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DX-1 Geiger Counter

1.00 LBS
  • Product Description

    The DX-1 Radiation Monitor detects Beta, Gamma, and X-radiations.  The counter emits audible clicks from its internal loudspeaker and registers radioactivity on a compressed scale analog meter (see right) up to 10 mR/hr, compacting several ranges into one, available at a glance.

    In addition to the audible clicks, at high radiation levels, the speaker beeps, indicating obvious danger. The beeping begins at about 20 mR/hr, with intervals between beeps decreasing in relation to field strength, becoming a continuous tone at 200 mR/hr.  Play this sound file.

    The DX-1 includes an easily replaceable, yet long-lasting 9 volt battery.  A single pushbutton activates the DX-1 only when needed, as seen in the picture above, and thus conserves battery power. An LED indicator reassures you of battery condition upon each use.  The DX-1 is ruggedly constructed and continues to operate in a saturation environment.  Select the navigation button above, or click here to see detailed Specifications on the DX-1 Pocket Geiger Counter.

    The DX-1 is a good Pocket Geiger Counter - affordable, simple to use, and all that is needed for a basic determination of whether or not something is radioactive.  Purchase the DX-1 below, or if you would like to consider the similar, but higher ranging DX-2 model, select the navigation button above, or click on this link.

    This item typically ships within 1 business day.


    Specifications for the DX-1 Pocket Geiger Counter:


    Detector Type


    Halogen-quenched Geiger-Mueller tube with thin metal window

    Detector Size 3/4" diameter x 3" long
    Radiation Detected Beta, Gamma, X-ray



    Unique logarithmic-scale analog meter


    Operating Range


    0 to 10 mR/hr. range on analog meter

    Sensitivity Detects Beta at 35 keV with 90%      efficiency, or                                at 1,000 keV with 100% efficiency       Detects Gamma down to 6 keV at 25% efficiency, or                                to 35 keV at 90% efficiency, or                                to 100 keV at 100% efficiency



    "Fixed" at factory to NBS, NIST, and NRC standards using      Cesium-137 gamma source


    Example of Isotopes Detected


    14C; 32P; 125I; Co (almost all beta and gamma emitters)


    Power Required


    One 9-volt battery NEDA #1604 or equivalent


    Battery Life


    Up to 50 hours use at normal background levels


    Temperature Range


    - 10° to + 45° C (14° to + 113° F)




    212 grams (7.5 oz.) with battery




    168 mm x 83 mm x 25 mm (6 5/8" x 3 1/4"x 1 3/8")




    LED “ON” indicator and Audio click for count rate

    Extra Audible Alert Beeping at 20 mR/hr, continuous tone at 200 mR/hr.
    Warranty One Year on Geiger-Mueller tube,      Five Years on electronics
    Country of Make USA
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