FCI ST50 air and compressed air flow meter

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FCI’s ST50 is a compact device for repeatable flow rate measurement of air, compressed air or nitrogen.

The insertion-style flow meter has no moving parts and is available in probe lengths for installation into pipe diameters from 63 to 610 mm. It is easily connected into the pipe via a 1/2″ or 3/4″ NPT compression fitting. The ST51 uses constant power thermal dispersion drive technology, with a slightly heated sensor, which provides a subtle drying effect on the sensors that results in effective measurement in moist measurement applications.

The ST50 electronics are housed in a rugged, IP67-rated enclosure with dual conduit ports in either NPT or M20 threading. The instrument comes with dual 4–20 mA outputs — one for flow rate and one for temperature.

A 500 Hz pulse output (for external totaliser) can be added as an option. The transmitter/electronics can be integrally mounted with the flow element (probe) or be remote mounted to best match the user’s installation situation.

The ST50 flow sensing element is designed to feature precision, platinum RTD in small-diameter, ‘equal-mass’, all-metal thermowells to provide repeatability and fast response.