Monitor 200

Monitor 200

The Monitor 200 measures alpha, beta, gamma, and x-rays. Its digital display shows readings in your choice of CPM, CPS, μSv/hr, mR/hr, or in accumulated counts. It has a digital, easy to read backlit display, a red count light, and a beeper that sounds with each count detected. This radiation detector device also includes an adjustable timer and a loud, customizable alert.

SPECIFICATIONS

Detector
Halogen-quenched GM tube with thin mica end window. Mica window density 1.5-2.0 mg/cm2. Effective window diameter is .360 inch. Side wall is .012 inch thick.

Operating Range

  • mR/hr – .001 (1µR) to 200 mR/hr
  • µSv/hr – .01 to 2000
  • CPM – 0 to 235,400
  • CPS – 0 to 3923
  • Total Counts – 1 to 9,999,000 counts

Energy Sensitivity
1070 CPM/mR/hr referenced to Cs137
Detects alpha down to 2.5 MeV; typical detection efficiency at 3.6 MeV is greater than 80%.
Detects beta at 50 keV with typical 35% detection efficiency.
Detects beta at 150 keV with typical 75% detection efficiency.
Detects gamma and x-rays down to 10 keV typical through the window, 40 keV minimum through the case.
(Ref to Cs137)

Accuracy of Radiation Detector Device
Referenced to Cs137
Typically ±15% from factory, ±10% with NIST Source Calibration NIST Calibration Additional

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

Selectable Alert Set Range
mR/hr .001 – 100 and CPM 1 – 350,000. 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.

Display
Graphic LCD with Backlight.

Outputs
USB for use with Free Observer USB Software for PCs
Bluetooth Option Additoinal: 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)

Humidity
10% to 70% Non-Condensing.

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

Weight
181 g (0.4 lbs.)

APPLICATIONS

Surveying for NORM (Naturally Occurring Radioactive Material) contamination, Gross wipe counting, Contamination surveys of packages, equipment, people, etc., Regulatory inspections, Scrap Metal Screening, Low energy radionuclide detection.

Additional information

Volume

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