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-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

OSI's patented Laser Level Meter (LLM) is a compact industrial sensor that utilizes an infrared laser and advanced micro-processor to measure levels in in industrial storage tanks, large commercial process bins and agricultural silos. The LLM-100 uses an eye safe pulsed infrared laser and measures distance using time of flight of a very narrow laser pulse. The sensor uses a very sensitive Avalanche Photodiode, which is coated with a bandpass filter to block out all ambient light. This enables the LLM-100 to be used indoors and outdoors on sunny days. The sensor can be used as a stand-alone sensor requiring only 12.5-36 VDC and out puts RS232 and 4-20 ma outputs or with optional control box.