Optical Scientific has been manufacturing optical flow sensors (OFS) for industry and Government agencies for over 30 years. OFS makes drift free flow measurements across the entire measurement path and is also isolated from the process so it won’t create a pressure drop on critical processes. Truly a versatile technology when it comes to monitoring velocity, OFS technology has proven successful in a variety of challenging applications that include high temperatures, high and variable opacity and dust concentrations, including Flare Stacks, Thermal Oxidizers, wet scrubbers, carbon capture, incinerators, primary/secondary air ducts, bag houses or similar processes with entrained / suspended liquid droplets.  OFS is unique because our patented technology is looking at fluctuations in light and thermal Turbulence. OFS measurement technique is unaffected by and does not have to compensate for changes in temperature, pressure, gas density or gas concentrations.