Monitor MC1K

MC1K Radiation DetectorThe new ergonomic MC1K is a handheld survey meter using a built-in energy compensated GM detector. It detects gamma and x-rays up to 1000 mR/hr over 4 selectable ranges. The energy compensated Geiger counter affords the detector a more linear response to gammas and x-rays over the full range. A beep sounds and a count light flashes with each event detected.

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Energy compensated halogen-quenched GM tube.

Operating Range

X1 position 0 – 1 mR/hr or 0 – .01 mSv/hr
X10 position 1 – 10 mR/hr or 0 – .1 mSv/hr
X100 position 5 – 100 mR/hr or 0 – 1 mSv/hr
X1000 position 50 – 1000 mR/hr or 0 – 10 mSv/hr

Range Switch

X1, X10, X100, X1000.



MC1K Energy Sensitivity

Detects gamma and x-rays down to 40 keV. Response is flat from 40 keV up. Normal background, approximately 4 CPM.


Typically ±15% of reading (Cs137)


Meter will hold at full scale in fields as high as 100 times the maximum reading.

MC1K Energy Response

Audio Indicator

Internally mounted beeper (can be turned off for silent operation).


Headphone, 3.5 mm jack with pulse out.


Carrying Case (included), Optional Observer Serial Software

Limited Warranty

1 year limited warranty

Power Requirements

9-volt alkaline battery (included). Approx. 2,000 hrs at normal background radiation levels.

Temperature Range

-20° to 55° C (-4° to 131° F).


217 g (7.7 oz)


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