Monitor MC1K

Monitor MC1K

The MC1K is an ergonomic 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.


Energy compensated halogen-quenched GM tube.

Operating Range
X1 position 0 – 1 mR/hr or 0 – 0.01 mSv/hr
X10 position 1 – 10 mR/hr or 0 – 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.

Reference to Cs137
Typically ±15% from factory, ±10% with NIST Source Calibration NIST Calibration Additional

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

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

3.5 mm jack with pulse out.

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

Temperature Range
-10° to +50°C (14° to 122°F)

10% to 70% Non-Condensing.

217 g (7.7 oz)

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


Expanded Range up to 1000 mR/hr, Linear Response needs with Energy Compensation, Checking accelerator & x-ray shielding for leakage, Checking industrial gauges; such as moisture, density, or level gauges containing Cesium-137, Locating lost sources, Personal protection, General surveying.

Additional information


453g (1lb) (case of 6), 6.8kg (15lb), 13.6kg (30lb)