Flow switch with flow indicator
501 McMillan

McMillan Model 501 FLO-SWITCHES are capable of measuring extremely low liquid flow rates from 13 mL/minute up to 10 L/minute with a full scale accuracy of ±1.0% or better!

A wide variety of fluids may be measured. Repeatable results are achieved using a patented Pelton-type microturbine wheel. This proven design has been providing precision results since 1988 and has developed a well deserved reputation for continuous operational service for many years without failure.

Because of the compact size and economical cost of these products, the Model 501 FLO-SWITCHES are suitable for a wide variety of industrial, commercial, laboratory and O.E.M. applications. Some sample applications
include high/low alarms for hydrocarbon fluids, fuels, light oils, solvents, coolant, pesticides, mild acids, alkalis, and deionized water. Either plastic or metal construction may be selected.