Flow Switch
2008
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 ITT McDONNELL FS4 3 LIQUID FLOW SWITCH 150 PSI 300 MAX NNB $62.00 Time Remaining: 29d 3h 53m Buy It Now for only: $62.00 |
 SPDT Paddle Type Flow Switch HFS 25 for Air Conditioner $32.60 Time Remaining: 59m |
 Magnetic plastic flow sensor Water flow switch Plastic $6.99 Time Remaining: 9d 3h 8m Buy It Now for only: $6.99 |
 JOHNSON CONTROLS F61KB 11C FLOW CONTROL SWITCH SPDT 3 IN 1 6 PADDLE NIB $35.99 Time Remaining: 28d 1h 22m Buy It Now for only: $35.99 |
 ITT MCDONNELL MILLER FS4 3F 114625 FLOW SWITCH NEW IN BOX $100.00 Time Remaining: 18d 41m Buy It Now for only: $100.00 |
 Industrial Screw Terminal Paddle Flow Switch AC 220V $50.95 Time Remaining: 17d 14h 23m Buy It Now for only: $50.95 |
 McDonnell Miller FS5 D 3 4 Flow Switch NIB $112.00 Time Remaining: 5h 54m |
 Compact Engineering5 21 PP Straight Body Flow Switch Prolypropylene $19.99 Time Remaining: 22d 15h 22m Buy It Now for only: $19.99 |
 POTTER PRESSURE ALARM FLOW SWITCH PS10 2A $9.95 Time Remaining: 25d 11h 1m Buy It Now for only: $9.95 |
 NEW GEMS FLOW SWITCH ROTOR FLOW 155480 RFI 2500P 1 2NPT $14.99 Time Remaining: 13d 2h 10m Buy It Now for only: $14.99 |
 AC 250V 15A Male Thread SPDT Water Flow Control Switch $30.30 Time Remaining: 3d 5h 47m Buy It Now for only: $30.30 |
 Air Conditioner Paddle Type Water Flow Switch AC 250V $30.27 Time Remaining: 4h 26m |
 FLOW SWITCH 7 30 4050 $40.00 Time Remaining: 26d 6h 58m Buy It Now for only: $40.00 |
 JOHNSON CONTROLS F61KD 3C FLOW CONTROL SWITCH RY20313 NEW $30.00 Time Remaining: 29d 23h 28m Buy It Now for only: $30.00 |
 Plastic Flow Water Switch Monitor Sensor $7.99 Time Remaining: 9d 3h 2m Buy It Now for only: $7.99 |
 NEW DRYING SYSTEMS 955 R AIR FLOW SWITCH 955R $150.00 Time Remaining: 29d 1h 53m Buy It Now for only: $150.00 |
 Air Conditioner Paddle Type Water Flow Switch AC 250V $32.65 Time Remaining: 6h 30m |
 Sika VKS05 Flow Monitoring Switch VKS05M0P17PR2E Lot of 2 $49.99 Time Remaining: 25d 3h 57m Buy It Now for only: $49.99 |
 Gems 25366 Flow Switch FS 10798 Stainless 1 2 NPT 1 75 SCFM $49.99 Time Remaining: 11d 2h 47m Buy It Now for only: $49.99 |
 Dwyer Instruments 530 Vane Operated Air Flow Switch $58.50 Time Remaining: 25d 1h 20m Buy It Now for only: $58.50 |
 NEW GEMS 80 GPM FS200 FLOW SWITCH SSU 1 VALVE PORTS $71.00 Time Remaining: 8d 4h 11m Buy It Now for only: $71.00 |
 GEMS Sensors FS 926 26951 50 CC Min Flow Switch NIB $50.00 Time Remaining: 28d 7h 26m Buy It Now for only: $50.00 |
 Flowtect Flow Switch Explotion Budy SS NPT1 1 4 ModV4SS2UPump Filling Stop $135.00 Time Remaining: 9h 43m Buy It Now for only: $175.00 |
 GEMS 44716 Flow Switch $29.99 Time Remaining: 3d 46m Buy It Now for only: $29.99 |
 Malema Sensor M 50 T21 Flow Switch 120VAC 96 SCCM $19.99 Time Remaining: 20d 8h 17m Buy It Now for only: $19.99 |
 McDonnell MillerFS8 W Flow Switch 1 NPT $65.00 Time Remaining: 24d 4h 51m Buy It Now for only: $65.00 |
 GEMS SENSORS ROTOR FLOW SWITCH RF 2500 155425 NEW IN ORIGINAL PKG $90.00 Time Remaining: 29d 23h 40m Buy It Now for only: $90.00 |
