Radalert 200™ Radiation Survey Meter for First Responders

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First Responders appreciate the Radalert 200 slide switches – Intuitive and Easy to Operate with firefighting gloves and other PPE.

The Radalert 200 is a rugged solution for monitoring both ambient and elevated levels of ionizing radiation in challenging environments. Simplified user interface requires minimal training. Detects and measures alpha, beta, gamma, and X-radiation. Data is displayed in your choice of counts per minute (CPM), μSv/hr or mR/hr, or in accumulated counts. A red LED blinks and a beeper chirps with each count (can be muted). An audible alert sounds when the radiation reaches a user adjustable level.

  • Detect potential hazards immediately
  • Minimize personal radiation exposure
  • Monitor an area or perimeter
  • Detect radiation leaks
  • Detect concealed radioactive materials
  • Survey Transportation Incidents
  • Protect your community during radiological incidents
  • Ensure regulatory compliance
  • Support Hazmat operations

*** Please note that International Medcom can customize the label with your department logo on request.

Download Radalert 200 Specifications

Halogen-quenched Geiger-Mueller detector (LND 712)
Mica end window density is 1.5–2.0 mg/cm2
Side wall is 0.012″ #446 stainless steel
Detects Alpha, Beta, Gamma, and X-radiation

4-digit liquid crystal display with mode indicators

Operating Range:
µSv/hr: .000 to 2000
mR/hr: .000 to 200
CPM: 0 to 350,000
CPS: 0 to 3,500
Total: 0 to 9,999,000 counts

Cesium-137 (gamma)

Gamma Sensitivity:
1,200 CPM/mR/hr referenced to Cs-137

±10% typical; ±15% maximum

Alert Range:
µSv/hr: .001 to500
mR/hr: .001 to 50
CPM: 1 to 350,000
CPS: 1 to 3,500
Beeper sounds the alert

Can set sampling periods of 1 minute to 40 hours

Averaging Periods:
Display updates every 3 seconds, showing the average for the past 60-second time period at normal levels. The averaging period decreases as the radiation level increases.

Count Light:
Red LED flashes with each count

Beeper chirps for each count (can be muted)


  • Output: Stereo 3.5 mm jack sends signal to standard headset, computers, data loggers: Nominal 6V pulse 1 kOhm impedance.
  • Input: 2.5 mm mono jack provides calibration input. 0–3.3 V, > 5 µs width, rising edge triggered.

Readout holds at full scale in fields up to 100 times the maximum reading

Temperature Range:
-20° to +50° C , -4° to +122° F

1 AA alkaline battery provides over 2,000 hours of battery life at normal background radiation levels (3 to 6 months of continuous use is typical).

150 x 80 x 30 mm (5.9″ x 3.2″ x 1.2″)

225 grams (8 oz) including battery

Certified; Emissions: EN 55011:2009 +A1:2010 (Class B emissions limits); EN 61326-1:2006 (Class B) RF Emissions; Immunity: EN 61326-1:2006 (Annex C) Portable Test and Measurement Equipment; EN 61000-4-2:1995 (ESD); EN

Optional Accessories:
Computer Software and Cable; Red Protect® Boot; Wall Mount
Holder; GeigerLink™ Kit

Specifications subject to change without notice.

Please remember to use caution when handling or working around radiation sources and radioactive materials.

Please note: Radalert ® and Protect® are registered trademarks of International Medcom.

Download Radalert 200 Specifications


International Medcom is passionate about quality and customer satisfaction. We provide the best radiation detector warranty available anywhere.

This product is warranted to the original owner to be free from defects in materials and workmanship for two years from the date of purchase with the exception of the Geiger-Mueller tube, which is warranted for one year. The battery is not included in this warranty. IMI-International Medcom, Inc. will, at its own discretion, repair or replace this instrument if it fails to operate properly within this warranty period provided that it has not been subjected to misuse, abuse, or neglect. Modification or repair of this instrument by anyone other than IMI voids this warranty.

Contamination of this instrument with radioactive materials voids this warranty. Contaminated instruments will not be accepted for servicing at our repair facility.

The user is responsible for determining the suitability of this product for the intended application. The user assumes all risk and liability connected with such use. IMI is not responsible for incidental or consequential damages arising from the use of this instrument.

The terms of this warranty are subject to change without notice.



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