ST80/ST80L Mass Flow Meters

Single-Point Insertion Flow Meter

The FCI ST80 Series represents the pinnacle of thermal mass flow measurement technology, designed to provide high performance and long term reliability in the most demanding industrial environments. When precision and durability are nonnegotiable for your process automation, the ST80 stands as the industry standard. This series provides direct mass flow measurement of air and gases without the requirement for additional pressure or temperature sensors, reducing installation complexity and potential leak points.

Advanced Sensing Technology (AST)

The technical superiority of the ST80 series begins with its patented Adaptive Sensing Technology. This hybrid sensor drive is a first for the industry, combining both Constant Power and Constant Temperature measuring techniques.

By operating in Constant Temperature mode at lower flow rates for extreme sensitivity and seamlessly shifting to Constant Power mode at higher flows, the ST80 achieves a remarkable turndown ratio of up to 100:1. This ensures accurate measurement during system startup and peak operation alike. This technology provides significant value by increasing energy efficiency and optimizing complex industrial processes.

Rugged Reliability with No Moving Parts

Traditional flow technologies often suffer from mechanical wear or clogging which leads to frequent downtime. The ST80 series utilizes a robust design with no moving parts, making it virtually maintenance free. For applications where moisture and particulates are common, such as wastewater treatment or biogas recovery, the ST80 offers a unique Wet Gas flow element. This mechanical design shunts water droplets away from the sensor to ensure accuracy even in saturated gas streams.

Seamless Integration and Communication

The ST80 is engineered to be the most connected thermal meter on the market today. Whether your facility utilizes traditional analog signals or advanced digital bus communications, the ST80 is compatible with your existing DCS, PLC, or SCADA systems.

Versatile Installation Options

The ST80 series is available in two primary configurations to fit any piping requirement:

• Model ST80 (Insertion Style): Ideal for pipe diameters from 2.5 inches up to 99 inches [64 mm to 2500 mm].

• Model ST80L (In-line Spool Piece): Designed for line sizes of 1, 1.5, and 2 inches [DN25, DN40, and DN50].

Expert Partnership and Support

Choosing the ST80 means more than just purchasing hardware. It is an investment in a complete technical partnership. From the initial application review to on-site commissioning and ongoing technical support, our team is dedicated to ensuring your measurement solutions perform at peak levels.For hazardous area installations, the ST80 is SIL 1 compliant and carries global agency approvals on the entire instrument. This commitment to safety and quality makes the ST80 the clear choice for critical air and gas flow applications.