The 525K is a full fledge Ratemeter and Totalizer. It can indicate in rate/sec or minutes, and has a count frequency up to 10kHz. An overflow condition will be indicated by 1 Hz flashing of rate value and leading zeroes of totalizer. The 529K and 530K come available in four different resolutions, with a Display Range of -19999..0..99999 with leading zero blanking.
525k, 529k, 530k
Rate & Total Indicators with Pulse or Analog Inputs