Auxiliary apparatus for a particle analyser

摘要

An auxiliary apparatus for a particle analyzer for measuring the particle count within particle size intervals bounded by shiftable or displaceable thresholds. Infeed lines conduct the signals generated in a feeler to comparators. Other infeed lines conduct the comparison voltages generated by comparison voltage generators to the same comparators, an operating element simultaneously alters the comparison voltages from two comparison voltage generators by the same magnitude and a selector switch connects one of two infeed lines with one of the infeed lines. The inputs of an antivalence or Exclusive-Or discriminator are connected by an infeed line or conductor with a time-delay element and by an infeed line or conductor with one comparator, the output of which discriminator is connected by a line or conductor with a pulse counter.