I need a pressure meter with a range of 100 mBarrs is that common, any suggestions?

Question

I need a pressure meter with a range of 100 mBarrs is that common, any suggestions?

Answer 1

A 'U' tube Water manometer will fit the bill and will be easily readable. (1bar = 14.5psig = 1,000mb.

100mb = 1.45psig

(1" of water exerts a pressure of 0.036psi = 36mbar).

It will need to be about 4 feet high with the Zero point at 2 feet (for each leg) and scaled at 0.5" increments above and below zero..(40" of water = 3.333ft x 0.433psi/ft = 1.44psi = 100mb).

You could make your own using a length of clear plastic tubing fastened to a board in a 'U' shape.

Answer 2

That is more of a vacuum gauge than a pressure gauge.  Therer are rough vac. gauges that handle the range between 0 and 1000 mbar.  I did a quick look on Google, and there were none that popped out as having a full-scale range of 100 mBar, but I am sure there must be something out there.

Google "vacuum gauge" and do a little more research.

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Answer 3

If you don't mind mentally shifting the decimal point from kPa to mbar,  analog gauges are available from http://www.dwyer-inst.com/HTDOCS/PRESSUR...

there are digital meters that will readout directly in mbar, but I imagine they tend to be significantly more expensive, these: http://www.topac.com/pressure.html are about 5 times as much as the Dwyer analog gauges. Dwyer also has some digital meters that are less expensive (about $200),  some of the lower pressure models read in kPa, but there is a "0-10.00 psi (.6895 bar)," range model that with a 4 digit display might give reasonable results using the lower 1/7 of it's range: http://www.dwyer-inst.com/htdocs/pressur...

No doubt there are other vendors, but I'm  familiar with Dwyer, and Topac was just the first I found with a search.