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The M4 and M4EC 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. The Monitor 4EC offers a more linear reading for gamma and x-rays (above 40 keV).Click here for Original Monitor 4. Click here for USB Model.Specifications
Detector
Monitor 4: Halogen-quenched uncompensated GM tube with thin mica window 1.5-2.0 mg/cm2 thick.
Monitor 4EC: Halogen-quenched GM tube, energy compensated sidewall 2mm tin filter. Thin mica window 1.5-2.0 mg/cm2 thick.
Display
Analog Meter holds full scale in fields as high as 100X maximum reading. CPM & mR/hr scale. Optional SI Scale Meter Available
| Energy Sensitivity: |
Operating Range |
1000 CPM/mR/hr (Cs137). 4EC is the same as M4 except the energy response for gamma and x-rays through the detector sidewall is flat 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.
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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.
Accuracy
Typically ±15% of reading(Cs137) |
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Monitor 4
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Monitor 4EC
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Audio Indicator
Internally mounted beeper (can be turned off for silent operation).
Power Requirements
9-volt alkaline battery. Approx. 2,000 hrs. at normal background
Temperature Range
-20° to 55°C (-4° to 131°F)
Weight
M4: 200 g (7.1 oz)
M4EC: 224 g (7.9 oz)
Outputs
3.5 mm headphone jack with pulse out.
Size
209 x 71 x 50 mm (8.2 x 2.8 x 1.9 in.)
Includes
Carrying Case w/ Belt Clip
Options
SI Meter Option, Observer Software, Mini-USB Option w/ USB Observer Software
Limited Warranty
1 year limited warranty
Monitor 4 Kits
Build your own Monitor 4! Learn about how a geiger counter works!
Accessories |
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