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Product Specifications:
| Item | Flow Switch |
| Connection Size | 1" |
| Connection Type | NPT |
| Contact Rating (ac) | 22.2A @ 240V (Locked Rotor), 3.7A @ 240V (Full Load), 44.4A @ 120V (Locked Rotor), 7.4A @ 120V (Full Load) |
| Fits Brand | Mcdonnell And Miller |
| Flow Rate | 6-10.2 GPM |
| Flow Switch Type | Paddle |
| For Pipe Size | 1" |
| Height | 8 2/5" |
| Housing Material | Stainless Steel |
| Included | (1) Switch, (2) Washers And (1) Screw, (4) Paddles |
| Length | 3 2/5" |
| Max. Ambient Temp. | 32°F |
| Max. Flow Rate | 10.2 GPM |
| Max. Media Temp. | 300°F |
| Max. Pressure | 160 psi |
| Media Temp. | 32°F to 300°F |
| Min. Ambient Temp. | 32°F |
| Min. Flow Rate | 6 GPM |
| Min. Media Temp. | 32°F |
| Overall Height | 8 2/5" |
| Overall Length | 3.4" |
| Overall Width | 3" |
| Product Datasheet | mcdonnell-miller-fs4-3ds.pdf |
| Set Point Configuration | Adjustable |
| Switch Type | SPDT |
| Type | Paddle |
| Voltage | 120/240V AC |
| Wetted Material | Brass, Stainless Steel |
| Width | 3" |
Shipping Info:
| Ship weight (kg) | 0.9 |
| Ship height (cm) | 7.62 |
| Ship length (cm) | 8.64 |
| Ship width (cm) | 21.34 |
| Country of Origin | CN |
Documentation:
Product Variants
| Product | Model | Connection Size | Housing Material | For Pipe Size | Max. Flow Rate | Min. Flow Rate | Switch Enclosure | Min. Ambient Temp. | Max. Pressure | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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FS7-4 | 1 1/4" | Brass | 1 1/4", 16" | 4.8 GPM | 4.8 GPM | NEMA 1 | 32°F | 300 psi | €1,185.65 | |
![]() |
AF-1 | 8" | Aluminum | - | - | - | NEMA 1 | 32°F | - | €597.41 | |
![]() |
FS8-W | 1" | Stainless Steel | 1" | 17.6 GPM | 4.9 GPM | NEMA 4X | 32°F | 160 psi | €693.72 | |
![]() |
FS-200-W | 1" | Steel | - | 14.8 GPM | - | - | - | 160 psi | €1,152.49 | |
![]() |
FS-204-W | 1" | Aluminum | - | - | - | - | - | 160 psi | €767.59 | |
![]() |
FS1 | 1/2" | - | 1/2" | - | - | - | 32°F | 100 psi | €960.55 | |
![]() |
QVE1900U | 1" | Stainless Steel | 1 1/4", 8" | 10 GPM | 6 GPM | NEMA 4 | -4°F | - | €288.91 |
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MCDONNELL & MILLER FS4-3 114400 Flow Switch 1 Inch SPDT
€585.38 /unit




