The SonoTek SelectaFlux Basic is a high-accuracy selective fluxing system designed for integration into selective soldering machines or as a standalone precision station. Utilizing Sono-Tek’s unique Microspray ultrasonic atomizing nozzle, the system produces a highly focused, low-velocity beam of spray that is immediately entrained in a controlled air stream. This “Basic” configuration offers a focus-adjustable air shroud that allows operators to tune the spray width from 2 mm to 38 mm, providing exceptional control over fine-line deposition without disturbing neighboring components. The SelectaFlux is compatible with ALL flux types and is particularly effective for tinning and fluxing odd-shaped components that require localized application. Its self-cleaning ultrasonic design prevents the common clogging issues associated with traditional pressure nozzles, ensuring a wide range of delivery rates (1–250 $\mu\text{l/s}$) and consistent volumetric accuracy for the most delicate micro-assembly tasks.