Instrumentation

Flow Other Optical Flow Meters

Technology

Optical flow meters are very stable with no moving parts and deliver a highly repeatable measurement over the life of the product. Because distance between the two laser sheets does not change, optical flow meters do not require periodic calibration after their initial commissioning. Optical flow meters require only one installation point, instead of the two installation points typically required by other types of meters. A single installation point is simpler, requires less maintenance and is less prone to errors.

Laser-based optical flow meters measure the actual speed of particles, a property which is not dependent on thermal conductivity of gases, variations in gas flow or composition of gases. The operating principle enables optical laser technology to deliver highly accurate flow data, even in challenging environments which may include high temperature, low flow rates, high pressure, high humidity, pipe vibration and acoustic noise.














Manufacturers

OFS 2000 Series

The OFS-2000 series optical flow meters from OSI are immune to the effects of temperature, pressure, humidity, density, path length, turbulent flow or gas composition. The sensors have a 5000/1 turndown ratio and will not create a pressure drop. The OFS-2000 series flow meters also offer a much greater flexibility when it comes to plant safety and installation requirements compared to traditional Ultra-Sonic sensors.

Originally designed for industry to assist measurement of greenhouse gas emissions, further refinements have proven their use in process control, flare stack monitoring, tunnel vents, combustion control - and more. OFS-2000 series sensors meet EPA 40 Parts 60 & 75 and are in service in power plants, mines, refineries, incinerators - wherever they can serve - throughout the world.

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