McMillan”s Model 501 FLO-SWITCH provides a solid-state relay output indicated flow above or below a selected setpoint. Provides alarms for low- or no-flow conditions, excessive flow, or intermittent flowrates. Low-cost and compact packaging allow usage in laboratory and OEM applications where equipment may be damaged if flowrates are low or not present. Switches are available in plastic or stainless-steel construction. Solid state relay outputs with setpoints as low as 13 mLpm provide a cost-effective replacement to nonrepeatable, piston-type or rotameter-based alternatives. Integrated visual indicators display current status. Units may be used with pressures up to 500 PSIG.