The 491M-PB module is a pressure balance accessory that enables the 491M modular gas-standards generators to maintain steady gas pressures. At trace concentrations (e.g., ppm, ppb, and ppt) of reactive gases, surface adsorption within the system can significantly alter the actual mixture concentration that is delivered. The 491M module eliminates concentration fluctuations by providing a stable reference pressure for all of the mixture flow paths. This reference pressure is balanced to the system operating pressure to ensure stable delivery concentration, even during operating mode changes in either the 491M standards generator or the analytical system that is being tested.
Company
KIN-TEK Laboratories, Inc.