Permeation is usually quoted in percent per month — an engineer’s unit. This calculator translates it into the unit your purchasing department reads: money. Pick your gas, cylinder and gas price, and see what gas escaping through the liner costs per year for every cylinder construction — including the MEYER sealed liner, where the answer is: nothing measurable.
Browse sealed-liner cylinders →
| Construction | Loss rate | One fill lasts* | Gas lost / yr† | Cost / yr† |
|---|
*Time for a single fill to fall to 90% of contents. †Held at pressure with top-ups (a rig, standby system or stored fleet), per cylinder × fleet. Model: liner-intrinsic rates at 20 °C from MEYER bench reference data (H₂ basis, ×2.5 for helium), scaled linearly with pressure from 300 bar. Real-world cylinders see 0.5–2× theoretical rates; dome geometry and seals dominate in practice. The MEYER sealed liner is modelled at the Type 1 steel reference rate — measured data ships with certificate documentation. See the permeation calculator for the physics, and the sealed-liner announcement for the engineering.
What this calculator tells you
Composite cylinders with polymer liners lose gas by permeation — the gas dissolves into the liner and diffuses out. For daily-fill use nobody notices; for anything held at pressure — helium leak-test rigs, standby hydrogen systems, pressurant storage, positioned fleet stock — the loss compounds into a recurring cost. Helium makes it worst: it permeates roughly 2.5× faster than hydrogen and costs more per fill. The MEYER sealed liner removes the line item: no measurable permeation, verified by helium leak detection, in a cylinder that weighs a third of the aluminium alternative. Explore the helium range and hydrogen range, or read where lightweight helium cylinders change the economics.
