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OLD Laser Fume Extractor windspeed reading

The Anemometer reads 12.4 m/s through a 4" duct for our old fume-extraction unit.

 

That's 2441 ft/min * (0.08727 ft^2) = 213 cubic feet per minute for our little Epilog Helix. Not bad, but certainly not great. It's plenty for the small, well-focused volumes in this little laser, but nowhere enough volume to filter out the new large 4'x3' laser!

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Uploaded on September 19, 2012
Taken on September 17, 2012