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SE International Monitor 4 Handheld Radiation Alert Detector
Item #:
MONITOR-4
Brand:
SE International
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Monitor 4 Handheld Radiation Alert Detector by SE International
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.
Both Detect beta at 50 keV with typical 35% detection efficiency and beta at 150 keV with typical 75% detection efficiency.
Monitor 4:
Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%. Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
Monitor 4EC:
Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%. Detects gamma and x-rays down to 10 keV typical through the window (non-compensated), 40 keV through the sidewall.
| Detector | Monitor 4: 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.). Monitor 4EC: Halogen-quenched GM tube, energy compensated sidewall 2mm tin filter. Thin mica window 1.5-2.0 mg/cm2 thick. Effective diameter of window is 9.1 mm (.36 in.). |
| 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 | 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. |
| 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 |
| Accuracy | Typically ±15% of reading (Cs137) |
| 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! |
