Diffusion Tubes for Trace Concentration Standards of Solids and Viscous Liquids

Diffusion Tubes have been used for many years as an inexpensive, do-it-yourself way to dynamically blend trace concentration gas mixtures for a large number of common solvents. Typical diffusion tubes have a glass reservoir attached to the end of a precision bore capillary tube. Solvent liquid is injected into the reservoir through the capillary bore. Solvent emission is controlled by diffusive flow through the capillary and adjusted by choice of capillary bore, length and operating temperature.

KIN-TEK’s Trace Source™ Configurable Diffusion Tubes extend the range of compounds that can be used to include subliming solids and viscous liquids. These tubes have a removable reservoir that allows filling with the capillary removed, so the component compound can be any consistency. Additionally, a variety of pre-configured and tested capillaries can be interchangeably fitted to the reservoir adjust the range of concentrations obtainable.

Multiple tubes can be used simultaneously in the FlexStream™ Automated Gas Standards Generating System to create multi-component gas mixtures.