How do I measure inches of water column in a exhaust for a reflow oven ?
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How do I measure inches of water column in a exhaust for a reflow oven ?
Do you mean static pressure?
The first two links give you the procedure:
Here is a particular probe and an optional "surge damper" device
http://www.dwyer-inst.com/PDF_files/...ensors_cat.pdf
In a round duct what you will find is that usually near the center the flow is more laminar, stable and near a maximum. Near the edges, you get more of a turbulent flow.
You need to be at least a duct diameter away from say the exit and another duct diameter before it hits the fan.
If your going to be doing this as part of a routine inspection consider installing ports and use a differential pressure sensor.
W.C. is yet another unit like PSI
Example: Digital Manometer, Dual Input -TPI 621 - Mfg# 621
A differential manometer may be more useful. For single ended use, leave one port open to atmosphere.
Dwyer Engineering is a major manufacturer of air velocity and pressure equipment.
I hope I helped.
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