SE International Radiation Detector
 
Monitor 4& 4EC Handheld Radiation Alert® Detector w/ Mini-USB Option
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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 Monitor 4 without USB option.

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 default. Optional SI Meter Scale option available upon request.
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.

Observer USB Software Operating Range
ObserverUSB
0-.5, 0-5, 0-50 mR/hr
0-500, 0-5,000, 0-50,000 CPM or 0-500 µSv/hr
0-50 mR/hr.
Range Switch
X1, X10, X100, Battery Check.
Accuracy
Typically ±15% of reading (referenced to Cs137)

Monitor 4

Monitor 4EC
Mini-USB Port on Side of Unit
Monitor 4 End Window

Audio
Internally mounted beeper (can be turned
off for silent operation).
Power Requirements
9-volt alkaline battery up to 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, Observer Software, Mini-USB Cable
Accessories
SI Meter Option
Limited Warranty
1 year limited warranty
Monitor 4 Kits
Build your own Monitor 4! Learn about how a geiger counter works!

Included Accessories

Support

Monitor 4 & 4EC Operation Manual (pdf)| English | Spanish | French | Quick Specs

 

 

S.E. International, Inc.

P.O. Box 39, 436 Farm Rd. Summertown, TN 38483
1.800.293.5759 | 931.964.3561 | Fax: 1.931.964.3564
www.seintl.com | radiationinfo@seintl.com

RADIATION ALERT® Quality Handheld Radiation Detectors, Gieger Counter, & Radiation Spectrum Analyzers are engineered
to be reliable, simple to use, affordable and made in the USA.
For ordering and pricing, Call 1-800-293-5759.
Inspector, Monitor 4, and Abacus are trademarks owned by S.E. International, Inc.