Fluid International ST75 flow meter

The ST75 flowmeter from Fluid International delivers precision flow measurement while reducing the consumption of energy fuel gases, specialty gases and pneumatic air. It is suitable for refineries and natural gas pipelines, refrigeration and air conditioning, manufacturing plants, welding operations and large engine turbochargers.

The flowmeter is designed for line sizes from 6-51 mm, which is suitable for compressor gas line measurement, and provides three outputs: the mass flow rate, totalised flow and media temperature. The design includes media temperature compensation to ensure performance under variable process and plant temperature conditions. It offers accuracy to ±1% of reading and ±0.5% repeatability. Its precision flow element has a no-moving-parts design that employs platinum RTD sensors embedded in equal mass thermowells with microprocessor electronics that can be calibrated to laboratory standards for CO₂ as well as many other gases.

Operating over a wide flow range, from 0.01 to 950 NCMH depending on line size, the flowmeter is equally well suited to low-flow and high-flow applications. For variable process conditions, the ST75 is factory preset to a wide turndown range at 10:1 to 100:1.

The flowmeter offers fully scaleable 4-20 mA and 0-10 V outputs. They are user assignable to flow rate and/or temperature and a 0-1kHz pulse output of total flow. The instrument can be ordered for input power with either 18 to 36 VDC or 85 to 265 VAC, with or without a built-in LCD digital display.