Operation - PENN Controls - F261KEH - F261KFH - F261MEH - F261MFH - Flow, Liquid Level, and Air‐Volume Control - F261 Fluid Flow Switch

F261 Series Flow Switches Installation Guide

PENN Controls
Product name
F261 Fluid Flow Switch
Document type
Installation Guide
Part number
Document revision
Revision date

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.

Table 1. F261 control switch action
Flow action Switch closure
Increase Red to yellow
Decrease Red to blue