A microelectromechanical systems Device manufactured on a microscopic scale using integrated circuit techniques provides a sensitive magnetic field sensor by detecting motion caused by the Lorentz force produced by a current through a MEMS conductor. The holographic elements are made in the form of rectangular grooves that can be manufactured as binary features reproduced by methods of nanolithography or nanoimprinting. In at least one of the various embodiments, the one or more monitored flows of packets are tagged and threaded so that they are separately accessible in a ring buffer.