Harwil Q-15 Hall Effect Flow Switch, 0.7 to 590 GPM, 3/4 in NPT, 250 psi
SKU PFS-Q-15S/3SM
Harwil Q-15 Hall Effect Flow Switch The most sensitive paddle switch. The Harwil Q-15 is the most sensitive paddle type flow switch Harwil builds. It uses Hall Effect technology programmed for the highest sensitivity, and ships standard with 8 conductor modular cable...
- Flow range
- See model configuration
- Pipe size
- See model configuration
- Body material
- Stainless
Technical information
Description and specifications
Harwil Q-15 Hall Effect Flow Switch
The most sensitive paddle switch.
The Harwil Q-15 is the most sensitive paddle type flow switch Harwil builds. It uses Hall Effect technology programmed for the highest sensitivity, and ships standard with 8 conductor modular cable and a Cat 3 modular connector.
| Flow Range | 0.7 to 590 GPM (2.6 to 2,233 L/m) |
|---|---|
| Working Temperature | 180 F (82 C) maximum |
| Working Pressure | 250 psi |
| Pressure Drop | Typically less than 1.0 psig at normal flow |
| Max Flow | May be five times normal flow |
| Process Connection | 3/4 inch NPT |
|---|---|
| Body Material | Brass (Q-15B) or Stainless (Q-15S) |
| Coupling | Magnetic |
| Sensing | Hall Effect |
|---|---|
| Electrical Contacts | SPNO .25A (250 mA) |
| Cable | 8 conductor modular cable, Cat 3 modular connector standard |
- Brakes and clutches
- Emergency wash-down showers
- Fire sprinkler flow alarms
- Lasers and vacuum systems
- Irrigation, salt and fresh water systems
Brass or stainless?
Q-15B is brass. Q-15S is stainless. Both use the same 3/4 inch NPT process connection.
What makes the Q-15 more sensitive?
It uses Hall Effect sensing with magnetic coupling rather than a mechanical contact, and it is programmed for the highest sensitivity in the Harwil paddle line.