A portable gas transfer device for sterilization at a sterilization site includes: a housing a pressurized gas canister held by the housing a first passageway in fluid communication with the pressurized gas canister and configured to supply pressurized pre-sterilization gas from the pressurized gas canister to the site a gas discharge canister held by the housing and a second passageway in fluid communication with the gas discharge canister and configured to supply post-sterilization gas from the site to the gas discharge canister. Additional related devices, systems and methods are provided.
