would this work for my spudgun?

[spud-freak]

does anybody understand a little bit german here?

[jackssmirkingrevenge]

does anybody understand a little bit german here?

Only if Till Lindemann is shouting it

[The_Guerilla_Guy]

does anybody understand a little bit german here? Smile

In fact, I do yes^^

[Crna Legija]

Jörgs does

[Technician1002]

The problem with metering with a pressure gauge is the simple fact that screw on clean out caps don't reliably seal. If it leaks some, your mix will be way off. A volumetric meter can tolerate some chamber leakage and still be very close to the proper mix.

[spud-freak]

oukey i've testet it, but i can't so little set the propane-butane gas
because i don't have a little gauge for this mini pressures..

tomorrow i want to build a hybrid gun with steel pipes!
a 1x mix i not so efficiently, whitch mix do you need?

[Technician1002]

To find a very low pressure gauge, you want something used to monitor the pressure on air filters and such on commercial HVAC systems. Warning, they are not cheap.

I would recommend something from this page, but they are too sensitive for your application as many only measure up to 2 inch or 4 inch. You need one in the 20 inch WC range. You are looking to measure pressure in the 16 inch Water column range.
http://www.terrauniversal.com/measuring ... gauges.php

This one will work, but you will not like the price.
http://www.grainger.com/Grainger/MIDWES ... sure-3GVH6

[metalmeltr]

No it wont those are designed to be mounted in a wall to measure pressure diferentilal between the two sides, th only way it would work would be to have a large flat area on the cannon to mount/seal it to.

This is a paint booth with a similar gauge installed to measure pressure in the booth.

[saefroch]

So, how come metering a mix by measuring chamber pressure rise isn't commonly suggested? To me, that seems like the most simple method of metering, because all you'd need is a sealed chamber, a propane bottle connected to the chamber and a pressure gauge?

That works great if you have a sealed chamber and can measure minuscule amounts of pressure, which most of us can't. Can you reliably measure 0.654psi?

If I were you, I'd go with JSR's suggestion and try syringe fueling. If you have a >351mL syringe, that is...

[metalmeltr]

18.1 inches of water

[saefroch]

18.1 inches of water

I know that wasn't an answer to my question, but that leaves me horribly confused. Don't you need a given diameter for the cylinder?

[Technician1002]

Inches of water is the height the pressure will push water up a tube. Diameter doesn't matter.

[metalmeltr]

presure per a given area ia pressure per a given area

psi
lbs per square inch

The basis of pascals principle.

[saefroch]

Oh duh wow. I'm amazed I possibly missed that. I thought the question sounded stupid when I posted it...

So I does the height of the column of water doesn't matter too?

[metalmeltr]

I dont think so, but it may, I THINK it is just is the diference in height