Flow Switches

Flow Switches monitor and control liquid, gas, or steam flow in your hydronic systems. These devices trigger when flow hits preset rates, preventing damage and ensuring proper operation. Jackson Systems offers switches in multiple materials and pipe sizes to fit your exact project needs.

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Showing 97–144 of 202 resultsSorted by popularity

Mini Flow Switch, Brass Body, Low Flow NPT, SPDT, Explosion Proof

Dwyer

SKU: V6EPB-B-S-LF
$500.16
MSRP: $575.18
You save 15%
Dwyer V6EPB-B-S-LF Mini Flow Switch, Brass Body, Low Flow NPT, SPDT, Explosion Proof quantity
Mini Flow Switch, Brass Body, 2″ NPT, SPDT, Explosion Proof

Dwyer

SKU: V6EPB-B-S-6-0
$357.70
MSRP: $411.36
You save 15%
Dwyer V6EPB-B-S-6-0 Mini Flow Switch, Brass Body, 2" NPT, SPDT, Explosion Proof quantity
Mini Flow Switch, Brass, 1″ NPT, SPDT, Explosion Proof

Dwyer

SKU: V6EPB-B-S-3-B
$440.05
MSRP: $506.06
You save 15%
Dwyer V6EPB-B-S-3-B Mini Flow Switch, Brass, 1" NPT, SPDT, Explosion Proof quantity
Mini Flow Switch, Brass Body, 3/4″ NPT, SPDT, Explosion Proof

Dwyer

SKU: V6EPB-B-S-2-B
$381.80
MSRP: $439.07
You save 15%
Dwyer V6EPB-B-S-2-B Mini Size Flow Switch, Brass, 3/4" NPT, SPDT, Explosion Proof quantity
Mini Flow Switch, Brass, 1-1/4″ NPT, DPDT, Explosion Proof

Dwyer

SKU: V6EPB-B-D-4-B
$558.81
MSRP: $642.63
You save 15%
Dwyer V6EPB-B-D-4-B Mini Size Flow Switch, Brass, 1-1/4" NPT, DPDT, Explosion Proof quantity
Thermal Flow Switch for Reliable Fluid Flow Detection

Dwyer

SKU: TDFS2-2-P-06
$667.09
MSRP: $767.15
You save 15%
Dwyer TDFS2-2-P-06 Thermal Flow Switch quantity
Averaging Flow Sensor, 7-21/32″ Insertion, 1/4″ ID, 3/8″ OD

Dwyer

SKU: PAFS-1004
$21.79
MSRP: $25.06
You save 15%
Dwyer PAFS-1004 Averaging Flow Sensor, 7-21/32" Insertion, 1/4" ID, 3/8" OD quantity
Averaging Flow Sensor, 5-13/32″ Insertion, Air & Compatible Gases

Dwyer

SKU: PAFS-1003
$13.60
MSRP: $15.64
You save 15%
Dwyer PAFS-1003 Averaging Flow Sensor, 5-13/32" Insertion, 1/4" ID Tubing quantity
Averaging Flow Sensor, 3-5/32″ Insertion, Air & Compatible Gases

Dwyer

SKU: PAFS-1002
$14.73
MSRP: $16.94
You save 15%
Dwyer PAFS-1002 Averaging Flow Sensor, 3-5/32" Insertion, 1/4" ID, 3/8" OD quantity
Polycarbonate Flowmeter, 2–20 GPM Water, 1″ Male NPT, SS Float

Dwyer

SKU: LFME-13-F2
$234.99
MSRP: $270.24
You save 15%
Dwyer LFME-13-F2 Polycarbonate Flowmeter, 2–20 GPM Water, 1" Male NPT, SS Float quantity
Float Switch for Liquid Level Detection & Control

Dwyer

SKU: L8-WP2
$225.11
MSRP: $258.88
You save 15%
Dwyer L8-WP2 Float Switch quantity
Liquid Level Switch, Brass, SPDT, 1″ Side Wall Mount, Explosion Proof

Dwyer

SKU: L6EPB-B-S-3-A
$466.74
MSRP: $536.75
You save 15%
Dwyer L6EPB-B-S-3-A Liquid Level Switch, Brass, SPDT, 1" Side Wall Mount quantity
Liquid Level Switch, Brass, SPDT, 1″ Line Size, Horizontal Mount

Dwyer

SKU: L6EPB-B-S-3-0
$404.03
MSRP: $464.63
You save 15%
Dwyer L6EPB-B-S-3-0 Liquid Level Switch, Brass, SPDT, 1" Horizontal Mount quantity
Liquid Level Switch, Brass, SPDT, 1″ Line, Explosion Proof, Horizontal

Dwyer

SKU: L6-EPB-B-S-3-H
$542.93
MSRP: $624.37
You save 15%
Dwyer L6-EPB-B-S-3-H Liquid Level Switch, Brass, SPDT, 1" Line, Explosion Proof quantity
Float Switch, Brass Body, 316 SS Float, Side Wall Mount, SPDT

