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Flow switches detect fluid flow in hydraulic systems and prevent leaks. They are used in pumps in the water treatment, oil & gas and chemical industries.
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B| Style | Model | Housing Material | Connection Size | For Pipe Size | Enclosure Rating | Switch Type | Connection Type | Min. Flow Rate | Max. Flow Rate | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | F261MEH-V01C | Plastic, Stainless Steel | 1/2" | 1/2" | NEMA 4 | SPDT | FNPT | 0.6 GPM | 17 GPM | £472.35 | |
| B | F261KFH-V01C | Stainless Steel | 3/4" | 3/4" | NEMA 3R | SPDT | FNPT | 0.6 GPM | 17 GPM | £311.03 | |
| A | F261KEH-V01C | Stainless Steel | 1/2" | 1/2" | NEMA 3R | SPDT | FNPT | 0.6 GPM | 17 GPM | £255.34 | |
| A | F261MFH-V01C | Stainless Steel | 3/4" | 3/4" | NEMA 4 | SPDT | FNPT | 0.6 GPM | 17 GPM | £482.59 | |
| A | F261KFH-V02C | Stainless Steel | 3/4" | 3/4" | NEMA 3R | SPDT | FNPT | 0.6 GPM | 17 GPM | £266.42 |
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C| Style | Model | Switch Type | Connection Type | Min. Flow Rate | Max. Flow Rate | Min. Ambient Temp. | Max. Pressure | Media Temp. Range | Max. Ambient Temp. | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS-380P 209876 | SPST | NPT | 0 GPM | 0.15 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £108.73 | |
| B | FS-380 168433 | SPST | NPT | 0 GPM | 0.5 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £215.05 | |
| A | FS-380P 197084 | SPST | NPT | 1 GPM | 1.5 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £108.73 | |
| B | FS-380 181130 | SPST | NPT | 0 GPM | 0.15 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £233.26 | |
| B | FS-380 168432 | SPST | NPT | 0 GPM | 0.25 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £218.18 | |
| C | FS-380 179992 | SPST | NPT | 0 GPM | 0.25 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £591.57 | |
| C | FS-380 193482 | SPST | NPT | 0 GPM | 0.15 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £571.10 | |
| A | FS-380P 197083 | SPST | NPT | 0 GPM | 1 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £115.61 | |
| C | FS-380 179996 | SPST, Normally Open | NPT | 1 GPM | 2 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £565.39 | |
| C | FS-380 179993 | SPST, Normally Open | MNPT | - | - | -20°F | 1500 psi | -20°F to +275°F | 275°F | £509.18 | |
| B | FS-380 168434 | SPST, Normally Open | NPT | 0 GPM | 1 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £220.91 | |
| A | FS-380P 197081 | SPST, Normally Open | NPT | 0 GPM | 0.25 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £108.73 | |
| A | FS-380P 197085 | SPST, Normally Open | NPT | 1 GPM | 2 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £115.61 | |
| A | FS-380P 197082 | SPST, Normally Open | NPT | 0 GPM | 0.5 GPM | 0°F | 125 psi | 0°F to +212°F | 212°F | £108.73 | |
| C | FS-380 179995 | SPST, Normally Open | NPT | 1 GPM | 5 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £539.48 | |
| B | FS-380 178353 | SPST, Normally Open | NPT | 1 GPM | 2 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £233.26 | |
| B | FS-380 168435 | SPST, Normally Open | NPT | 1 GPM | 1.5 GPM | -20°F | 1500 psi | -20°F to +275°F | 275°F | £233.26 |
McDonnell & Miller FS6 liquid flow switches are designed to monitor the flow of liquids, such as water or oil, in pipes and systems. These liquid flow switches are highly sensitive and used in cooling systems, booster pumps, water treatment systems and compressors. They have a sealed compartment that protects the switch from liquids and a sensitivity adjustment screw to prevent false tripping of the flow switch. These liquid flow switches serve as a crucial safeguard, preventing damage and potential hazards caused by insufficient or excess liquid flow. They can be operated at temperatures ranging from 32 to 225 degrees F and can withstand pressures up to 100 psi. These liquid flow switches are integrated with an SPDT switch for monitoring the direction of liquid flow.
