MC1K Geiger Counter


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MC1K Handheld Radiation Alert® Detector

mc1k-meter.jpgThe MC1K uses a built-in energy compensated GM detector, and is much higher ranging than the standard Monitor 4, from which its design is otherwise based.  It detects Gamma and X-rays up to 1000 mR/hr over 4 selectable ranges.  A beep sounds and a count light flashes with each event detected.

So in exchange for the higher operating range, prepare to give up some sensitivity on the lower end, but among our selection, the MC1K is all but alone in detecting higher ranging levels of radioactivity.

Having said that, the MC1K is still sensitive to background radiation, registering about 5 to 8 CPM at sea level.

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Energy compensated halogen-quenched GM tube

Radiation Detected Gamma and X-ray

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 (referenced to Cs-137)

Operating Ranges

0 to 1000 mR/hr and 0 to 10 mSv/hr

Range Switch X1, X10, X100, X1000


At factory to NBS standard Cesium 137 gamma source


Holds full scale in fields as high as 100X maximum reading

Power Required

One 9-volt alkaline battery (included in price of the unit)

Battery Life

Up to 2,000 hours use at normal background levels

Temperature Range

- 20° to + 55° C (- 4° to + 131° F)


188 grams (6.4 oz.) without battery


206 x 71 x 48 mm (8.1 x 2.8 x 1.9 in.)


LED indicator, internally mounted audible beeper for count rate

Warranty One year limited

Country of Make