SE INTERNATIONAL MONITOR 4EC Analog Radiation Detector

Monitor 4EC / Analog Radiation Detector – a ss y x
Monitor 4EC are compact, ergonomic, general purpose survey meters capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. A red count light flashes and a beep sounds with each event detected.


  • Monitor 4EC
  • Carrying Case w/ Belt Clip


  • Detector
    Halogen-quenched GM tube, energy compensated sidewall 2mm thin filter. Thin mica window 1.5-2.0 mg/cm2 thick. Effective diameter of window is 9.1 mm (.36 in.).
  • Operating Range
    0-.5, 0-5, 0-50 mR/hr 0-500, 0-5,000, 0-50,000 CPM or 0-5, 0-50, 0-500 µSv/hr (SI Scale Meter Option)
  • Energy Sensitivity
    The energy response to gamma through the detector sidewall is flat to within +61% or -26% over the range of 40 keV to 100 keV, and within +35% or -17% over the range of 100 keV to – 1.3 MeV (referenced to Cs-137).
    Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%.
    Detects beta at 50 keV with typical 35% detection efficiency.
    Detects beta at 150 keV with typical 75% detection efficiency.
    Detects gamma and x-rays down to 10 keV typical through the window (non-compensated), 40 keV through the sidewall.
    Normal background is approx. 5-20 CPM.
  • Accuracy
    Typically ±15% of reading (Cs137)
  • Display
    Analog Meter holds full scale in fields as high as 100X maximum reading. CPM & mR/hr scale. Optional SI Scale Meter Available


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