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C| Style | Model | Switch Type | Connection Size | Max. Flow Rate | For Pipe Size | Enclosure Rating | Connection Type | Min. Flow Rate | Min. Ambient Temp. | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS6-1 | SPDT | 1" | 0.12 GPM | 1" | NEMA 1 | NPT | 0.12 GPM | 32°F | £840.84 | |
| A | FS6-W-3/4 | SPDT | 3/4" | 0.12 GPM | 3/4" | NEMA 4-X | NPT | 0.12 GPM | 32°F | £882.80 | |
| A | FS6-3/4 | SPDT | 3/4" | 0.12 GPM | 3/4" | NEMA 1 | NPT | 0.12 GPM | 32°F | £904.60 | |
| B | FS6-W-1 | SPDT | 1" | 0.12 GPM | 1" | NEMA 4X | NPT | 0.12 GPM | 32°F | £960.33 | |
| C | FS6 | SPDT Snap Switch | 3/4", 1" | 50 GPM | - | NEMA 1 | NPT | - | 32°F | - | RFQ
|
AB| Style | Model | Housing Material | Voltage | Enclosure Rating | Switch Type | Connection Size | Connection Type | For Pipe Size | Min. Flow Rate | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | F261MAH-V01C | Stainless Steel | 24-230V | NEMA 4 | SPDT | 1" | NPT | 1", 2", 3", 6" | 2.5 GPM | £361.76 | |
| B | F261KAH-V01C | Stainless Steel | 24-230V | NEMA 3R | SPDT | 1" | NPT | 1", 2", 3", 6" | 2.5 GPM | £293.60 | |
| B | F261MAL-V01C | Stainless Steel | 4-120V | NEMA 4 | SPDT | 1" | NPT | 1", 2", 3", 6" | 2.5 GPM | £429.79 |
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H| Style | Model | Housing Material | Connection Size | Connection Type | For Pipe Size | Min. Flow Rate | Max. Flow Rate | Switch Enclosure | Max. Pressure | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS1 | - | 1/2" | NPT | 1/2" | - | - | - | 100 psi | £598.39 | |
| B | AF-1 | Aluminum | 8" | - | - | - | - | - | - | £474.12 | |
| C | FS-204-W | Aluminum | 1" | NPT | - | - | - | - | 160 psi | £790.85 | |
| D | FS7-4 | Brass | 1 1/4" | NPT | 1 1/4", 16" | 4.8 GPM | 4.8 GPM | - | 300 psi | £869.58 | |
| E | FS4-3 | Stainless Steel | 1" | NPT | 1" | 6 GPM | 10.2 GPM | - | 160 psi | £224.48 | |
| F | FS8-W | Stainless Steel | 1" | NPT | 1" | 4.9 GPM | 17.6 GPM | NEMA 4X | 160 psi | £458.44 | |
| G | QVE1900U | Stainless Steel | - | MNPT | - | 6 GPM | - | NEMA 4 | 160 psi | £222.72 | |
| H | FS-200-W | Steel | 1" | NPT | - | - | 14.8 GPM | - | 160 psi | £655.97 |
AB| Style | Model | Housing Material | Switch Type | Connection Size | For Pipe Size | Max. Pressure | Enclosure Rating | Connection Type | Min. Flow Rate | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS5-3/4 | Brass | SPDT | 3/4" | 3/4" | 150 psi | NEMA 1 | NPT | 1.5 GPM | £526.48 | |
| A | FS5-1 | Brass | SPDT | 1" | 1" | 150 psi | General Purpose | NPT | 1.5 GPM | £557.79 | |
| B | FS5 | Stainless Steel | SPDT Snap Switch | 3/4" | - | 1500 psi | NEMA 1 | NPT | - | - | RFQ
|
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D| Style | Model | Switch Type | Min. Ambient Temp. | Max. Pressure | Media Temp. Range | Enclosure Rating | Housing Material | Connection Size | Connection Type | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS7-4E | SPDT | 32°F | 300 psi | +32°F to +300°F | NEMA 7, 9 | Brass | 1 1/4" | NPT | £1,220.02 | |
| B | FS7-4SW | SPDT | -65°F | 1000 psi | -65°F to +300°F | NEMA 4X | Brass | 1 1/4" | NPT | £1,808.58 | |
| C | FS7-4S | SPDT | 32°F | 1000 psi | +32°F to +300°F | NEMA 1 | Brass | 1 1/4" | NPT | £1,552.12 | |
| D | FS7-4W | SPDT Snap Switch | -65°F | 300 psi | -65°F to +300°F | NEMA 4X | Brass | 1 1/4" | NPT | £1,052.50 |