 McDONNELL MILLER FS4 3T3 3 4 NPT FLOW SWITCH $125.00 Time Remaining: 15h 37m |
 Qualitatssicherung Water Flow Switch VH315M1LEYBO51 00162315 $50.00 Time Remaining: 9d 7h 45m Buy It Now for only: $50.00 |
 ITT MCDONNELL MILLER FS1 FLOW SWITCH $60.00 Time Remaining: 22d 5h 48m Buy It Now for only: $60.00 |
 McDonnell Flow Switch 114780 1 NPT Brass Pipe Fitting 15 15 FPM Flow Rate $53.99 Time Remaining: 15d 10h 16m Buy It Now for only: $53.99 |
 Fluid FLOW SWITCH FS 3 GEMS SENSORS $30.00 Time Remaining: 22h 35m Buy It Now for only: $30.00 |
 AC 250V 15A Male Thread SPDT Water Flow Control Switch $30.30 Time Remaining: 8h 54m |
 Flotect Flow Switch Model V42U New $185.00 Time Remaining: 29d 1h 11m Buy It Now for only: $185.00 |
 Gems Sensors FS 3 Liquid Flow Switch 165841 $20.75 Time Remaining: 18d 6h 43m Buy It Now for only: $20.75 |
 NEW FLO MON 1 5 8 FLOW SWITCH USGPM 0 15 FM 15 AL LP 3EE 80 90CS 10N S1 D3 $299.99 Time Remaining: 29d 22h 45m Buy It Now for only: $299.99 |
 HARWIL 1 2 FLUID FLOW SWITCH 1 2 HP Q 1 2 F Q12F NEW $75.00 Time Remaining: 14d 7h 40m Buy It Now for only: $75.00 |
 AC 250V Water Cooling System Flow Valve Paddle Switch $48.76 Time Remaining: 7h 10m |
 ANTUNES JD2 GREY SPRING Air Flow Switch JD 2 GREY $39.99 Time Remaining: 13d 42m Buy It Now for only: $39.99 |
 Gems Sensors FS 4 Flow Switch 44728 Used $15.00 Time Remaining: 16d 12h 1m Buy It Now for only: $15.00 |
 Lot of 5 Used Compac Engineering Erecta Straight Body Flow Switch 5 21 $30.00 Time Remaining: 27d 6h 14m Buy It Now for only: $30.00 |
 NEW GEMS SENSORS FS 3 FLOW CONTROL VALVE SWITCH PART 165841 $15.00 Time Remaining: 28d 6h 44m Buy It Now for only: $15.00 |
 Proteus 0100C24 Fluid Flow Switch Sensor Liquid Module Selectable Range 24V $39.99 Time Remaining: 16h 35m Buy It Now for only: $39.99 |
 CCS Custom Control Dual Snap 6255F 52S Flow Switch 825 675 GPM Flowswitch $9.95 Time Remaining: 1d 10h 34m |
 AC 250V 15A Male Thread SPDT Water Flow Control Switch $31.52 Time Remaining: 23d 17h 49m Buy It Now for only: $31.52 |
 GEMS Flow Switch Type FS 380 $26.00 Time Remaining: 29d 5h 6m Buy It Now for only: $26.00 |
 ITT McDonnell Miller FS7 4 A 1 1 4 Flow Switch C12 $60.00 Time Remaining: 27d 8h 53m Buy It Now for only: $60.00 |
 SMC PFA Series PFA711 N03 67 Pneumatic Air Digital Flow Switch $50.00 Time Remaining: 19d 5h 36m Buy It Now for only: $50.00 |
 Transamerica Delaval Flow Switch made by Gems Division P N 26915 NO RESERVE $20.00 Time Remaining: 3d 23h 43m |
 Gems Sensors FS 4 Liquid Flow Switch 181417 $24.90 Time Remaining: 18d 6h 29m Buy It Now for only: $24.90 |
 Gems Sensors FS 150 Flow Switch 20 VA $59.99 Time Remaining: 10d 17h 52m Buy It Now for only: $59.99 |
 GEMS Flow Switch FS 4 166431 NEW CANADA $34.99 Time Remaining: 3d 3h 16m Buy It Now for only: $34.99 |
 AUTOFLOW ADJUSTABLE GAS FLOW SWITCH P N FS5104CV 3 $49.99 Time Remaining: 10d 3h 15m Buy It Now for only: $49.99 |
 Water Flow Meter w Flow Switch 13 13 GPM 230 psi German NOS $68.00 Time Remaining: 4d 1h 36m Buy It Now for only: $75.00 |
 New Gems Flow Switch 165840 $27.00 Time Remaining: 18d 4h 13m Buy It Now for only: $27.00 |
