Monitor 1000EC

Monitor 1000EC

The Monitor 1000EC is an energy compensated radiation detector that measures gamma, and x-rays. Perfect for most applications requiring an energy compensated detector. Users can choose from readings of CPM, CPS, µSv/hr, mR/hr, or in accumulated counts. It has a red count light, a beeper that sounds with each count detected, and includes an adjustable timer, and selectable alert.

Free Radiation Alert® Observer BLE app from the Google App Store, where you can display the readings from your detector, label sample readings and descriptions, take timed counts, append GPS data and send your saved survey file. This radiation detector helps you to set alarms which will also activate if you sync it with your android device. .

This radiation detector device include Free Observer USB software (Windows® only) reads in Total Counts, CPM, µR/hr, mR/hr, CPS, µSv/hr, and has the ability to collect and log data, set alarms, set timed counts, set the calibration date and settings, and generate reports.


Energy Compensated Halogen-quenched GM tube.


  • mR/hr – .001 (1µR) to 1000 mR/hr
  • µSv/hr – .01 to 10000
  • CPM – 0 to 450,000
  • CPS – 0 to 7500
  • Total Counts – 1 to 9,999,000 counts

Energy Sensitivity
450 CPM/mR/hr referenced to Cs137. Detects gamma and x-rays down to 40 keV. Response is flat from 40 keV up.

(Referenced to Cs137)
Typically ±15% from factory, ±10% with NIST Source Calibration NIST Calibration Additional

Readout will OVERRANGE in radiation fields as high as 100 times the maximum reading.

Selectable Alert Set Range
mR/hr .001 – 1000 and CPM 1 – 450,000. Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS. 70db @ 1m. Alarm will sound when in Timer Mode when set alarm threshold is reached.

Graphic LCD with Backlight.

USB for use with Free Observer USB Software for PCs
Bluetooth Wirelessly connects the instrument with an Android mobile device for use with Free Observer BLE App

Count Light
Red LED flashes with each count.

Audio Indicator
Sounds with each count (can be switched off for silent operation)

Power Requirements
USB Power or Two (2) AA alkaline batteries (included). Approx. 800 hrs @ background.

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

10% to 70% Non-Condensing.

140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.)

204 g (0.45 lbs.)


X-ray chamber inspection, 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, Linear response detection applications, General surveying.

Additional information


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