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F| Style | Model | Connection Size | Connection Type | Min. Flow Rate | Max. Flow Rate | Min. Ambient Temp. | Max. Pressure | Media Temp. Range | Max. Ambient Temp. | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | RFS 181688 | 1" | FNPT | 8 GPM | 60 GPM | -20°F | 200 psi | -20°F to +212°F | 150°F | £582.25 | |
| B | FS-200 26838 | 1" | FNPT | 2 GPM | 8 GPM | -20°F | 400 psi | -20°F to +200°F | 200°F | £432.67 | |
| C | FS-550 29609 | 1" | NPT | 15 GPM | 52 GPM | -30°F | 2000 psi | -30°F to +300°F | 300°F | £451.66 | |
| B | FS-200 26615 | 1" | FNPT | 1 GPM | 6 GPM | -20°F | 400 psi | -20°F to +200°F | 200°F | £432.67 | |
| B | FS-200 26616 | 1" | FNPT | 5 GPM | 15 GPM | -20°F | 400 psi | -20°F to +200°F | 200°F | £455.86 | |
| D | FS-550 29608 | 1" | NPT | 15 GPM | 52 GPM | -30°F | 2000 psi | -30°F to +300°F | 300°F | £691.24 | |
| A | RFS 156268 | 1/2" | FNPT | 4 GPM | 20 GPM | -20°F | 200 psi | -20°F to +212°F | 150°F | £560.38 | |
| E | FS-10798 25364 | 1/2" | FNPT | 0.5 GPM | 20 GPM | -20°F | 1000 psi | -20°F to +300°F | 300°F | £1,356.74 | |
| A | RFS 155485 | 1/2" | FNPT | 4 GPM | 20 GPM | -20°F | 100 psi | -20°F to +180°F | 150°F | £425.66 | |
| A | RFS 155425 | 1/4" | FNPT | 0.5 GPM | 5 GPM | -20°F | 100 psi | -20°F to +180°F | 150°F | £424.56 | |
| A | RFS 156265 | 1/4" | FNPT | 0.5 GPM | 5 GPM | -20°F | 200 psi | -20°F to +212°F | 150°F | £575.84 | |
| A | RFS 180395 | 3/4" | FNPT | 5 GPM | 30 GPM | -20°F | 200 psi | -20°F to +212°F | 150°F | £544.50 | |
| F | FS-400 26600 | 3/4" | FNPT | 0.75 GPM | 4 GPM | -20°F | 400 psi | -20°F to +180°F | 180°F | £428.12 | |
| F | FS-400 26601 | 3/4" | FNPT | 2 GPM | 8 GPM | -20°F | 400 psi | -20°F to +180°F | 180°F | £443.07 | |
| F | FS-400 26602 | 3/4" | FNPT | 7 GPM | 14 GPM | -20°F | 400 psi | -20°F to +180°F | 180°F | £420.53 |
A| Style | Model | Housing Material | Switch Type | Connection Size | Connection Type | Min. Flow Rate | Max. Flow Rate | Min. Ambient Temp. | Max. Pressure | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS-10798 25365 | Brass | SPDT | 1/2" | FNPT | 0.5 GPM | 20 GPM | -20°F | 1000 psi | £841.22 | |
| A | FS-10798 25366 | Epoxy, Stainless Steel, Viton | SPDT | 1/2" | FNPT | 0.5 GPM | 20 GPM | -20°F | 1000 psi | £1,352.09 |
A| Style | Model | Min. Flow Rate | Max. Flow Rate | Switch Type | Switch Position | Connection Size | Connection Type | Min. Ambient Temp. | Max. Pressure | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS-500 170233 | 0 GPM | 1 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £152.01 | |
| A | FS-500 170231 | 0 GPM | 0.25 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £691.24 | |
| A | FS-500 170232 | 0 GPM | 0.5 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £154.80 | |
| A | FS-500 170235 | 1 GPM | 5 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £154.80 | |
| A | FS-500 175117 | 1 GPM | 2 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £152.16 | |
| A | FS-500 170234 | 1 GPM | 2.5 GPM | SPST | Normally Open | 3/4" | FNPT | 0°F | 100 psi | £154.80 |
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E| Style | Model | Housing Material | Connection Size | Switch Type | For Pipe Size | Tee Connection Size | Overall Height | Overall Width | Material Of Construction | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | V8 | - | 1" | SPDT | - | - | 1 4/5" | 1 4/5" | Stainless Steel | £177.24 | |
| B | V8-WP | - | 1" | SPDT | - | - | 1 4/5" | 1 4/5" | Stainless Steel | £245.85 | |
| C | V7-WBS-30N | Aluminum | 1" | SPDT | 1" to 4" | - | 7" | 7" | Stainless Steel | £208.54 | |
