FCI’s compact thermal flow meter line has been expanded and improved with an all new, advanced electronics design that features the addition of Hart, Version 7, digital bus communication and more.
The new models ST51A, ST75A and ST75AV thermal mass flow meters provide users with an economical yet rugged solution to measuring air or gases in demanding industrial process and plant applications.
They combine all new surface-mount, lead-free RoHS compliant electronics with highly accurate, repeatable all-welded, equal-mass flow sensors. The added Hart digital bus communication and its associated device driver (DD) have been tested and certified by the Fieldcomm (Hart) Group to meet the latest Version 7 standards. With over 30 million supported field instruments installed worldwide, Hart technology offers a reliable solution for leveraging benefits of intelligent flow meters and other devices through standardized digital communication.
In addition to Hart bus communications, standard ST51A, ST75A and ST75AV outputs are dual 4-20 mA that meets Namur NE43 and features a 500 Hz pulse. The electronics are housed in a rugged IP67 rated, dual-cable port transmitter enclosure available in aluminum or a new stainless steel version. The transmitter can be mounted directly to the flow sensor or remotely mounted up to 100 feet (30 meters) away.
The highly reliable flow meters already have obtained the CE mark, and Div.1/Zone 1 Ex agency approvals of FM, FMc, Atex and IECEx. Additionally, they have also been independently verified to meet International Electrotechnical Commission's (IEC) standard IEC 61508 for Safety Integrity Level (SIL-1) rating.