Dwyer

SKU: L4
$857.83
MSRP: $986.50
You save 15%
Dwyer L4 Float Switch, Brass/316 SS, Side Wall Mount, Weatherproof & Explosion Proof, SPDT quantity
Plastic Flow Meter, 1″ NPT, 3–30 GPM / 11–113 LPM Range

Dwyer

SKU: HFPC-3-4
$417.38
MSRP: $479.99
You save 15%
Dwyer HFPC-3-4 Plastic Flow Meter, 1" NPT, 3–30 GPM / 11–113 LPM quantity
Vertical Level Switch, 316 SS Stem & Float, 1/8″ NPT, 300°F, 450 PSIG

Dwyer

SKU: F7-SS2
$94.41
MSRP: $108.57
You save 15%
Dwyer F7-SS2 Vertical Level Switch, 316 SS Stem & Float, 1/8" NPT, 300°F, 450 PSIG quantity
Air Flow Switch, Adjustable 400–1600 FPM, SS Vane, SPDT

Dwyer

SKU: 530
$164.46
MSRP: $189.13
You save 15%
Dwyer 530 Air Flow Switch, Adjustable 400–1600 FPM, SS Vane, SPDT quantity
120V AC 1/2″ MPT Pressure or Flow Switch

Henry Technologies

SKU: S-9400A
$132.00
MSRP: $151.80
You save 15%
Henry Technologies S-9400A 120V AC 1/2" MPT Switch quantity
Airflow Switch for Greenheck Ventilation Systems

Greenheck

SKU: 382993
$102.00
MSRP: $117.30
You save 15%
Greenheck 382993 Airflow Switch quantity
1-1/4″ NPT SPDT Industrial Liquid Flow Switch, 300 PSI, NEMA 4X

McDonnell & Miller

SKU: FS7-4W
$812.25
MSRP: $934.09
You save 15%
McDonnell & Miller FS7-4W 1-1/4" NPT SPDT Industrial Liquid Flow Switch 120201 quantity
1-1/4″ NPT SPDT Industrial Liquid Flow Switch, SS Body, 1000 PSI, NEMA 4X

McDonnell & Miller

SKU: FS7-4SW
$1,301.09
MSRP: $1,496.25
You save 15%
McDonnell & Miller FS7-4SW 1-1/4" NPT SPDT Industrial Liquid Flow Switch, SS Body, 1000 PSI, NEMA 4X quantity
1-1/4″ NPT Industrial Liquid Flow Switch, SS Body, 1000 PSI Max

McDonnell & Miller

SKU: FS7-4S
$1,096.85
MSRP: $1,261.38
You save 15%
Xylem-McDonnell & Miller FS7-4S 1-1/4" NPT Industrial Liquid Flow Switch, SS Body, 1000 PSI quantity
1-1/4″ NPT SPDT Explosion Proof Liquid Flow Switch, 300 PSI

McDonnell & Miller

SKU: FS7-4E
$992.74
MSRP: $1,141.65
You save 15%
McDonnell & Miller FS7-4E 1-1/4" NPT SPDT Explosion Proof Liquid Flow Switch 120100 quantity
1-1/4″ NPT SPDT Industrial Liquid Flow Switch, 300 PSI, Bronze Paddles

McDonnell & Miller

SKU: FS7-4
$644.48
MSRP: $741.15
You save 15%
Xylem-McDonnell & Miller FS7-4 1-1/4" NPT SPDT Industrial Liquid Flow Switch 119700 quantity
1″ NPT In-Line General Purpose Flow Switch, Snap-Acting SPDT

McDonnell & Miller

SKU: FS5-1
$413.73
MSRP: $475.79
You save 15%
Xylem-McDonnell & Miller FS5-1 1" NPT In-Line Flow Switch SPDT 114780 quantity
1″ NPT SPDT Liquid Flow Switch, 160 PSI, SS Paddles, Test Button

McDonnell & Miller

SKU: FS4-3RP-T
$304.80
MSRP: $350.52
You save 15%
Xylem-McDonnell & Miller FS4-3RP-T 1" NPT SPDT General Purpose Liquid Flow Switch quantity
1″ BSPT SPDT Liquid Flow Switch, 160 PSI Max, SS Paddles

McDonnell & Miller

SKU: FS4-3J
$257.73
MSRP: $296.39
You save 15%
Read more
1″ NPT General Purpose Liquid Flow Switch, 2-SPDT, 160 PSI Max

McDonnell & Miller

SKU: FS4-3D
$379.10
MSRP: $435.97
You save 15%
Xylem-McDonnell & Miller FS4-3D 1" NPT General Purpose Liquid Flow Switch, 2-SPDT, 160 PSI (114550) quantity
1″ NPT SPDT Liquid Flow Switch, 160 PSI Max, SS Paddles

