FCI ST80 Series thermal mass flow meter

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The ST80 Series thermal mass flow meter from Fluid Components International (FCI) offer FCI’s Adaptive Sensor Technology (AST), which features a hybrid sensor system that combines both constant power (CP) and constant temperature (CT) thermal dispersion sensing technologies in the same instrument.

When operating in AST mode, the ST80 meters measure in CT during start-up and through the lower flow ranges, and will then seamlessly shift into CP mode at mid-range and higher flow rates. The result is a best-of-both technologies performance level where the ST80 meters deliver a fast response with extended measuring ranges, at low power consumption to maximise sensor reliability and reduce instrument energy expenses.

ST80 flow meters feature FCI’s rugged no-moving-parts flow element design, which provides direct mass flow measurement with a single process penetration. They are accurate to ±1% of reading, ±0.5% of full scale and repeatability of ±0.5% of reading. The turndown ratio is factory preset to meet the requirements of the application from a minimum of 2:1 up to 100:1. This meter series operates over a wide flow range; the insertion-style configuration range is: 0.07 to 305 NMPS; the inline style configuration range is: 0.01 to 3140 NCMH.

The ST80 Series features multiple outputs to interface with control systems and/or set-up or configuration devices. The standard ST80 meter configuration includes: dual 4–20 mA, NAMUR NE43 compliant analog outputs, HART (version 7), Modbus and Profibus PA. All digital bus communications are full two-way I/O.