Item #: 4EC

Monitor 4EC

MONITOR 4EC is a compact, 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 accurate linear reading for gamma and x-rays (above 40 keV).

Detects beta at 50 keV with typical 35% detection efficiency and beta at 150 keV with typical 75% detection efficiency.

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.


  • Carrying Case w/ Belt Clip
Detector: Halogen-quenched GM tube, energy compensatedsidewall 2mm tin filter. Thin mica window 1.5 - 2.0mg/cm2 thick. Effective diameter of window is 9.1 mm(.36 in.)
Display: Analog Meter holds full scale in fields as high as 100Xmaximum reading. CPM & mR/hr scale. OptionalSI Scale Meter Available - Call for Details
Energy Sensitivity: 1000 CPM / mR / hr (Cs-137). Gama and x-raysthrough 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 keVto 1.3 MeV.
Operating Range: 0-.5, 0-5, 0-50 mR/hr0-500, 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 (Cs-137)
Audio Indicator: Internally mounted beeper (can be turned off forsilent operation).
Temperature Range: -20° to 55° (-4° to 131°F)
Weight: 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-USBOption w/ USB Observer SoftwareCALL FOR MORE DETAILS
Limited Warranty 1 year limited warranty
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