six orifices to provide 6 overlapping flow ranges from 0.12 to 8.0 GPM for water. The FSW-31 is supplied with 3 different drag discs to pr... Read More

quickShip This product has variations available for quick shipping.

FSW30
Product Number Media Type Flow Range Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type
FSW-31A
$435.00
4  In Stock
Water
6 to 70 GPM
300 psi
82 °C (180 °F)
NPT Female
1"
Brass, 316 SS, Phosphor Bronze, EPDM, PVC
15 A SPDT
FSW-32A
$370.00
4  In Stock
Water
4 to 8 GPM
300 psi
82 °C (180 °F)
NPT Female
1"
Brass, 316 SS, Phosphor Bronze, EPDM, PVC
15 A SPDT
FSW-30A
$560.00
7  In Stock
Water
0.12 to 8 GPM
300 psi
82 °C (180 °F)
NPT Female
1/2"
Brass, 316 SS, Phosphor Bronze, EPDM
15 A SPDT
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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

quickShip This product has variations available for quick shipping.

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
2  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-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-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-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-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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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

quickShip This product has variations available for quick shipping.

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
10  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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The FSW500 offers low cost flow monitoring with a variety of switch actuation points and low pressure drop. All wetted parts are polypropylene or stainless steel, making th... Read More

FSW500
Product Number Media Type Accuracy Max Operating Pressure Max Process Temperature Process Connection Type Process Connection Size Wetted Materials Switch Rating and Type Wire Length Features
FSW503
$78.00
1  In Stock
Liquid
±20%
100 psi
100 °C (212 °F)
NPT Female
3/4"
Polypropylene, 316 SS, FKM
20 VA SPST
48"
1.00 GPM Switch Point
FSW506
$78.00
2  In Stock
Liquid
±20%
100 psi
100 °C (212 °F)
NPT Female
3/4"
Polypropylene, 316 SS, FKM
20 VA SPST
48"
5.00 GPM Switch Point
FSW502
$78.00
Available
in 5 weeks
Liquid
±20%
100 psi
100 °C (212 °F)
NPT Female
3/4"
Polypropylene, 316 SS, FKM
20 VA SPST
48"
0.50 GPM Switch Point
FSW501
$78.00
Available
in 7 days
Liquid
±20%
100 psi
100 °C (212 °F)
NPT Female
3/4"
Polypropylene, 316 SS, FKM
20 VA SPST
48"
0.25 GPM Switch Point
FSW504
$78.00
Available
in 5 weeks
Liquid
±20%
100 psi
100 °C (212 °F)
NPT Female
3/4"
Polypropylene, 316 SS, FKM
20 VA SPST
48"
2.00 GPM Switch Point
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