EG-20 Counter-Timer

 
  • A Geiger Counter with power supply
  • A Photogate Timer measuring milliseconds
  • A frequency meter

The six- decade instrument Counter Timer shown here with the EK-05 Amplifier Power Supply acts as a Geiger Counter, a pulse counter, or a timer. It supplies 450 Vdc for an EK-25 Geiger Tube which mounts in an EK-26 Geiger Stand.

The EK-20 Counter Timer has an internal 10 kHz quartz crystal for millisecond timing.

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