Fixed-Setpoint Hazardous Location Flow Switches
Safe to use where flammable gases and combustible dust may be present, these switches activate or deactivate when your flow reaches a factory-set level. All are UL listed for hazardous environments. Because their set point is fixed, they’re ready to go, making them easy to install. They actuate when your flowing liquid or gas pushes their paddle into a set position. These switches are single pole, double throw (SPDT) and can turn one device from off to on (normally open) or from on to off (normally closed). They must be mounted horizontally to function accurately.
These switches are calibrated with water and air. They can also be used with other liquids and gases 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 | Conduit | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Thread Type | Gender | For Liquids, gpm | For Gases, scfm | Max. Pressure | Temp. Range, °F | Voltage | Max. Switching Current | Trade Size | Thread Type | Gender | End-to-End Lg. | Each | |
Brass Body | ||||||||||||||
| 1/2 | NPT | Female | 1.5 | 6.5 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 1/4" | 00000000 | 0000000 |
| 3/4 | NPT | Female | 2 | 10 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 3/8" | 00000000 | 000000 |
| 1 | NPT | Female | 3 | 14 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 1/2" | 00000000 | 000000 |
| 1 1/4 | NPT | Female | 4 | 21 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 5/8" | 00000000 | 000000 |
| 1 1/2 | NPT | Female | 6 | 33 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 7/8" | 00000000 | 000000 |
| 2 | NPT | Female | 10 | 43 | 250 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 3" | 00000000 | 000000 |
304 Stainless Steel Body | ||||||||||||||
| 1/2 | NPT | Female | 1.5 | 6.5 | 2000 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 1/4" | 00000000 | 000000 |
| 3/4 | NPT | Female | 2 | 10 | 2000 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 2 5/8" | 00000000 | 000000 |
| 1 | NPT | Female | 3 | 14 | 2000 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 3" | 00000000 | 000000 |
| 2 | NPT | Female | 10 | 43 | 2000 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 4 3/4" | 00000000 | 00000000 |
Hazardous Location Flow Switches
UL listed for use where flammable gases or combustible dusts may be present, these flow switches activate or deactivate equipment when your flow rate reaches a set point. Use the adjustment screw to select their set point. They actuate when your flowing liquid or gas pushes their paddle into a certain position determined by the set point. 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). Mount them horizontally. Rated NEMA 4, they also protect against weather and washdowns.
These flow switches are calibrated with water and air. You can use them with other liquids and gases, but they may not measure accurately if the viscosity is different from water or air.
For technical drawings and 3-D models, click on a part number.
Set Point | Conduit | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Type | Gender | For Liquids, gpm | For Gases, scfm | Max. Pressure | Temp. Range, °F | Voltage | Max. Switching Current | Trade Size | Thread Type | Gender | End-to-End Lg. | Each | |
Brass Body | ||||||||||||||
| 1/2 | NPT | Female | 0.04 to 0.75 | 0.18 to 2.7 | 1450 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 3 5/8" | 00000000 | 0000000 |
304 Stainless Steel Body | ||||||||||||||
| 1/2 | NPT | Female | 0.04 to 0.75 | 0.18 to 2.7 | 1450 psi @ 70° F | -4° to 220° | 120V AC/ 240V AC | 5 A @ 120 V AC | 3/4 | NPT | Male | 3 5/8" | 00000000 | 000000 |
Hazardous Location Insertion Flow Switches
Safely activate and deactivate equipment in environments with flammable gases and combustible dust when your flow rate reaches a set point. They are UL listed and CSA certified for use in hazardous locations. These switches save you from disassembling your pipeline because you insert them into pipe tees or pipe outlets instead of mounting them inline. They actuate when your system’s liquid pushes the paddle into a set position. To change your set point, the paddle has multiple layers that you can remove. For the lowest set point, use the largest paddle that will fit your pipe. To increase your set point, loosen the locking washers and remove paddles. You can trim the paddles to fine-tune your set point. The smaller the paddle, the higher the setpoint.
They should be mounted vertically into a horizontal pipeline, so liquid pushes the paddle.
These switches are calibrated with water and air. They can also be used with other liquids and gases but may not measure accurately if their viscosity is significantly different.
SPDT (singe pole, double throw) switches can turn one device from off to on (normally open) or from on to off (normally closed).
DPDT (double pole, double throw) switches can either turn two devices from off to on (normally open) or on to off (normally closed).
For technical drawings and 3-D models, click on a part number.
Set Point Range | Max. Flow Rate | Conduit | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Thread Type | Gender | For Pipe Size | For Water and Oil, gpm | For Air and Inert Gas, scfm | For Water and Oil, gpm | For Air and Inert Gas | Max. Pressure | Temp. Range, °F | Max. Switching Current @ Voltage | Trade Size | Thread Type | Gender | Body Ht. | Each | |
SPDT | ||||||||||||||||
Brass Body | ||||||||||||||||
| 1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 1000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 0000000 |
316 Stainless Steel Body | ||||||||||||||||
| 1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 2000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 00000000 |
DPDT | ||||||||||||||||
Brass Body | ||||||||||||||||
| 1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 1000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 000000 |
316 Stainless Steel Body | ||||||||||||||||
| 1 1/2 | NPT | Male | 1 1/2 2 4 12 20 | 3 to 7 4 to 15 12 to 95 140 to 900 400 to 2,400 | 17 to 32 13 to 65 50 to 400 800 to 3,450 2,850 to 10,000 | 55 97 391 3,525 9,792 | Not Rated | 2000 psi @ 70° F | -4° to 275° | 5 A @ 125 V AC 5 A @ 250 V AC | 3/4 | NPT | Female | 8" | 00000000 | 00000000 |