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Radiation Alert Ranger Detector

The Radiation Alert Ranger Detector offers maximum performance in a lightweight, rugged nuclear radiation detector for surveying at the facility or in the field.

For pricing, please call 1-800-952-3293 or email




Introducing the Radiation Alert Ranger, the pinnacle of nuclear radiation detection technology that seamlessly combines performance with unparalleled portability. Whether you’re surveying facility or venturing into the field, the Radiation Alert Ranger® stands as a reliable companion, designed with industrial environments in mind while retaining all the features cherished in laboratory settings.

Compact and lightweight, the Radiation Alert Ranger® is a handheld digital survey meter that sets the bar for sensitivity across alpha, beta, gamma, and x-rays ensuring comprehensive coverage for your radiation detection needs.  Equipped with built-in efficiencies for common isotopes, this model goes the extra mile by calculating activity in Becquerels (Bq) and Disintegrations Per Minute (DPM).

The Radiation Alert Ranger boasts a user-friendly interface featuring a backlit digital display, a red count light, and a distinctive beeper that signals each count detected, enhancing your ability to respond promptly to radiation levels. Selectable alert levels, an adjustable timer, and an optional wipe test plate for swipes provide further flexibility. allowing you to tailor the device to you specific requirements.

  •  Free Observer USB Software
  • Free Observer BLE Software For Use With The Optional Bluetooth Module

But the Radiation Alert Ranger doesn’t stop there.  Included with your purchase is the Free Observer USB Software(compatible with Windows only), enabling you to effortlessly download and manage your data while setting up computer alarms for added convenience.

For an enhanced experience, the optional Bluetooth module opens up a world of possibilities.  The Radiation Alert Ranger® seamlessly integrates with the free Radiation Alert Observer BLE app available for download from the Google App Store.  This app empowers you to display real-time readings with descriptions, conduct timed counts, append GPS data, and send your saved survey files. What’s more, any alarms set on the instrument will be mirrored on you android device, ensuring you stay informed and in control.

Elevate your radiation detection capabilities with the Radiation Alert Ranger- where cutting-edge technology meets user-friendly design, providing peace of mind whether in the lab, facility, or in the field.

Each Ranger include a rubber boot, stand, lanyard, USB cable, 2 AA batteries and software


Additional information

Weight N/A



Detector Internal Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density
Operating Ranges mR/hr: .001 to 100
nSv/hr: .01 to 1,000
CPM: 0 to 350,000
CPS: 0 to 5,000
Total Timer: 1 to 9,999,000 counts
Averaging Periods Display will update every 3 seconds, at low background levels, the update is the moving average for the past 30 second time period, the timed period for the moving average decreases as the radiation level increases
Built In Efficiencies 35Sulfer (S35), 90Strontium (Sr/y90), 137Cesium (Cs137), 32Phosphorus (P32), 14Carbon (C14), 131Iodine (I131), 60Cobalt (Co60) and Alpha
Accuracy (Cs137) Typically ±15% from factory, ±10% with NIST Source Calibration
Energy Sensitivity Alpha down to 2 MeV
Beta down to .16 MeV, Typical detection efficiency at 1 MeV is about 25%
Gamma down 10 KeV through the detector window, smallest detectable level for I125 is .02 µCi at contact
Anti Saturation Readout will over range in radiation fields as high as 100 times maximum reading
Alert mR/hr: .001 to 100
CPM: 1-350,000
Display Backlit LCD with mode indicators
Count Light Red LED flashes with each count
Audio Indicator Internally mounted beeper, can be switched to silent mode
Power 2 AA alkaline batteries, battery life about 1,000 hours
Outputs Bluetooth BLE for Observer BLE (RadResponder Ready)
USB for use with Observer USB Software family
Size 5.5″ x 2.7″ x 1.3″, .64 pounds


Radiation Alert Ranger Detector Datasheet

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