The flow switch responds to pressure that the flowing fluid exerts on the fluid paddle. A range adjustment screw adjusts the rate of the flow required to activate the switch. For flow rates, see Table 2 through Table 4. For pressure drop against flow rate, see Figure 3.
The red terminal is the Common. Red to yellow closes on flow increase. Red to blue closes on flow decrease.
| Flow action | Switch closure |
|---|---|
| Increase | Red to yellow |
| Decrease | Red to blue |