| D | V6EPB-B-S-4-MI | Brass | 1 1/4" | SPDT | - | 1 1/4" | 4 4/5" | 3 3/5" | Brass | £591.03 | |
| D | V6EPB-B-S-3-MI | Brass | 1" | SPDT | - | 1" | 4 4/5" | 3 3/5" | Brass | £595.39 | |
| D | V6EPB-B-S-6-MI | Brass | 2" | SPDT | - | 2" | 4 4/5" | 3 3/5" | Brass | £901.05 | |
| D | V6EPB-B-S-4-B | Brass | - | SPDT | - | 1 1/4" | - | - | - | £553.51 | |
| D | V6EPB-B-S-6-B | Brass | - | SPDT | - | 2" | 4 4/5" | 3 3/5" | Brass | £837.08 | |
| D | V6EPB-B-D-2-MI | Brass | 3/4" | DPDT | - | 3/4" | 4 4/5" | 3 3/5" | Brass | £568.85 | |
| D | V6EPB-B-D-LF | Brass | 1/2" | DPDT | - | 1/2" | 4 4/5" | 3 3/5" | Brass | £732.67 | |
| D | V6EPB-B-S-5-B | Brass | 1 1/2" | SPDT | - | 1 1/2" | 4 4/5" | 3 3/5" | Brass | £699.77 | |
| E | V4-2-D-U | Brass | 1 1/2" | DPDT | 1 1/2" | - | 3.3" | 3.3" | Stainless Steel | £1,019.35 | |
| D | V6EPB-B-S-5-MI | Brass | 1 1/2" | SPDT | - | 1 1/2" | 4 4/5" | 3 3/5" | Brass | £654.53 | |
| D | V6EPB-B-D-5-B | Brass | 1 1/2" | DPDT | - | 1 1/2" | 4 4/5" | 3 3/5" | Brass | £733.27 | |
| D | V6EPB-B-D-6-0 | Brass | 2" | DPDT | - | 2" | 4 4/5" | 3 3/5" | Brass | £492.06 | |
| D | V6EPB-B-S-1-B | Brass | - | SPDT | - | 1/2" | - | - | - | £424.10 | |
| D | V6EPB-B-D-3-B | Brass | 1" | DPDT | - | 1" | 4 4/5" | 3 3/5" | Brass | £577.73 | |
| D | V6EPB-B-S-2-B | Brass | - | SPDT | - | 3/4" | - | - | - | £442.32 | |
| D | V6EPB-B-S-6-0 | Brass | - | SPDT | - | 2" | - | - | - | £404.18 | |
| D | V6EPB-B-D-4-MI | Brass | 1 1/4" | DPDT | - | 1 1/4" | 4 4/5" | 3 3/5" | Brass | £709.91 | |
| D | V6EPB-B-S-1-MI | Brass | 1/2" | SPDT | - | 1/2" | 4 4/5" | 3 3/5" | Brass | £414.90 | |
| D | V6EPB-B-D-1-B | Brass | 1/2" | DPDT | - | 1/2" | 4 4/5" | 3 3/5" | Brass | £502.53 | |
| D | V6EPB-B-D-1-MI | Brass | 1/2" | DPDT | - | 1/2" | 4 4/5" | 3 3/5" | Brass | £546.09 | |
| D | V6EPB-B-D-6-MI | Brass | 2" | DPDT | - | 2" | 4 4/5" | 3 3/5" | Brass | £1,005.71 | |
| D | V6EPB-B-S-3-B | Brass | - | SPDT | - | 1" | - | - | - | £491.97 |
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J| Style | Model | Connection Size | For Pipe Size | Min. Flow Rate | Max. Flow Rate | Housing Material | Switch Enclosure | Media Temp. Range | Overall Height | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | FS7-4SE | 1 1/4" | 1 1/4" | 4.8 GPM | 7.7 GPM | Brass | NEMA 7/9 | +32°F to +300°F | 13 4/5" | £2,463.88 | |
| B | FS7-4D | 1 1/4" | 1 1/4" | 4.8 GPM | 7.7 GPM | Stainless Steel | - | +32°F to +300°F | 13 3/5" | £1,170.08 | |
| C | FS4-3DS | 1" | 1" | 6 GPM | 10.2 GPM | - | - | 32°F | 8 2/5" | £1,599.69 | |
| D | FS4-3RP-T | 1" | 1" | 6 GPM | 10.2 GPM | - | - | +32°F to +300°F | 8 2/5" | £534.05 | |
| E | FS4-3T3-1 | 1" | 1" | 2 GPM | 4.5 GPM | - | - | 32°F | 6.9" | £791.52 | |
| C | FS4-3S | 1" | 1" | 6 GPM | 10.2 GPM | Stainless Steel | - | +32°F to +300°F | 8 2/5" | £1,077.23 | |
| F | FS4-3D | 1" | 1" | 6 GPM | 10.2 GPM | - | - | +32°F to +300°F | 8 2/5" | £628.72 | |
| G | FS8-WJ | 1" | 1" | 4.9 GPM | 17.6 GPM | - | NEMA 4X | +32°F to +225°F | 8 2/5" | £516.56 | |
| H | FS5-D-3/4 | 3/4" | 3/4" | 1.5 GPM | 15 GPM | Brass | - | 32°F | 5.1" | £904.35 | |
| I | FS4-3T1-3/4 | 3/4" | 3/4" | 5 GPM | 11.5 GPM | - | - | 32°F | 6.9" | £714.29 | |
| J | FS4-3T3-3/4 | 3/4" | 3/4" | 2 GPM | 4.5 GPM | - | - | 32°F | 6.9" | £677.00 |
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B| Style | Model | MPN | Price (inc. VAT) | |
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| A | FSD1-AP-26H | FSD1-AP-26H | £337.53 | |
