In medical practices and hospitals, disinfectant dispensers provide the hygienically indispensable sterility of all hands treating patients. Bartels functional core of the dispenser is the mp6 micropump. Activated by an optical sensor, the mp5² delivers a predefined amount of liquid out of the reservoir. As Bartels micro-pumps are made of highly inert polymers, they are resistant even to numerous ingredients of disinfectants.
Micro pumps transporting the tiniest amounts of gases or liquids can be considered the heart of microfluidics.
The functional principle of the Bartels micro pumps is based on a piezoelectric diaphragm in combination with passive check valves. A piezo ceramic mounted on a coated brass membrane is deformed when voltage is applied. By the resulting down stroke, the medium is being displaced out of the pump chamber below. The check valves on both sides of the pump chamber define the flow direction. When the voltage decreases, the piezo’s correspondent deformation causes an upstroke of the membrane. The medium is sucked in and the chamber is filled again. In every second, the pump can do several hundreds of such pumping cycles. The pumping performance can be influenced by adjustment of the parameters.
Reference: http://www.bartels-mikrotechnik.de/
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