Circular aperture areas are standards of high importance for the realization of photometric and radiometric measurements. where the accuracy of these measures is related to the accuracy of the circular aperture area calibrations. In order to attend the requirement for traceability was developed in Brazilian metrology institute. a methodology for circular aperture area measurement as r... https://www.deliandiver.com/product-category/hot-water-spout-nozzle-pipette/