FCI releases new compact thermal mass flow meters with SIL compliance

Fluid Components International (FCI), the global manufacturer of thermal dispersion flow and level measurement instrumentation, has created new and advanced ST51A and ST75A Thermal Mass Flow Meters that carry a SIL rating and SIL 1 compliance.

These new models are the industry’s most compact, lowest cost thermal flow meters yet, the company claims.

The Model ST51A Flow Meter is an insertion-style instrument designed for use in pipe diameters larger than 2 inches (51 mm). The ST51A meter is optimised for flow measurement of air, compressed air, nitrogen, natural gas, digester gas and all other biogases.

The ST75A Flow Meter is an inline-style instrument designed for use in pipe diameters from 0.25 inch to 2 inches (6 to 51 mm). The ST75A meter is designed for applications in air, all inert gases, natural gas and other hydrocarbon gases.

Both models feature wide 100:1 turndown, have no moving parts, carry global agency approvals for Div.1/Zone 1 Ex installations, superior IP67 dust/water ingress protection and rugged, all metal enclosures.

For interface and communications these instrument’s outputs include dual 4-20mA, which meet NAMUR 43, HART Version 7, certified by the FieldComm Group™ (HART), and a 500Hz pulse. Optionally available is a two-line LCD readout to display flow rate and either temperature or totalised flow.

The transmitter/electronics can be integrally mounted with the flow element or remote mounted up to 100 feet (30m) away. Users have a choice of 24 Vdc or 85 Vac to 265 Vac powering. They can be ordered with either NPT or metric threaded cable ports.

Both the ST51A and ST75A meters are temperature compensated and calibrated to the user’s actual installation conditions in one of FCI’s 19 flow stands using NIST and ISO/IEC 17025 traceable equipment.