Automatic, precise metering
With industrial systems as well as with the performance of test series in research and development, an exact metering of the compressed air is often required in order to ensure the functionality of the systems, to optimize the production process and to determine the test results on an ever-constant basis.
Test systems for determining the respirability of aerosols are operated in the pharmaceutical research field, for example. Respirability is understood as the capacity of a substance, such as particulate matter, smoke or a medicine, to enter the lungs to the alveoli, meaning the part of the lung in which the gas exchange occurs during outer breathing. While high respirability can trigger critical illnesses in the case of harmful substances, this is desired for medicines for the optimum metering and effect of the substance. In order to determine the respirability of a substance, a defined amount of the substance is injected into an "artificial" lung – a special test chamber with various levels – in powder form by means of a short, precisely metered burst of compressed air (compressed air shot). Based on the storage of the substance in the levels of the test chamber, the respirability can be determined. The precondition of the correct determination of the respirability is the optimum and precise metering of the compressed air.
The testo 6440 compressed air meter constitutes the ideal aid for this and a multitude of other applications that require high-precision metering of compressed air based on its individually-parameterizable signal outputs and its extremely fast reaction time.