Primary Flow Signal, Inc. is a full service engineering & manufacturer of the world’s most reliable flow measurement products ... with over 35 years in business providing solutions and services to the flow measurement industry. We design and manufacture flow meters and custom solutions used for a vast array of applications such as drinking water, oil & gas, steam, cryogenic and any number of specific situations that require the measurements of a liquid or gas. The Primary Flow Signal, Inc. team consists of over 150 employees including our in-house engineering design team and fabrication team working at our 70,000 sqft manufacturing site located at our headquarters location in Cranston Rhode Island. PFS has additional offices located in Dallas TX, Houston TX, Odesa TX, Seneca, SC and Edmonton, AB Canada. read more