| B | FSD75-AP-6H | FSD75-AP-6H | £280.04 |
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A| Style | Model | Connection Size | Min. Flow Rate | Max. Flow Rate | Min. Ambient Temp. | Overall Width | Housing Material | Switch Type | Switch Position | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 230500-4-20 | 1 1/2" | 1 GPM | 3.86 GPM | -14° | - | Stainless Steel | SPST | Normally Open | £693.19 | |
| A | 230500-3-20 | 1" | 1 GPM | 1.65 GPM | -14° | 1 1/2" | Stainless Steel | SPST | Normally Open | £693.19 | |
| A | 230500-1-20 | 1/2" | 0 GPM | 0.46 GPM | -14° | 1.1" | Stainless Steel | SPST | Normally Open | £673.42 | |
| A | 230500-2-20 | 3/4" | 1 GPM | 1.01 GPM | -14°F | 1 1/2" | Stainless Steel | SPST | Normally Open | £693.19 |
AB
C| Style | Model | Housing Material | Switch Type | Max. Ambient Temp. | Operating Velocity Range | Connection Size | Connection Type | For Pipe Size | Max. Flow Rate | Price (inc. VAT) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | AFE-1 | Aluminum | SPDT | 275°F | 350-1900 FPM | 1/2" | NPT | 1/2" | 1950 GPM | £2,217.82 | |
| B | AF2 | Aluminum, Brass, Steel | SPDT Snap Switch | 300°F | 380-1250 FPM | - | - | - | - | - | RFQ
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| C | AF3 | Aluminum, Brass, Steel | SPDT Snap Switch | 275°F | 235-1445 FPM | - | - | - | - | £415.46 |
Flow switches are primarily designed to monitor the air, steam or liquid flow and send signals to the pump for automatic ON / OFF switching with the rise and fall of water level; ideal for regulating water cooling equipment and water treatment or hydronic heating systems. Raptor Supplies offers a wide range of these liquid flow switches from brands like Bradley, Dwyer Instruments, Mcdonnell & Miller, Dayton, Johnson Controls, Gems Sensors and Taco. Gems Sensors flow switches uses 100-micron filtration technology and are less susceptible to clogging than other high-pressure inline flow switches. These units come equipped with one-piece magnetic composite piston which actuates the sealed reed switch when displaced by the pressure difference in fluid flow, thereby activating remote alarms or indicators. They are available in brass, polypropylene and stainless steel construction with a maximum pressure rating and flow rate of 1500 psi and 2 GPM, respectively. Taco industrial flow switches feature flow sensitivity adjustment mechanism for setting a wide adjustment range to start or stop an electronically operated device when flow / no-flow condition occurs. These low-flow switches come with a highly malleable EPDM seal providing anti-hardening, cracking and leakage properties and improving the performance in high-pressure applications such as chillers, boilers, heating systems and water systems. They are available in NEMA 1 and NEMA 4 rated enclosures providing protection against the ingress of foreign contaminants and are ideal for use with 1 - 8 inch (outer diameter) pipe sizes.
A flow switch measures the flow rate of media flowing through a process line, whereas a pressure switch measures the pressure within a process line, pipe or vessel.
Consider factors like the type of fluid, flow rate, operating conditions (temperature or pressure) and pipe size.
These flow switches require minimal maintenance. However, periodic inspection and cleaning are necessary to ensure proper functioning.
Yes, these flow switches can be used to detect the flow of both liquids and gases.