The OFS-2000 has a range of 0-40 m/sec and is the only flow sensor that gives a true non-contracting cross-stack flow measurement of the process. These sensotrs can handle high temperatures up to 1800 F and work great on inconnerators, SRU, Thermal oxisizers, Boiler stacks and as also used on combustion air.

The OFS-2000W model is equipped with Automatic Gain Control (AGC) to compensate for variations in opacity caused by particulate matter or moisture carried in the flow. it can hanle heavy particulate and larger stacks. 

The OFS-2000F was designed specifically for Flares stack sand reports flow velocities from 0.03 - 170 m/sec with a ± 2% accuracy.

The OFS-2000P is an Optical Flow sensors that can also report a general Dust/Particulate loading in virtually any operating condition.  These are not meant for EPA applications but work great for the process or any application interested in a comco flow, dust/particulate measurement

The LOA-105 Optical Anemometer has a 3Km range and was developed for monitoring the flow off roof vents of aluminum smelting pot room's. Used world-wide LOA-105 is designed for industrial use to handle large interior area.  It's superior accuracy and resistance to harsh environments make LOA-105 the sensor of choice for monitoring flow in large-scale applications.