Monitor M200 - Digital Radiation Survey Meter

Monitor M200 - Digital Radiation Survey Meter

The Radiation Alert® Monitor 200 is a compact, professional-grade radiation survey meter engineered for accurate and reliable detection of alpha, beta, gamma, and x-ray radiation. Designed to meet the demands of radiation safety officers, industrial hygienists, emergency responders, environmental monitoring professionals, and educational laboratory technicians, the Monitor 200 delivers exceptional detection performance in a rugged, portable package. Whether you're conducting routine safety checks, environmental surveys, or emergency hazmat operations, the Monitor 200 is built to perform.

Equipped with a Halogen-quenched Geiger-Mueller tube featuring a thin mica end window, the Monitor 200 offers broad-spectrum radiation detection across a wide operating range. Readings can be displayed in CPM, CPS, µSv/hr, mR/hr, or total accumulated counts, giving users the flexibility to monitor radiation in the units most relevant to their application. The large backlit LCD display ensures clear, easy-to-read measurements in all lighting conditions — from dimly lit laboratory environments to bright outdoor field settings.

Customizable audible and visual alarms allow users to set threshold alerts for immediate notification when radiation levels exceed safe limits. A red LED count indicator flashes with each detected radiation event, providing a real-time visual cue alongside the digital readout. For environments where silence is required, a silent operation mode is available.

The Monitor 200 is equipped with USB connectivity for seamless data logging and software integration with the included Observer USB Software. An optional Bluetooth® module enables wireless connectivity with mobile devices via the Observer BLE App, making it even easier to record, analyze, and share radiation data in real time. Internal memory allows users to store readings and timed counts for later review and reporting.

Powered by two standard AA alkaline batteries or USB power, the Monitor 200 offers an impressive battery life of approximately 800 hours under background radiation conditions — minimizing downtime and ensuring continuous monitoring during extended field operations. Its lightweight design (just 0.4 lbs / 181 g) and compact dimensions (5.5 x 2.7 x 1.3 in.) make it easy to carry and operate with one hand.

For applications requiring verified measurement accuracy, an optional NIST-traceable calibration is available, reducing measurement uncertainty to ±10% compared to the standard factory accuracy of ±15%.

Key Features

• Detects alpha, beta, gamma, and x-ray radiation

• Large backlit LCD display for easy viewing in all lighting conditions
• Multiple display units: CPM, CPS, µSv/hr, mR/hr, and total accumulated counts
• Adjustable audible and visual alarms with user-defined threshold settings
• Red LED count indicator flashes with each detected radiation event
• Silent operation mode for noise-sensitive environments
• USB connectivity for data logging and Observer USB Software integration
• Optional Bluetooth® module for mobile device connectivity via Observer BLE App
• Internal memory for storing readings and timed counts
• Rugged, lightweight, and portable design for field or laboratory use
• Approximately 800 hours battery life on background radiation
• Compatible with Observer USB Software and Observer BLE App
• Optional NIST-traceable calibration for enhanced accuracy

Common Applications

• Routine radiation safety monitoring and compliance
• Nuclear density gauge verification
• Environmental radiation surveys and site assessments
• Industrial radiography support and source verification
• Laboratory radiation detection and research
• Emergency response and hazmat operations
• Educational institutions and university research facilities
• X-ray leakage detection and equipment inspection
• Radioactive source location, identification, and ongoing monitoring
• Decommissioning and contamination surveys

Technical Specifications

Detector

• Type: Halogen-quenched Geiger-Mueller tube with thin mica end window
• Effective window diameter: 0.360 in (9.1 mm)

Operating Range

• 0.001 to 200 mR/hr
• 0.01 to 2000 µSv/hr
• 0 to 214,000 CPM
• 0 to 3,575 CPS
• Total counts up to 9,999,000

Sensitivity

• 1,070 CPM/mR/hr referenced to Cs-137

Accuracy

• ±15% from factory calibration
• ±10% with optional NIST-traceable calibration

Display

• Graphic LCD with selectable backlight

Power

• Two AA alkaline batteries or USB power
• Approximate battery life: 800 hours on background radiation

Size & Weight

• Dimensions: 5.5 x 2.7 x 1.3 in.
• Weight: 0.4 lbs (181 g)

Environmental Operating Conditions

• Temperature: 14°F to 122°F (-10°C to +50°C)
• Humidity: 10% to 70% non-condensing

Included Accessories

• Protective carrying case
• Rubber protective boot
• Lanyard
• Instrument stand
• Mini-USB cable
• Observer USB Software download
• Certificate of Conformance
• AA batteries

Why Choose the Monitor 200?

The Radiation Alert® Monitor 200 is the go-to choice for professionals who need a dependable, versatile, and easy-to-use radiation survey meter. Its ability to detect all four major types of ionizing radiation, combined with flexible display options, customizable alarms, and robust data logging capabilities, makes it one of the most comprehensive handheld radiation detectors available at its price point.

Whether you're a radiation safety officer managing workplace compliance, an emergency responder assessing a contamination event, or a researcher conducting environmental surveys, the Monitor 200 delivers the sensitivity, accuracy, and reliability you need. Its long battery life, rugged construction, and compatibility with both USB and Bluetooth® data solutions ensure it's ready to perform in virtually any environment.

Backed by S.E. International's decades of expertise in radiation detection, and with the option for NIST-traceable calibration, the Monitor 200 gives you the confidence to make informed decisions based on accurate, real-time radiation data.