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S.E. International- Radiation Alert Monitor 200 Multi-purpose radiation detection.

A portable, multi-purpose radiation detector designed to accurately measure alpha, beta, gamma, and X-ray radiation for environmental, laboratory, and safety monitoring.

  • Wide Radiation Detection: Detects alpha, beta, gamma, and X-ray radiation using a halogen-quenched GM tube with thin mica window.
  • Broad Measurement Range: Measures dose rate, CPM/CPS, and total counts, suitable from background levels to high radiation fields.
  • User-Friendly Alerts & Display: Features audible/visual alarms, graphic LCD with backlight, and real-time count indicators.
  • Portable & Connected: Lightweight, long battery life, with USB and Bluetooth support for PC and mobile data logging.

Description

The S.E. International Radiation Alert Monitor 200 is a versatile, multi-purpose radiation detection device designed for professionals requiring reliable measurement of alpha, beta, gamma, and X-ray radiation. It utilizes a halogen-quenched GM tube with a thin mica end window for sensitive detection, offering dose rate readings from 0.001 to 200 mR/hr and total counts up to 9,999,000. With adjustable alert thresholds, pulsating beeper notifications, and selectable units in mR/hr, µSv/hr, CPM, or CPS, it provides both flexibility and precision for a wide range of monitoring scenarios.

Engineered for portability and ease of use, the Monitor 200 features a graphic LCD display with backlight, a red LED count indicator, and audible click per count. Data can be accessed via USB using the Observer software or through Bluetooth on Android devices. Lightweight at 181 g, it operates on USB power or two AA batteries with approximately 800 hours of battery life. This monitor is ideal for detecting surface contamination, monitoring exposure to radionuclides, screening environmental contamination, and identifying low-energy radioactive gases, making it suitable for industrial, laboratory, and field applications.

Features

  • Wide Radiation Detection: Detects alpha, beta, gamma, and X-ray radiation using a halogen-quenched GM tube with thin mica window.
  • Broad Measurement Range: Measures dose rate, CPM/CPS, and total counts, suitable from background levels to high radiation fields.
  • User-Friendly Alerts & Display: Features audible/visual alarms, graphic LCD with backlight, and real-time count indicators.
  • Portable & Connected: Lightweight, long battery life, with USB and Bluetooth support for PC and mobile data logging.

Specifications

Detector

Parameter Details
Detector Type Halogen-quenched GM tube with thin mica end window
Mica Window Density 1.5 – 2.0 mg/cm²
Effective Window Diameter 0.360 in
Side Wall Thickness 0.012 in

Operating Range

Measurement Range
Dose Rate (mR/hr) 0.001 (1 µR) – 200 mR/hr
Dose Rate (µSv/hr) 0.01 – 2000
CPM 0 – 235,400
CPS 0 – 3,923
Total Counts 1 – 9,999,000 counts

Monitor 200 Detector Window


Energy Sensitivity

Parameter Details
Sensitivity Reference 1070 CPM/mR/hr (¹³⁷Cs)
Alpha Detection Down to 2.5 MeV; >80% efficiency at 3.6 MeV
Beta Detection (50 keV) ~35% typical efficiency
Beta Detection (150 keV) ~75% typical efficiency
Gamma / X-ray Detection Down to 10 keV through window; 40 keV minimum through case
Reference Source ¹³⁷Cs

Accuracy

Parameter Details
Accuracy Referenced to ¹³⁷Cs
±15% typical from factory
±10% with NIST source calibration

Anti-Saturation

Feature Details
Overrange Behavior Readout will OVERRANGE in radiation fields up to 100× maximum reading

Selectable Alert Settings

Parameter Details
Alert Range mR/hr: 0.001 – 100
CPM: 1 – 350,000
Alert Type Pulsating beeper
Adjustable Units mR/hr / CPM and µSv/hr / CPS
Sound Level 70 dB @ 1 m
Timer Mode Alarm sounds when preset threshold is reached

User Interface

Feature Details
Display Graphic LCD with backlight
Count Light Red LED flashes with each count
Audio Indicator Audible click per count (can be disabled)

Outputs

Interface Details
USB Free Observer USB software for PC
Bluetooth Free Observer BLE app for Android

Power Requirements

Parameter Details
Power Source USB power or 2 × AA alkaline batteries (included)
Battery Life Approx. 800 hours at background

Environmental Conditions

Parameter Details
Operating Temperature −10°C to +50°C (14°F to 122°F)
Humidity 10% – 70% RH, non-condensing

Physical Characteristics

Parameter Details
Dimensions 140 × 68 × 33 mm (5.5 × 2.7 × 1.3 in.)
Weight 181 g (0.4 lbs.)

Included Accessories

Item
Carrying case
Xtreme Boot
Lanyard
Stand
Batteries
Mini-USB cable
Observer USB software download
Observer BLE app
Certificate of conformance

Options

Option
Water-resistant case
NIST calibration

Warranty

Coverage
1-year limited warranty

Applications

  • Detecting and measuring surface contamination
  • Monitoring possible radiation exposure while working with radionuclides
  • Screening for environmental contamination
  • Detecting noble gases and other low energy radionuclides

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Please fill in the request form below and one of our engineers will contact you to discuss your system requirements and if we can help, our typical response time is within 1 – 3 working day.