When using a cylinder of compressed gas, it is important to establish that there is sufficient gas available for a peaceful hypoxic death. For compressed gas in cylinders, the easiest way of ensuring this is to measure the pressure. This is particularly important for cylinders that have been kept in storage for long periods.
If using a Max Dog Brewing regulator, the pressure will be shown on the gauge of the regulator. To measure the pressure, turn the regulator flow rate to 0 liters/min and open the cylinder to read the pressure. This should be ~12 MPa (1750 psi) (see Fig).