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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Key Instruments: ?Your Key to Flowmeter Manufacturing


Key Instruments is your high quality manufacturer of standard and custom flowmeters. We strive to provide the best value in flow instrumentation. When you need a custom flow solution but have neither the time nor the resources, rely on Key Instruments.

Flowmeter Manufacturer: ?Flowmeters to Meet Your Needs

Key Instruments designs, manufactures, and delivers high quality flowmeters on-time and on-budget to exact customer specifications. We manufacture air flow meters and water flow meters to serve the following industries: medical, water, industrial, chemical, process control, laboratory, and more.

The industries served reflect our range of expertise in the manufacture of precision flowmeters for numerous applications. Key Instruments aims to exceed the expectations of customers in every one of those applications. We do more than provide exceptional service and high quality: we provide innovative flow solutions. Our FDA “Good Manufacturing Practices” compliance and NIST traceable flow calibration certification for air flow meters, water flow meters, and gas flow meters further reflect our quality philosophy.

Exceeding Expectation in Flow Meter ?Engineering and Manufacturing

At Key Instruments, our purpose is to manufacture exceptional flow meters at the best possible price. Our mission is to exceed your expectations. We manufacture to exact specifications and deliver high quality flow meters at a competitive cost and on time. No manufacturer should do any less.

After punctual delivery, Key Instruments looks at the engineering, manufacturing, and delivery processes to maintain our Continuous Improvement Program. We strive to make sure our customers are always satisfied by understanding what we did and what we can do better. Customers who choose Key Instruments know they are choosing a process that has been continuously refined.

The Key Instruments Mission: ?manufacture, deliver, learn.??

Manufacture high quality, ?competitively-priced flow meters.??

Deliver on-time, every time.??

Learn from the process to continually improve.

The One-Stop Flow Meter Shop


The experts at Key Instruments engineer and manufacture high quality custom flow meters, rotameters, and other engineered products. Through precision machining, rapid prototyping, careful assembly, and rigorous testing of pneumatic subsystems, we take pride in providing exactly what you need.

If you need a superior flow solution but cannot spare the time and resources to design your own, trust the experts at Key Instruments. Our efficient process decreases cost and shortens production time.
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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.