The Peaceful Pill eHandbook Frequently Asked Questions Confusing notation when describing gas cylinders
The size of a compressed gas cylinder is sometimes its physi- cal volume (ie how much water would it hold if filled), and sometimes the volume of compressed gas it can hold. Typical cylinders of Nitrogen for a peaceful death are small (2 liter) and hold ~400 liters of gas at pressure. These are sometimes referred to as either 2 liter or 400 liter cylinders!
Pressures units used are Bar (bar) or Megapascal (MPa) or psi (pounds/square inch): 1 bar = 0.1 MPa = 14 psi
Is it necessary to have more than one cylinder to ensure sufficient gas is available?
No. With the Max Dog regulator system, a full cylinder of Nitrogen will provide gas at 15 liters/min for ~20 min - more than enough for a peaceful death. Indeed, with good flow regulation and a cylinder containing more that 200 liters of gas, death will result.