Variable-Pressure Flow Switches
Accurate even in applications where pressure fluctuates regularly, these flow switches split flow into two paths and measure their difference in pressure drop to calculate the flow rate of liquid. They activate or deactivate equipment when the flow rate reaches your set point. Tighten or loosen the adjustment screw to choose your set point anywhere within the range. They measure accurately no matter their mounting orientation. All are single pole, double throw (SPDT) and can either turn one device from off to on (normally open) or on to off (normally closed). Rated NEMA 4X and IP66, they seal out dust and protect against washdowns and corrosion.
These switches are calibrated with water. They can also be used with other liquids but may not measure accurately if their viscosity is significantly different.
For technical drawings and 3-D models, click on a part number.
| Set Point, gpm | Max. Pressure | Temp. Range, °F | Voltage | Max. Switching Current | Conduit Trade Size | End-to-End Lg. | Each | |
Bronze Body | ||||||||
|---|---|---|---|---|---|---|---|---|
1/4 NPT Female | ||||||||
| 0.3 to 2 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 0000000 |
| 0.4 to 3 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 0.5 to 4 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
1/2 NPT Female | ||||||||
| 0.3 to 2 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 0.4 to 3 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 0.5 to 4 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 0.5 to 6 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 1.5 to 10 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
3/4 NPT Female | ||||||||
| 0.5 to 6 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 1.5 to 10 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 2 to 15 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 3 to 20 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
1 NPT Female | ||||||||
| 2 to 15 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 3 to 20 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 4 to 30 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 5 to 40 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
1 1/2 NPT Female | ||||||||
| 4 to 30 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 5 to 60 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
| 15 to 100 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 1/16" | 00000000 | 000000 |
2 NPT Female | ||||||||
| 5 to 40 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 3/16" | 00000000 | 000000 |
| 15 to 100 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 3/16" | 00000000 | 000000 |
| 30 to 200 | 400 psi @ 70° F | -30° to 212° | 120V AC/ 175V DC | 180 mA @ 120 V AC 250 mA @ 175 V DC | 1/2 | 3 3/16" | 00000000 | 000000 |