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HOLIDAY HOURS: All Brooks Instrument facilities in the USA will be closed December 23, 26, 30 and January 2. For holiday hours of our facilities across the globe, please contact the specific location directly.

Key Instruments Legacy Products

Variable Area Flow Meters (Rotameters)

Key Instruments GS-L Glass Tube Flow Meter

GS-L Series

Glass Tube Variable Area Flow Meters

Download Installation Manual

View Replacement Product

Key Instruments GS-M Glass Tube Flow Meter

GS-M Series

Glass Tube Variable Area Flow Meters

Download Data Sheet

View Replacement Product

Valves