Measuring syringes

[jevans]

When using syringes, what is the best method for expelling the air without getting fluid everywhere?

[colli]

turn them upside down and allow the liquid to fall against the plunger

No real need to though as you can measure the amount of liquid in the syringe as it is

I tend to draw up more than I need and expel an amount back into the container till I have the correct amount

[spacey]

Oct 25, 2014 7:25:34 GMT jevans said:

When using syringes, what is the best method for expelling the air without getting fluid everywhere?

What I do is gently flick them (holding so the needle end is pointing up) to force the air to rise to the top, then pull the plunger down a tiny bit to get the liquid thats stuck in the needle to fall back down a bit. Then sort of cover the end with a bit of kitchen roll to catch any drips and push the plunger back up

[igual]

Tbh I tend to pull the plunger up to the 1 mil mark prior to drawing liquid into the syringe makes it easier to read exact amounts.
Please make sure to either sellotape over the numbers/markers or apply clear nail polish as they will wear off fast.

[lairey]

Out of interest to those that do... Why do you bother if it's just for mixing? It really doesn't matter at all

[Greg]

Oct 25, 2014 8:18:58 GMT lairey said:

Out of interest to those that do... Why do you bother if it's just for mixing? It really doesn't matter at all

Maybe it's just a habit 

[jevans]

colli
Many thanks, never thought of using the level of fluid rather than the level of the plunger.

Thanks all for your replies!

[chykensa]

I find that if you pull up a bit of juice and then expel it back into the container before drawing up the required amount it doesn't pull up air as well unless you inadvertently lift the needle tip out of the liquid. If I do get air, I use the 'measure the liquid not the plunger' method detailed above

[jevans]

Does any body know O/Ds of the various gauge needles?
I'm looking for something approaching 1.8mm.

Jim

[chykensa]

The lower the gauge the bigger the diameter - try a 14 gauge, that's about the biggest available

[Postmodern Smoking]

Nov 3, 2014 12:59:01 GMT jevans said:

Does any body know O/Ds of the various gauge needles?
I'm looking for something approaching 1.8mm.

Jim

A 14 gauge needle has nominal internal diameter 1.6mm, nominal external diameter 2.1mm

Wikipedia has a conversion chart here, although some (like 14 and 18 gauge blunt needles are more common)

[jevans]

Many thanks Postmodern Smoking , much appreciated.

Jim