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Ranger EXP Radiation Survey Meter


The Ranger EXP Radiation Survey Meter is a maximum performance handheld Geiger counter that offers excellent sensitivity to NORM and low levels of alpha, beta, gamma, and x-rays.

  • Quantity: 1/cs


The Ranger EXP Radiation Survey Meter is a lightweight, rugged nuclear radiation detector.

SE International designed the Ranger EXP specifically for individuals operating in tough environments.

It has a digital display that shows readings. This is accompanied by a red count light and a beeper that sounds with each count detected. Other features include an adjustable timer, selectable alert. Additionally, with the free Observer USB Software Family, you can download your collected data, and set alarms!

Application & Uses

  • Surveying for NORM (Naturally Occurring Radioactive Material) contamination
  • Contamination surveys of packages, equipment, people, etc.
  • Regulatory inspections
  • Scrap Metal Screening
  • Low energy radionuclide detection
  • Detector


RAP-RS2 Probe – External Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.75 in.).

Operating Range

mR/hr – .001 (1µR) to 100 CPM – 0 to 350,000 µSv/hr – .01 to 1000 CPS – 0 to 5000 Total Counts- 1 to 9,999,000 counts

Energy Sensitivity

  • Detects
    • Alpha down to 2 MeV.
    • Beta down to .16 MeV; typical detection efficiency at 1 MeV is approx. 25%.
    • Gamma down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs).


  • Smallest detectable level for 125I is .02 µCi at contact.



Reference to Cs137 Typically ±15% from factory, ±10% with NIST Source Calibration

Built in Efficiencies

  • Sulfur (35S)
  • Strontium (90Sr/y)
  • Cesium (137Cs)
  • Phosphorus (32P)
  • Carbon (14C)
  • Iodine (131I)
  • Cobalt (60Co)
  • Alpha


Selectable Alert Set Range

mR/hr .001 – 100 and CPM 1 – 350,000. 70db @ 1m. Pulsating beeper sounds the alert. Device uses adjustable alert levels for mR/hr / CPM, and µSv/hr / CPS. Alarm will sound when in Timer Mode when set alarm threshold is reached.


Meter will hold at OVER RANGE in fields as high as 100 times the maximum reading.

Averaging Period

Display updates every 3 seconds. At low background levels, the update is the average for the past 30-second time period. The timed period for the average decreases as the radiation level increases.

This product meets the requirements for the California Standardized Equipment List – SEL 4.1.5
SURVEY METER, COMBINATION, GAMMA-BETA-ALPHA: Will survey for Alpha, Beta, and Gamma, and Includes performance of items # 4.1.1, 4.1.2 and 4.1.3 in one unit. If selected, one unit will satisfy requirement for 4.1.1, 4.1.2 & 4.1.3.

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Need More Information?

SE International manufactures the Ranger EXP Radiation Survey Meter.

For more information about the Ranger EXP Radiation Survey Meter, contact us today!

Additional information

Weight 3 lbs
Dimensions 10 × 10 × 10 in