Key Instruments manufactures precision machined acrylic flow meters, molded plastic flow meters, glass tube flow meters, flow control valves, and other products for a wide variety of markets such as medical, industrial, chemical, semiconductor, water, the laboratory, and more

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Flow Meters and Flow Instrumentation

Key flow products have been proven in a variety of markets with diverse performance and regulatory demands including: medical, industrial, chemical, semiconductor, water, the laboratory, and more. Key Instruments partners with each customer to gain a thorough understanding of the environment in which the products will be used, and then works to ensure the products meet the ongoing needs of each unique application.

Key has transferred this application knowledge into the design of numerous standard product platforms.  Each product design specifically includes measures to counteract torque and other stresses that are introduced during the installation process.  Key also recognizes that end users may not always be aware of the physical limits of a product, and thus each design includes safeguards that make it more difficult for limits to be exceeded.

Key Instruments Flow Meters and Flow Instrumentation Products:


  • Variable Area Flow Meters (Rotameters)
  • Pitot Tube Flow Meters
  • Flow Control Valves
  • Air & Oxygen Flow Meter Manifolds
  • Adaptors, Fittings, & Nuts
Key Instruments
250 Andrews Road
Trevose, PA 19053-3491 USA
In USA and Canada: (800) 356-7483
Direct: (215) 357-0893
Fax: (215) 357-9239
Email: sales@KeyInstruments.com
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At Key Instruments, our success is built on recognizing that product manufacturers need more from their flow instrumentation suppliers than simply providing a standard product catalog.  Manufacturers of medical equipment, industrial gas mixing and distribution systems, aquaculture control equipment, gas and liquid analyzers, water handling and treatment skids, and many others continue to partner with us due to our unique ability to drive costs out of the final product. When maintaining a world-class supply chain is critical, premier product manufacturers call Key.