Products
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Key InstrumentsKey Instruments
Key Instruments is a high quality manufacturer of standard and custom flowmeters.
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Key InstrumentsKey Instruments Variable Area Meters
Key Instruments, the leading flow meter manufacturer and rotameter manufacturer, provides customers with the liquid, gas, and air flow instrumentation solutions that help their products and systems run accurately, reliably, and efficiently. Based on the specific needs and requirements of your industry, our instrumentation technicians can design, manufacture, and assemble flow meters for stable, long-lasting flow measurement results.
Variable Area MetersVisit Website
Key InstrumentsKey Instruments Electronic Products
Key Instruments, the leading flow meter manufacturer and rotameter manufacturer, provides customers with the liquid, gas, and air flow instrumentation solutions that help their products and systems run accurately, reliably, and efficiently. Based on the specific needs and requirements of your industry, our instrumentation technicians can design, manufacture, and assemble flow meters for stable, long-lasting flow measurement results.
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Key InstrumentsKey Instruments E-Z Check Calibration Kits
Key Instruments, the leading flow meter manufacturer and rotameter manufacturer, provides customers with the liquid, gas, and air flow instrumentation solutions that help their products and systems run accurately, reliably, and efficiently. Based on the specific needs and requirements of your industry, our instrumentation technicians can design, manufacture, and assemble flow meters for stable, long-lasting flow measurement results.
E-Z Check Calibration KitsVisit Website
Key InstrumentsKey Instruments Sight Flow Indicators
The Mechanical Flow Indicators for liquids and gases, include a rotor for quantitative flow indication in a special glass or acrylic tube housing. They offer 360 degree rotor viewing and may be installed in any orientation. They feature a dual wiper cleaning mechanism for the internal surface of the sight tube. The internal colored rotor spins proportional to flow rates and indicates intermittent or loss of liquid or gas flow. The flow indicator's rugged design is available in brass and stainless steel.
Sight Flow IndicatorsView Data SheetSight Flow IndicatorsVisit Website
Key InstrumentsKey Instruments Flow Control Valves
Key Instruments offers control valves for low flow OEM, laboratory instrumentation, or bench top flow control applications. The valve designs and material make them suitable for use with a variety of gases and fluids.

Complete valves are available in straight through or 90 degree angle body configurations and are constructed of brass or stainless steel. All valves are supplied with 1/8" FNPT inlet and outlet ports. The valve cartridge may also be integrally mounted in flowmeter assemblies. The economical cartridge valve (CVS) is available in three different needle tapers which cover our entire flow range. These units have a rising stem and provide nine turns from closed to full open.

Flow Control ValvesView Data SheetFlow Control ValvesVisit Website

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