Mison gas pressure alarm for welding robot (KuKa+ fronius)

hello. my name is René.

i am a welder-assembler/programmer for a company near Montréal, Québec.
i do some basic/easy programming, made possible by the very friendly GUI developed by Kuka.

we've been having a problem.
the robot welds nonstop for an hour or so.
sometimes right in the middle of the project, we run out of Mison gas (proprietary argon/carbon mix by Linde).

i did some research on google. we called the representatives of Fronius and Kuka.
apparently, there is no device on the market to keep an eye on the gas pressure..

i'd like to do something about it.. if at all possible.
i say pressure, by that i mean PSIG. we use 35 PSIG as a basic set pressure for our welding machines.
it works great for everything we do.

would there be a way to set up Arduino, with some kind of pressure sensor, to make a speaker beep, loud.

the compressed argon, when "decompressed" becomes cold. very cold. that could be a problem.
stainless steel sensor would probably be needed.

anywhere between 30 to 40 PSIG would be good.
and when it drops below 30 PSIG. BEEEEEEEEEP.

thanks for reading this. i think i gave as much info as i could.
if you have any questions, ask ahead, i will answer as fast as i can.

You could just buy a pressure switch which operates at your desired pressure and sounds the alarm - you don’t need an Arduino.
The problem , as you say , is getting a device which will work over the desired temperature range .

wasn't aware those existed.. i overthought this lmao

i'll be sending emails to companies that make pressure sensors i guess. thanks for your help.
if you come across anything that might help me out, i'd appreciate the heads up.

thanks!