 Gems Flow Switch P N 226860 Spec 010 GPM $59.00 Time Remaining: 9d 3h 23m Buy It Now for only: $59.00 |
 CTE CHEM TEC TECH Flow Monitor Switch 3 Wire Brass Explosion proof Series 500BX $12.99 Time Remaining: 21d 4h 15m Buy It Now for only: $12.99 |
 GEMS Flow Switch 155421 $24.99 Time Remaining: 12d 4h 11m Buy It Now for only: $24.99 |
 OMEGA FSW 611425 FLOW SWITCH $25.00 Time Remaining: 2d 13h 13m Buy It Now for only: $200.00 |
 AC 250V Water Cooling System Flow Valve Paddle Switch $32.69 Time Remaining: 21d 21h 54m Buy It Now for only: $32.69 |
 Equal Inc Brass Water Flow Switch 175 H2O 1 GPM SSU 9886B 101 $34.00 Time Remaining: 29d 6h 31m Buy It Now for only: $34.00 |
 GEMS FLOW SWITCH P N 26446 FS 400 NEW SURPLUS $42.00 Time Remaining: 16d 6h 41m Buy It Now for only: $42.00 |
 SMC Digital Flow Switch PFA750 N02 27 $75.00 Time Remaining: 8d 6h 19m Buy It Now for only: $75.00 |
 FLOTECH FLOTECT V6EPB BS4B FLOW SWITCH BRASS 3 4 HAZARDOUS LOCATIONS $75.00 Time Remaining: 2d 7h 12m Buy It Now for only: $75.00 |
 GEMS 168433 FS 380 BRASS FLOW SWITCH 05GPM 3 8NPT 54801 $3.00 Time Remaining: 6d 2h 30m |
 Fluid FLOW SWITCH pressure controls flow switch 01 gpm $60.00 Time Remaining: 16d 34m Buy It Now for only: $60.00 |
 MKS Type 1179A Mass Flow Controller 1179A 23494 5 SCCM N2 Switch Mas Flo $724.90 Time Remaining: 12d 4h 39m Buy It Now for only: $724.90 |
 NIB DWYER V6EPB B S LF MINI LOW FLOW SWITCH 1 2 NPT $100.00 Time Remaining: 8d 18h 25m Buy It Now for only: $100.00 |
 SMC Flow Switch 2 16 L min 1MPa PF2W720 N03 27 $523.17 Time Remaining: 21d 6h 34m Buy It Now for only: $523.17 |
 1x FS 3 806 165842 GEMS IN LINE FLOW SWITCH BRAND NEW IN PACKAGE $0.99 (1 Bid) Time Remaining: 2d 1h 31m |
 Proteus Flow Switch 100B110 1 4 8 60 GPM Brass 110V New $119.95 Time Remaining: 27d 9h 22m Buy It Now for only: $119.95 |
 Penn Baso CounerLine Flow Switch F61KB 11 SPDT 3 in 1 Paddle + 6 paddle NEW $34.99 Time Remaining: 29d 5h 30m Buy It Now for only: $34.99 |
 FLOWLINE FLOW CONTROLLER SWITCH 120 240V LC10 1001 New $72.25 Time Remaining: 4d 3h 6m Buy It Now for only: $72.25 |
 NEW GEMS 168433 FS 380 BRASS FLOW SWITCH 05GPM 3 8NPT 54800 $49.99 Time Remaining: 17d 23h 44m Buy It Now for only: $49.99 |
 GEMS FLOW SWITCH TYPE FS 930 P N 51586 SOLID BRASS NEW $29.99 Time Remaining: 2d 22h 15m Buy It Now for only: $39.99 |
 Malema Sensor M 50 T21 Flow Switch 120VAC 180 SCCM $19.99 Time Remaining: 20d 8h 17m Buy It Now for only: $19.99 |
 LOT 2 MATCO AC 780 LEAK SEEKER FS 10 FLOW SENSOR SWITCH $74.99 Time Remaining: 3d 9h 25m Buy It Now for only: $74.99 |
 Gems Sensors NC Liquid Flow Switch FS 927 025 GPM $39.99 Time Remaining: 13d 17h 47m Buy It Now for only: $39.99 |
 GEMS Sensors GPM FS200 Flow Switch $31.32 Time Remaining: 14d 22h 6m Buy It Now for only: $31.32 |
 Gems FS 380 Flow Switch 025 GPM 120 240 VAC Pilot Duty $34.95 Time Remaining: 6d 8h 39m |
 Proteus Fluid Flow Switch 0100CT series 0100CT $120.00 Time Remaining: 18d 26m Buy It Now for only: $120.00 |
 GEMS FS 400 3 4 FLOW SWITCH P N 26444 $69.99 Time Remaining: 16d 1h 13m Buy It Now for only: $69.99 |
