manometer?

Don't really know what I was looking at but Lowes had what was called a manometer but looked more like a tire pressure gage & as far as I could tell worked on the same principle. The way it's packaged I couldn't read much but it looked like you have the tubing with a fitting like a tire valve & just put this on to check the draft. It seemed to claim a high accuracy rate but I would have my doubts a lady was buying the last one there for her husband for a wood burner so I was just asking her & didn't get much of a chance to look at it. Just wondering if anyone else has seen or heard of these? I'm pretty sure it was around $10 or less.

I just checked Lowes website and nothing for manometer came up and I've never seen anything like that in Lowes around here.

Just get a Dwyer Model that is for measuring draft. Mark II model 25 is what most of us use.
You can find them online for $20-35 depending.

check ebay, sometimes you find a good deal or two there too.

WNY wrote:Just get a Dwyer Model that is for measuring draft. Mark II model 25 is what most of us use.
You can find them online for $20-35 depending.

check ebay, sometimes you find a good deal or two there too.

The Dwyer 460 air meter works good as well and no fluid to worry about.

You might consider making your own.

http://ecorenovator.org/forum/tools/205 ... meter.html

I would suggest using Merriam 100 Red Unity Oil (same density as water, 1.00) since it won't evaporate as quickly as water would, but it will act the same way. That way your "inches of water column" scale will be drawn in inches taken straight off of a ruler. Use a ruler scaled in 10th's of an inch.

Dwyer's Red Oil (for comparison) has a density of 0.826.

That looks like something that would be fun to play with, thinking about it I have something similar somewhere in the vast wasteland I call a garage. I also at one time had a GT750 motorcycle & made a three tube one to balance the carbs. For our needs I would think you would still need a Dwyer or some other to have a known level to compare to just to make sure.

Flyer5 wrote:

WNY wrote:Just get a Dwyer Model that is for measuring draft. Mark II model 25 is what most of us use.
You can find them online for $20-35 depending.

check ebay, sometimes you find a good deal or two there too.

The Dwyer 460 air meter works good as well and no fluid to worry about.

Agreed The 460 has much lower resolution and the same top end that the model 25's. It might not be as easy to read from a distance but the added versatility is good to have. It's easily portable and can be used to measure and balance the air flow from the registers on ducted air systems . The added range that this instrument has makes it especially helpful to find leaks around gaskets. Last year I measured the pressure drop created by the intended lack of gasketing at the bottom of the Vigilant's window with my 460 (bought it from Flyer5 ) .

samhill wrote:For our needs I would think you would still need a Dwyer or some other to have a known level to compare to just to make sure.

Not if your vertical scale is drawn out accurately and with demarcation lines scaled in 10th's of an inch, and you use a unity oil. It will read accurately in 10th's of an inch of water column. The tricky part comes only if you use an oil that does not have a density of 1.00 (such as Dwyer Red Oil).

One thing I might consider would be to tilt it a bit more steeply so the precision in reading it is a bit higher.

lsayre wrote:

samhill wrote:For our needs I would think you would still need a Dwyer or some other to have a known level to compare to just to make sure.

Not if your vertical scale is drawn out accurately and with demarcation lines scaled in 10th's of an inch, and you use a unity oil. It will read accurately in 10th's of an inch of water column. The tricky part comes only if you use an oil that does not have a density of 1.00 (such as Dwyer Red Oil).

FYI ... Dwyer 460 Air Meter measures "pressure ranges from .005-.09 and .05-1.0 inches w.c."

Here's a link to the [urlhttp://www.dwyer-inst.com/Product/Pressure/Manometers/FluidFilled/SeriesMarkII/Intro]Mark II Model 25[/url]