Sources Sought Notice for unipolar diffusion aerosol charger

The National Institute of Standards and Technology (NIST) is conducting market research to identify potential sources of commercial products or services that can provide a unipolar diffusion aerosol charger. This instrument is required to support aerosol research within the Chemical Sciences Division and represents a new capability for the Grand Challenge Project 1.04 research team. The UDAC must be able to operate at volumetric flows ≤ 1.5 L min-1 and be capable of placing a unipolar positive charge on the aerosol. • The UDAC will be used to place a known, high level of charge on sub-μm aerosols. • In conjunction with an aerosol electrometer, the UDAC enables calibration of condensation particle counters (CPCs) through direct traceability to the SI. • An additional mass measurement, such as using a particle mass analyzer, enables the generation of particle mass concentration standards. • Respondents should provide information about their company, the equipment they sell, technical specifications, and performance capabilities. • Respondents should also describe services available with the purchase of the equipment, such as installation, training, and maintenance.