 GEMS FLOW SWITCH 26915 NEW $20.00 Time Remaining: 7d 7h 9m Buy It Now for only: $20.00 |
 MOLTEN METAL 501459 FS2326 EXPLOSION PROOF FLOW SWITCH $100.00 Time Remaining: 22d 1h 20m Buy It Now for only: $100.00 |
 GEMS 26615 FLOW SWITCH FS 200 1 ADJ BRASS NEW IN BOX PILOT DUTY 50 240VAC $199.95 Time Remaining: 15d 11h 4m Buy It Now for only: $199.95 |
 SMC PF2W720 04 27 DIGITAL FLOW SWITCH FOR WATER NIB $59.99 Time Remaining: 22h 46m Buy It Now for only: $69.99 |
 NEW GEMS FS 927 BRASS FLOW SWITCH 70820 1 15 GPM $75.00 Time Remaining: 18d 30m Buy It Now for only: $75.00 |
 GEMS FLOW SWITCH P N 2644 SHUTTLE TYPE FS 200 400 TRANSAMERICA DLAVAL $29.99 Time Remaining: 13d 7h 20m Buy It Now for only: $29.99 |
 GEMS FS 380 212104 Compact Flow Switch $49.99 Time Remaining: 25d 5h 56m Buy It Now for only: $49.99 |
 New Gems 1 4 Brass FS Series Flow Switch FS 925 NR $72.24 Time Remaining: 11d 7h 38m Buy It Now for only: $72.24 |
 SMC PF2W720 04 27 DIGITAL FLOW SWITCH FOR WATER NIB $59.99 Time Remaining: 22h 46m Buy It Now for only: $69.99 |
 Gems Flow Switch HPE 920 Series P N 62198 25 GPM $49.95 Time Remaining: 28d 6h 52m Buy It Now for only: $49.95 |
 Malema M 60X 523 10 041 Explosion Proof Flow Switch NEW $45.00 Time Remaining: 8d 10h 41m Buy It Now for only: $45.00 |
 HFS 25 Water Flow Switch AC 250V SPDT Paddle $22.99 Time Remaining: 24d 10h 24m Buy It Now for only: $22.99 |
 GEMS 118424 FLOW SWITCH NIB $25.00 Time Remaining: 23d 14h 21m Buy It Now for only: $25.00 |
 NEW AUTOFLOW FS5904CV FLOW SWITCH 500PSIG 316 SS 1 4NPT HIGH FLOW $349.99 Time Remaining: 9d 1h 11m |
 MCDONNELL MILLER FS1 FLOW SWITCH 1 2 NPT USED $50.00 Time Remaining: 7d 7h 12m Buy It Now for only: $50.00 |
 SIEMENS 141 0574 POWERS SPDT SWITCH TYPE AIR FLOW SWITCH NIB $49.95 Time Remaining: 29d 9h 31m Buy It Now for only: $49.95 |
 KSR KUEBLER RVM U 2 G 1 2 FLOW SWITCH 300330787 $39.99 Time Remaining: 2d 3h 12m Buy It Now for only: $39.99 |
 JOHNSON CONTROLS F61KB 11C FLOW CONTROL SWITCH SPDT 3 IN 1 6 PADDLE NIB SEALED $39.99 Time Remaining: 25d 6h 17m Buy It Now for only: $39.99 |
Flow Switch
Flow Switch: Different Options for Different Uses
A flow switch isn't something that you have to think about every day but they are an essential component for most types of pumps, cooling systems and even flow monitoring systems. If they aren't working properly the pump doesn't engage or disengage at the correct time, leading to a variety of problems depending on the system usage. Switches with alarms are also essential in many types of industrial applications to alert if pressure rises or falls too low within a specific system. Having the right options for replacement parts is essential to keep the pump operating at peak performance.
One of the biggest concerns when selecting a replacement switch is to make sure that it is correctly designed for the specific flow rate within the pump. A flow switch should not be used that are incorrectly calibrated for the flow rate as this can lead to incorrect functioning of the device. All switches are rated in gallons per minute or GPM. The term is fairly easy to understand, the switch operates at the given GPM which can range from as little as 0.1 GPM to up to 48 GPM. Additional higher volume types of switches are typically only used in specialized industrial types of applications such as oil and gas pipeline monitoring.
