Ranger Geiger Counter

Ranger Geiger Counter

Your Price:
$574.00 (You save $11.00)
1.70 LBS
  • Product Description

    The 'Radiation Alert' Ranger Pocket Geiger Counter is now smaller, more ergonomic, and with better features, all for the same price!  The Ranger features a new interface with touchpad technology.  Included with each instrument for no extra charge is a protective boot, carrying case and stand that holds the instrument upright for hands-free operation!

    The Ranger offers maximum performance in a lightweight, rugged solution for surveying at the facility or in the field. The Ranger has been designed for industrial environments, but it still has all of the features you’ve come to love in the lab. 

    • Small, handheld, microprocessor-based instrument
    • Excellent sensitivity to low levels of Alpha, Beta, Gamma, and X-rays
    • Backlit digital display
    • Red count light
    • Audible Beeper that sounds with each count detected, providing instant indications of the radiation level.
    • Selectable alert levels
    • Adjustable timer for performing Timed Counts
    • Built in efficiencies for common isotopes to calculate activity in Bq and DPM. (Important: The Ranger does not identify isotopes - to use this feature,  you must know the isotope in advance).
    • Internal memory, data logging, and USB connectivity
    • Free Observer USB Software to download your data, set computer alarms, and calibrate your instrument!
    • Bluetooth for use with the Free Observer BLE App for Android.
    • Optional wipe test plate for swipes.




        Internal Halogen-quenched, uncompensated GM tube with thin mica window, 1.4-2.0 mg/cm2 areal density. Effective diameter of window is 45 mm (1.77 in.).       

    Operating Range

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


        (Referenced to Cs137)     Typically ±15% from factory, ±10% with NIST Source Calibration

    Energy Sensitivity

        Detects Alpha down to 2 MeV. Detects Beta down to .16 MeV; typical detection efficiency at 1 MeV is approx. 25%. Detects Gamma down to 10 KeV through the detector window. 3340 CPM/mR/hr (137Cs). Smallest detectable level for 125I is .02 µCi at contact.                 

    Built-In Efficiencies

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

    Selectable Alert Set Range

        mR/hr .001 - 50 and CPM 1 - 160,000. Pulsating beeper sounds the alert. Adjustable alert levels are used for mR/hr / CPM, and µSv/hr / CPS. 70db @ 1m. 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 Periods

        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.


        Graphic Display with Backlight

    Count Light

        Red LED flashes with each radiation event

    Audio Indicator

        Internally mounted beeper (can be switched off for silent operation)

    Data Logging Capacity

         5,452 data points, which at 1 minute intervals as an example, equates to 3.7 days


        USB for use with Free Observer USB Software for PCs

    Power Requirements

        Two AA alkaline batteries (included)


        140 X 68 X 33 mm (5.5 X 2.7 X 1.3 in.)


        Carrying Case, Xtreme Boot, Stand, Mini-USB Cable, Observer USB Software Download , Certificate of Conformance


    Wipe Test Plate, Swipes, NIST Calibration

    Limited Warranty

    1 year limited warranty


    Click on this link for the:

    Ranger Operating Manual



    Energy Response Curve












  • Product Reviews


    Write A Review

    1. A Quality Radiation Detector Well Worth the Price

      Well made, easy to use, accurate, and comes with features not found on other units in this price range. For one, menu choices allow extra analysis of known isotopes. The included "Xtreme Boot" is another bonus included. SE International's Ranger is my first choice in radiation detectors. In its price range, I have found no others that compare. Highly recommended, for sure! on Jun 17th 2020

    2. Ranger

      Having owned many of the Civil Defense era geiger counters I was impressed when I received my Ranger. It is very easy to use in a nice compact package. My uses will be mostly background monitoring but I wanted the capability for decontamination checks if it is ever needed. The software hook up to a computer looks like it will be very useful for charting trends. on May 12th 2017

  • Find Similar Products by Category