Radiation Alert Monitor 4

The Monitor 4 is compact, analog radiation detector. A general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges. Proven and reliable over decades of use in the industry.

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Model

Monitor 4

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The Monitor 4 is compact, analog radiation detector. A general purpose survey meter capable of detecting alpha, beta, gamma, and x-rays over 3 selectable ranges.

Proven and reliable over decades of use in the industry, the Monitor 4 has evolved into one of the best analog radiation detectors of today. Simple and ergonomic , a red count light flashes and a beep sounds with each count detected. Battery check and silent operation with the flick of your thumb.

Features

  • Simple and ergonomic
  • Red count light flashes and a beep sounds
  • Battery check
  • Silent operation

Specifications

Detector

  • Halogen-quenched uncompensated GM tube with 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)

Range Switch

  • X1
  • X10
  • X100
  • Battery Check

Energy Sensitivity

  • 1000 CPM/mR/hr (Cs137).
  • 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 and beta at 150 keV with typical 75% detection efficiency.
  • Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case. Monitor 4 Energy Response.

Accuracy

  • (Reference to Cs137) – Typically ±15% from factory, ±10% with NIST Source Calibration NIST Calibration Additional

Display

  • Analog Meter holds full scale in fields as high as 100X maximum reading.
  • CPM & mR/hr scale.
  • Optional SI Scale Meter Available

Measurements

Weight M4: 200 g (7.1 oz) M4EC: 224 g (7.9 oz)

Size: 209 x 71 x 50 mm (8.2 x 2.8 x 1.9 in.)