Quick Start Guide

The Introduction video will help you familiarize yourself with the Radiation Alert® Frisker handheld digital radiation detector.

The Radiation Frisker uses a Geiger-Mueller tube to detect radiation. The Geiger tube generates a pulse of electrical current each time radiation passes through the halogen quenched tube and causes ionization. Each pulse is electronically detected and registers as a count. The Radiation Frisker displays the counts in the mode you choose.


  • CAUTION: Never touch the Radiation Frisker to a surface that may be contaminated. You may contaminate the instrument.
  • Do not leave the Radiation Frisker in temperatures over 100° F (38° C) or in direct sunlight for extended periods of time.
  • Do not get the Radiation Frisker wet. Water can damage the circuitry and the mica surface of the Geiger tube.
  • Do not put the Radiation Frisker in a microwave oven. It cannot measure microwaves, and you may damage it or the oven.
  • This instrument may be sensitive to and may not operate properly in radio frequency, microwave, electrostatic, and electromagnetic fields.
  • If you do not expect to use the Radiation Frisker for longer than one month, remove the battery to avoid damage from battery corrosion. Change the battery promptly when the battery indicator appears on the display.