Re: Manometer

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

for what it's worth.. the heights are proportional to density.  Mercury is
13.x specific gravity, so 1 inch of mercury is 13.x inches of water..

One can also do it in metric, much easier... 1 pascal is 1 N/square meter..
1 meter of water over 1 square meter is a cubic meter, or a metric ton, or
9800 N.. therefore 1 cm of water is 98N/square meter or 98 Pa. Compare sea
level standard air pressure of 101.3 kPa.. 1cm is, then, roughly, 1
thousandth of an  atmosphere.

A typical vacuum cleaner can easily do a couple psi.. several feet of water
column


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, July 14, 2003 8:03 PM
Subject: Manometer


 > Original poster: "J. B. Weazle McCreath by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <weazle-at-hurontel.on.ca>
 >
 >
 > Hello Coilers,
 >
 > I finally got around to rigging up a manometer to measure the pressure in
 > my hyperbaric gap.  I used "oxygen tubing" that I obtained from a doctor
 > friend and made a U loop of about 18 inches secured to a piece of wood.
 >
 > I put some water in the tube, marked the static position, then turned on
 > the vaccuum cleaner compressor.  Much to my amazement, it proceeded to
 > blow the water completely out of the tube!  I've obviously got a lot
 > more pressure than I thought!!
 >
 > Does anyone know what the relationship between inches of water and actual
 > pressure in PSI is?  I know what it is for mercury, since altimeters and
 > barometers commonly use it, but I can't find any info on water.
 >
 > 73, Weazle, VE3EAR/VE3WZL
 >
 > Details of my "Hyperbaric Gap" and Tesla coil are at:
 > http://www.hurontel.on.ca/~weazle
 >
 >