A first common electrode is formed on a vibration plate and to be fixed at a predetermined potential. A node consists of a network element that has two connections methodologies\u2014typically a node will have a radio link and a wired link to the Internet. All the combinations of bit lines and source lines that are connected to the drains and the sources of nonvolatile memory cells are different from each other. The monitoring system may measure the power consumption of appliances operating on the electrical system andor detect possible fault conditions. In particular, a mains frequency of 50 Hz is intended. In another embodiment, the system for real time monitoring of catheter aspiration further includes a vacuum source for connection to the first port and an aspiration catheter having an aspiration lumen for connection to the second port.