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Product Specifications:
| Item | Liquid Flow Switch |
| Application | Used In HVAC Installations To Monitor The Flow Of Fluids In Hydronic Heating And Cooling Systems |
| Connection Size | 1" |
| Connection Type | NPT |
| Contact Rating | 15A |
| Contact Rating (ac) | 15A @ 24V |
| Dc Contact Rating | 15A (8A Inductive) @ 24V AC |
| Flow Rate - Maximum | 10 GPM |
| Flow Rate - Minimum | 6 GPM |
| Flow Rate Range | 6-10 GPM |
| Flow Switch Type | Paddle |
| For Pipe Size | 1 1/4", 8" |
| For Use With | Boilers And Heat Exchangers, Condensers |
| Housing Material | Stainless Steel |
| Housing/body Material | Stainless Steel |
| Material Of Construction | Brass, Stainless Steel |
| Max. Ambient Temp. | 185°F |
| Max. Operating Velocity | 10 FPM |
| Max. Operating Velocity (fpm) | 10 FPM |
| Media Temperature (maximum) | 248°F |
| Media Temperature (minimum) | -4°F |
| Media Temperature Range | -4°F to +248°F |
| Min. Ambient Temp. | -4°F |
| Min. Flow Rate | 6 GPM |
| Min. Flow Rate (gpm) | 6 GPM |
| Min. Fluid Temp. | -40°F |
| Min. Media Temp. | -40°F |
| Overall Height | 2 4/5" |
| Overall Length | 7.4" |
| Overall Width | 6 1/5" |
| Phase | Single |
| Set Point Configuration | Adjustable |
| Switch Enclosure | NEMA 4 |
| Switch Position | Normally Closed |
| Switch Type | SPDT |
| Type | Paddle |
| Voltage | 24V DC |
| Wetted Material | Brass |
| Wetted Materials | Brass |
Shipping Info:
| Ship weight (kg) | 0.68 |
| Ship height (cm) | 7.11 |
| Ship length (cm) | 18.8 |
| Ship width (cm) | 15.75 |
| Country of Origin | DE |
Product Variants
| Product | Model | Connection Size | Housing Material | For Pipe Size | Min. Flow Rate | Max. Flow Rate | Switch Enclosure | Max. Pressure | Media Temp. Range | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|
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FS-200-W | 1" | Steel | - | - | 14.8 GPM | - | 160 psi | - | €1,152.49 | |
![]() |
FS-204-W | 1" | Aluminum | - | - | - | - | 160 psi | - | €767.59 | |
![]() |
FS7-4 | 1 1/4" | Brass | 1 1/4", 16" | 4.8 GPM | 4.8 GPM | NEMA 1 | 300 psi | 32°F to 300°F | €1,066.83 | |
![]() |
AF-1 | 8" | Aluminum | - | - | - | NEMA 1 | - | 32°F to 300°F | €597.41 | |
![]() |
FS4-3 | 1" | Stainless Steel | 1" | 6 GPM | 10.2 GPM | - | 160 psi | 32°F to 300°F | €590.62 | |
![]() |
FS8-W | 1" | Stainless Steel | 1" | 4.9 GPM | 17.6 GPM | NEMA 4X | 160 psi | 32°F to 225°F | €634.65 | |
![]() |
FS1 | 1/2" | - | 1/2" | - | - | - | 100 psi | 32°F to 225°F | €960.55 |
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SIEMENS QVE1900U Liquid Flow Switch, 1 MNPT Connection Size, 10, 160 psi Max. Pressure, 24V DC
€288.91 /unit




