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.
Applications & Uses: 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.
Features
Internal memory and the free Observer USB Software (Windows® only) allow you to download your data, and set computer alarms.
With the optional Blue Tooth module you can download Free Radiation Alert® Observer BLE app from the Google App Store, where you can display the readings from your detector on your android device, label sample readings and descriptions, take timed counts, append GPS data and send your saved survey file. Alarms set on the instrument will also activate on your android device.
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)Monitor 200 & Monitor 4 Energy Response To Gamma 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.
