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Gems® 26443 general purpose flow switch is part of the FS-400 series family. They have a 90° flow path and provide accurate flow detection in water and oil with 1% repeatability. Flow settings for fixed version are calibrated using water at +70°F on increasing flow, with units in a vertical position (lead wires up). The FS-400 switches are ruggedly constructed of non-corrosive materials and resist shock and vibration. Suitable for triggering alarms on interlocking shutdown circuitry when flow rate is improper to protect bearings, gears, and cooling systems.