Holder of certifications to ISO 9001-2008;
ASME S and U;
NB R and PED Module H.

Your resource for accurate, reliable flow metering solutions for industrial, power generation, municipal water and wastewater,
oil and gas and automotive/EGR applications worldwide.

In less than three decades, Primary Flow Signal has become a leader in the design, manufacture and installation of differential producer type flow metering equipment and accessories specifically suited to the measurement of liquid, gas and steam phases.

We strive to provide every client, large and small, with:

• Unsurpassed accuracy and reliability
• Superior engineering support
• Technologically advanced products
• Second-to-none service
• Competitive pricing

PFS has become the preferred source for Venturi flow primaries for water and wastewater, predominantly with our proprietary HVT Halmi Venturi Tube product line suitable for raw and finished water in open and closed channel applications, as well as solids-bearing liquids using the patented HVT-SMS Sealed Meter System.

Our company was founded by Dezsoe Halmi, an internationally recognized innovator in the field of flow measurement, author of many influential technical papers and holder of numerous important patents. His lifelong efforts to improve the accuracy and reliability of our products and to provide unequaled customer service remain the guiding philosophy of our company.

Major expansions of our in-house capabilities over the past several years have set us apart as a full-service engineering and manufacturing resource for fabricated Venturi flow elements, orifice meter runs, nozzle runs, PTC-6 test sections, and ASME Venturi flow elements.

Whether designing a filter-control system for a municipal water facility, special equipment to handle the tar sands of Alberta, a unique and precise means to control the EGR system of diesel engines, or the largest Venturi flow elements in the world, we welcome the challenge.

We meet all our clients’ needs for accurate flow metering through innovative use of proven technologies, the highest quality products and a service team that assists clients before, during and after the installation. Our certifications include ISO 9001-2008; ASME S and U; NB R and PED Module H

We welcome single-piece orders but have the capability to handle large volumes and multi-year LTA high-speed, high-volume needs. Line sizes have ranged from 1/2" through 180" inclusive. But we can fabricate any size.