This procurement is mission-critical for the SMART SEED Innovation Award project, Vendor must demonstrat the ability to meet the requirements for this testing matrix. The testing threshold is agent vapor, with an objective to test at ultra-low concentrations (10 ppb). The vapor generator is uniquely required because it provides the highly regulated, low concentration chemical vapor output necessary to accurately characterize the sensitivity and response time of the NDSI electronic vapor sensors under variable temperature and humidity conditions. Without this specific generation capability, DPG cannot confidently validate the sensor algorithms or performance data. To meet the specific demands of chemical agent testing and precisely control vapor generator output across the targeted ranges, the procurement must include the following specific components and upgrades: A corrosive gas upgrade to prevent damage to internal components from corrosive chemical agents and chemical agent simulants. A diffusion tube, diffusion tube membranes and gaskets, and a permeation tube kit.