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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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17 Products found
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Flow Switches for Threaded Plastic Piping

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
FSW505
$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"
2.50 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
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
  Load More Items from this family (1) ...
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Industrial Flow Switches From 0.12 to 70 GPM Non-magnetic - ideal for Rusty Water

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

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
8  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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Thermal Dispersion Flow Switches

The FSW-6000/7000 Series are thermal flow switch monitors designed to monitor flow status and also used to detect level of liquids, air and gas. A chain of 8 LED’s gives the user ... Read More

FSW6000-7000
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 Features
FSW-7113
$545.70
1  In Stock
Liquid, Gas
Liquid 0.09 to 9.84 FPS, Gas 0.16 to 49 FPS
±10%
4,351 psi
80 °C (176 °F)
NPT Male
1/2"
316 SS
5 A SPDT
24 Vdc
3" Insertion Length
FSW-6212
$535.00
Available
in 8 weeks
Liquid, Gas
Liquid 0.09 to 9.84 FPS, Gas 0.16 to 49 FPS
±10%
4,351 psi
80 °C (176 °F)
NPT Male
3/4"
316 SS
5 A SPDT
85 to 240 Vac
2" Insertion Length
FSW-7111
$545.70
Available
in 8 weeks
Liquid, Gas
Liquid 0.09 to 9.84 FPS, Gas 0.16 to 49 FPS
±10%
4,351 psi
80 °C (176 °F)
NPT Male
1/2"
316 SS
5 A SPDT
24 Vdc
1 3/8" Insertion Length
FSW-7112
$545.70
Available
in 8 weeks
Liquid, Gas
Liquid 0.09 to 9.84 FPS, Gas 0.16 to 49 FPS
±10%
4,351 psi
80 °C (176 °F)
NPT Male
1/2"
316 SS
5 A SPDT
24 Vdc
2" Insertion Length
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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-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
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-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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Industrial Flow Switches - From 2 to 15 Feet/second

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

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-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-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-42A
$455.00
3  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-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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Compact Fan and Filter Fan Air Flow Monitor

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

FSW800B
Product Number Media Type Velocity Range Max Process Temperature Wetted Materials Switch Rating and Type Wire Length Features
FSW808B
$49.00
77  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NO
20"
4.72" Finger Guard
FSW802B
$49.00
622  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NO
20"
Mounting Clip and Clamp
FSW801B
$49.00
87  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NC
20"
Mounting Clip and Clamp
FSW807B
$49.00
152  In Stock
Air
Greater than 8.2 FPS
50 °C (122 °F)
Plastic
NC
20"
4.72" Finger Guard
FSW804B
$49.00
49  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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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
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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Trim-to-size Paddle Type Switches for ‘flow/no Flow’ Detection for Piping Systems 11/4" and Up

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

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
6  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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IN-LINE PLASTIC FLOW SWITCH

The FSW-140 Series rugged inline flow switches offer superior performance. Their fixed set-point and simple design make it a dependable switch. This series is an ideal choice for ... Read More

FSW-140
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-141
$63.75
1  In Stock
Liquid
0.07 to 2 GPM
±20%
125 psi
100 °C (212 °F)
NPT Male
3/8"
316 SS, Polypropylene, Polyphenylene Sulfide, FKM
10 VA SPST
24"
0.07 GPM Switch Point
FSW-145
$63.75
Available
in 4 weeks
Liquid
0.07 to 2 GPM
±20%
125 psi
100 °C (212 °F)
NPT Male
3/8"
316 SS, Polypropylene, Polyphenylene Sulfide, FKM
10 VA SPST
24"
1.00 GPM Switch Point
FSW-142
$63.75
Available
in 4 weeks
Liquid
0.07 to 2 GPM
±20%
125 psi
100 °C (212 °F)
NPT Male
3/8"
316 SS, Polypropylene, Polyphenylene Sulfide, FKM
10 VA SPST
24"
0.15 GPM Switch Point
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Flow Switches

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

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
FSW301
$239.99
5  In Stock
Liquid
4 to 132 GPM
365 psi
110 °C (230 °F)
NPT Male
1/2"
Brass, SS, Polypropylene, Noryl
26 VA SPST
Not Applicable
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
FSW304
$267.80
Available
in 5 weeks
Liquid
3.5 to 4.4 GPM
362 psi
110 °C (230 °F)
NPT Female
1"
Brass
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
FSW301-G
$162.74
Available
in 3 weeks
Liquid
4 to 132 GPM
365 psi
110 °C (230 °F)
NPT Male
1/2"
Brass, SS, Polypropylene, Noryl
26 VA SPST
G Thread
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