ADVANTAGES high accuracy due to controlled valve core Օ frequency from single pulse to 450 Hz (higher frequencies on demand) valve closed in power-off mode Ֆ no dripping and uncontrolled pollution 24-hours non stop application possible Օ very long life time easily exchangeable nozzles for various applications Օ very good chemical stability software-controlled temperature- and pressure independent dispensing due to external Control-Unit NJ-E-4... Օ intelligent upgraded processor with advanced timing and automatically identification Technology This high performance valve was developed for the dis-pensing of liquids in a viscosity range of up to 2000 mPas. The volume range reaches from 8 nl up to 10 l per dis- pensing cycle. The liquids are transferred without impact of the nozzle just as with all other microdrop microdispenser systems. In combination with the very precise switching perfor- mance of the piezovalve this results in a very high volume accuracy of < 1%. The improved system allows automatically identification of the valve and its spezific piezo calibration data. The intelligent upgraded processor guaratees a very precise and linear time base (advanced timing). The number of dispensing cycles are counted and stored in the valve (cy- cle count), which enables the user to include individual maintainance concepts in dependence of the dispensing process. The flat design, with a thickness of only 10 mm, allows the combination of several valves in a compact array. External control via a host computer is possible with interfaces like RS232C, RS485, SPS or others.The dispenser nozzles can be exchanged even by an unskilled user. This is possible due to the patented quick- exchange system which reduces down times, due to nozzle clogging, to a minimum. Besides, the system ensures resistance also agains un- usual operating errors. >