Besides the gallon per minute rating, these switches can also be rated on the operating velocity range which is measured in FPM or feet per minute. These are often seen in booster pumps and flow protector types of options that will automatically shut down if the flow of the liquid, usually water, drops below a specific volume. This is perfect for protecting pumps against trying to run it dry or if there is not enough water in the system to allow the pump to operate without causing damage to the mechanism. These switches, which can also measure air flow, range in rating from 0-300 fpm to up to 1610 fpm.
Another key consideration in choosing a flow switch is the material of construction. There are a huge number of options with many switches having several different materials depending on the specific part of the switch. In general there are brass and stainless steel switches that are commonly used for measuring the flow of liquids. Polypropylene materials are also used for liquids, typically potable water, and are excellent in heaters, water purifiers, water chlorinators, evaporators, filters and reverse osmosis units. Since they are very lightweight and completely corrosive resistant they are an excellent option for a switch in all types of drinking water systems.
A rotor type flow switch is typically made of a variety of materials. They can include brass, ceramic, PPS composite, polysulfone and Vitron. Typically the body itself is brass, with ceramic and polysulfone exterior. These rotor types of switches are commonly used in highly specialized pumps and systems including semiconductor processing, high-power tubes, robotic welding equipment and even in laser and specialized medical equipment. These types of switches also include filtration of up to 150 microns, ideal for the highly sensitive equipment they are used in.
Choosing the right type of flow switch is essential to the proper operation of the system or systems. As with all replacement parts, it is critical to stay to the pump manufacturers specs and to avoid substituting a part that is not recommended for that specific system. You will also need to carefully check out the operating temperature and rating for the switch, especially if it is used in specialized equipment as opposed to a water filtration or heating system.
About the Author
Sandy Winslow is a writer on many topics, including construction and home improvement. There are many different types of flow switch on the market and knowing what options you have will help you choose the correct switch for the job.
Whats the best non aerating low flow shower head with a on off switch?
I thinking of repacing my 1.25 gpm non aerating shower head that has a stuck on-off switch.
Should I get a 1.00 gpm shower head?
Moen Tp150-home depot-49.95
Switch - Flow
