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Precision 7520 series rotameter with 50mm scale, 316L SS internals, ±6% accuracy, max 100 psig air flowmeter.
The King Instrument 7520 Series Rotameter is a precision variable area flowmeter crafted from durable cast acrylic for robust laboratory applications. It features 316L stainless steel internal components and an EPR O-ring, ensuring chemical compatibility and durability in gas flow measurement environments. Designed with 1/4" female NPT brass fittings (2C block size), it supports air flow measurements with an accuracy of ±6% full scale on the 50mm scale model. The rotameter accommodates an air capacity of 4 SCFM at a maximum pressure of 100 psig, making it suitable for controlled gas flow monitoring in research fields such as molecular diagnostics and bioprocessing. This equipment is essential for biotechnology laboratories requiring reliable inline flow control and precise measurement for applications including biomanufacturing gas delivery systems and synthetic biology experiments. The robust design and high repeatability render the 7520 series rotameter optimal for integration into laboratory gas distribution and analytical workflows where consistent flow regulation is critical.
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We're an independent team based in The Netherlands, working with research labs and procurement teams across Europe and worldwide.
With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.
Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options alongside the offer.
Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.
Two to six weeks, depending on refurbishment scope and whether calibration is included.
We ship to 38 countries. Crating and customs handling are quoted with the instrument.
Tell us what you need and a scientist finds it for you, usually within the hour.
Last updated 23 October 2026
The middle half of the 172 with a price runs from €348 to €1,013.
