Diaphragm Pump Compares Unfavorably With a Bees Heart

One diaphragm pump, utilizes a piezo-electrical actuated micro-diaphragm to dose liquids and gases. Its chip measures 7 x 7 x 1 mm3, and the diaphragm displaces 2 mm a minute. The pump tolerates bubbles and primes itself. (Remember, when you are so small, bubbles always give you troubles.) The pump ejects liquid against a 500 mbar head of pressure. Mechanical parts include a valve unit, two passive check valves, and a disc actuator. The latter periodically deflects a pump diaphragm. Parts are of silicon. One adjusts the rate of pumping by setting a frequency or amplitude through a driver module. Review now the bee's heart in Chapter 1 and compare.

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