McDonnell & Miller

SKU: FS4-3
$234.29
MSRP: $269.43
You save 15%
McDonnell & Miller FS4-3 1" NPT SPDT General Purpose Liquid Flow Switch 114400 quantity
1″ NPT SPDT Snap Switch Liquid Flow Switch with NEMA 4 Enclosure

McDonnell & Miller

SKU: FS254
$293.44
MSRP: $337.46
You save 15%
Xylem-McDonnell & Miller FS254 1" NPT SPDT Liquid Flow Switch, NEMA 4 | SKU: FS254 quantity
1″ NPT SPDT Liquid Flow Switch with NEMA 1 Enclosure, SS Paddles

McDonnell & Miller

SKU: FS251
$219.13
MSRP: $252.00
You save 15%
McDonnell & Miller FS251 1" NPT SPDT Liquid Flow Switch, NEMA 1, SS Paddles quantity
1/2″ BSPT In-Line High Sensitivity Liquid Flow Switch, SPDT

McDonnell & Miller

SKU: FS1-J
$412.21
MSRP: $474.04
You save 15%
Xylem-McDonnell & Miller FS1-J 1/2" BSPT In-Line Liquid Flow Switch, SPDT quantity
1/2″ NPT In-Line High Sensitivity Liquid Flow Switch, SPDT

McDonnell & Miller

SKU: FS-1
$382.90
MSRP: $440.34
You save 15%
Xylem-McDonnell & Miller FS-1 1/2" NPT In-Line High Sensitivity Flow Switch quantity
6″ & 1″ Paddle Kit for FS4-3RP Flow Switch (FS4-15RP)

McDonnell & Miller

SKU: 336101
$25.24
MSRP: $29.03
You save 15%
Xylem-McDonnell & Miller 336101 6" & 1" Paddle Kit for FS4-3RP (FS4-15RP) quantity
Stainless Steel Paddle Kit for FS4-15SS Flow Switch

McDonnell & Miller

SKU: 310451
$32.23
MSRP: $37.06
You save 15%
McDonnell & Miller 310451 Stainless Steel Paddle Kit FS4-15SS quantity
Replacement Switch for FS4-3 Series Flow Switches (FS4-33)

McDonnell & Miller

SKU: 305200
$128.86
MSRP: $148.19
You save 15%
Xylem-McDonnell & Miller 305200 Replacement Switch for FS4-3 Series (FS4-33) quantity
Snap Switch for FS1, FS4-3D, FS-5, FS-6, and AFE-1 Flow Switches

McDonnell & Miller

SKU: 304300
$146.71
MSRP: $168.72
You save 15%
Xylem-McDonnell & Miller 304300 Snap Switch for FS1, FS4-3D, FS-5, FS-6, AFE-1 (FS1-17) quantity
6-Bolt Flange Float Switch for Hydronic & Steam Systems

Hoffman Specialty

SKU: DA0391
$1,525.75
MSRP: $1,754.61
You save 15%
Xylem-Hoffman Specialty DA0391 6-Bolt Flange Float Switch quantity
Evaporator & Condenser Flow Sensor for York Systems

York

SKU: 325-43553-600
$1,452.48
MSRP: $1,670.35
You save 15%
York 325-43553-600 Evaporator & Condenser Flow Sensor quantity
Flow Sensor for York HVAC Systems

York

SKU: 025-44383-001
$2,379.68
MSRP: $2,736.63
You save 15%
York 025-44383-001 Flow Sensor quantity
Flow Sensor with 1/4″ NPT Connection

York

SKU: 025-43553-001
$577.71
MSRP: $664.37
You save 15%
York 025-43553-001 Flow Sensor with 1/4" NPT Connection quantity
Flow Switch, OD 25.4mm

York

SKU: 024-26116-200
$369.25
MSRP: $424.64
You save 15%
York 024-26116-200 Flow Switch OD 25.4mm quantity
150# Flow Switch, OEM Replacement Part

York

SKU: 024-15793-000
$1,111.66
MSRP: $1,278.41
You save 15%
York 024-15793-000 150# Flow Switch quantity
Flow Switch Kit for York YLAA Air-Cooled Chillers

York

SKU: 393-12344-000
$4,050.38
MSRP: $4,657.94
You save 15%
York 393-12344-000 Flow Switch Kit for YLAA Chillers quantity
2.5″ Float Switch with Viton Seal — Liquid Level Control

Schneider Electric

SKU: 9037HG32Z20
$264.30
MSRP: $303.95
You save 15%
Schneider Electric (Square D) 9037HG32Z20 2.5" Float Switch with Viton quantity
2.5″ Float Switch Less Float with Viton Seals

Square D

SKU: 9037HG32LZ20
$215.76
MSRP: $248.12
You save 15%
Schneider Electric (Square D) 9037HG32LZ20 2.5" Float Switch Less Float w/Viton quantity
FQS Flow Switch, 1″ Pipe Size, SPDT

Danfoss

SKU: 061H4000
$99.38
MSRP: $114.29
You save 15%
Danfoss 061H4000 FQS Flow Switch 1" SPDT quantity