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Product Specifications:
| Connection Size | 1/2" |
| 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) |
| For Pipe Size | 1/2" |
| Height | 4 2/5" |
| Included | Switch |
| Length | 3 4/5" |
| Max. Media Temp. | 225°F |
| Max. Pressure | 100 psi |
| Media Temp. | 32°F to 225°F |
| Min. Ambient Temp. | 32°F |
| Min. Fluid Temp. | 32 F |
| Min. Media Temp. | 32°F |
| Overall Height | 4 2/5" |
| Overall Length | 3.8" |
| Overall Width | 3 4/5" |
| Product Datasheet | mcdonnell-miller-fs1-w.pdf |
| Series | FS1 Series |
| Switch Enclosure | NEMA 1 |
| Switch Type | SPDT |
| Type | Electrically Operated, General Purpose |
| Voltage | 120/240V AC |
| Wetted Material | Brass, EPDM |
| Width | 3 4/5" |
Shipping Info:
| Ship weight (kg) | 1.35 |
| Ship height (cm) | 21.34 |
| Ship length (cm) | 8.64 |
| Ship width (cm) | 7.62 |
| Country of Origin | US |
Documentation:
Product Variants
| Product | Model | Min. Media Temp. | Max. Media Temp. | Housing Material | Media Temp. | Max. Flow Rate | Overall Width | Min. Flow Rate | Overall Height | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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FS7-4 | 32°F | 300°F | Brass | 32°F to 300°F | 4.8 GPM | - | 4.8 GPM | - | €1,185.65 | |
![]() |
AF-1 | 32°F | 300°F | Aluminum | 32°F to 300°F | - | - | - | - | €597.41 | |
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FS4-3 | 32°F | 300°F | Stainless Steel | 32°F to 300°F | 10.2 GPM | 3" | 6 GPM | 8 2/5" | €585.38 | |
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FS8-W | 32°F | 225°F | Stainless Steel | 32°F to 225°F | 17.6 GPM | 3.3" | 4.9 GPM | 8 2/5" | €693.72 | |
![]() |
FS-200-W | 33°F | 250°F | Steel | - | 14.8 GPM | - | - | - | €1,152.49 | |
![]() |
FS-204-W | 33°F | 250°F | Aluminum | - | - | - | - | - | €767.59 | |
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QVE1900U | -40°F | 248°F | Stainless Steel | -4°F to +248°F | 10 GPM | 6 1/5" | 6 GPM | 2 4/5" | €288.91 |
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MCDONNELL & MILLER FS1 113200 Flow Switch, 1/2 Inch SPDT
€960.55 /unit




