Dräger sampling tubes and systems - Dräger Safety - #40

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Untitled table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:6.00pt "Arial", sans-serif; } .font2 { font:7.00pt "Arial", sans-serif; } .font3 { font:6.00pt "Tahoma", sans-serif; } Drager-Tubes & CMS-Handbook In 2008, measurement using impactor technology was introduced, in order to detect oil mist in compressed air. In general, impactors collect aerosol particles, making this technology excellently suited to detecting oil mists. The impactor is used together with an adapter in the Drager Aerotest Simultan. During the measurement, the air to be inspected flows through 20 nozzles in the impactor, before hitting a baffle-plate, made of cut glass, at right angles. The 90 ° redirection of air in the impactor separates the aerosol particles in the air flow on the glass plate due to their high inertia. The recesses in the glass grinding are then filled with the oil. This nullifies the light diffusion caused by the glass grinding. This principle allows for the visual recognition of small quantities of oil. I s X Impactor with Adapter in Aerotest Simultan Due to the special arrangement of the nozzles, the quantity of separated oil, and therefore the oil aerosol concentration if the air quantity is known, can be measured with good reproducibility. The measurement result is independent on the oil grade. However, note that oil aerosols vaporize at high temperatures, and the vapor is not shown. The measurement lasts 5 minutes with a volume flow of 4 L/min, making a test volume of 20 L. X 0.1 mg/m3 0.5 mg/m3 1 mg/m3 Impactors with 3 different oil aerosol concentrations.