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The GCA-07 Digital Geiger Counter






NRC certifiable* accuracy

--When accuracy matters

Industrial, Medical, and Education.

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Why NRC Certification is important!

digital geiger counter gca-07w

GCA-07W Digital Geiger Counter



         1) Detects environmental radioactivity.
         2) Measures background radiation and above.
         3) Government NRC certified* accurate Digital Geiger counters
         4) Free Technical Support.


Radiation and Geiger Counter Specialists and Experts         Images SI Inc. BBB Business Review

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GCA-07 Digital Geiger Counter

GCA-07 Digital Geiger Counter (Internal Sensor)

Detects Alpha, Beta, X-rays and Gamma radiation

Compare GCA-07W and GCA-07

GCA-07W Digital Geiger Counter with Wand (External Sensor)

Detects Alpha, Beta, X-rays and Gamma radiation

Geiger Counter Software
Free Windows 7 Geiger counting software included.

Track and graph your Geiger counter's readings, save data, viewer program, Excel compatible.

High Contrast LCD

High Contrast LCD

Provides CPS/CPM data and its equivalent radiation level

External wand of the GCA-07W

External wand of the GCA-07W

.85" diameter and 5.75" long
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Basic Port
Basic Port

External Power, Head Phone, USB Serial/TTL.

Geiger Counter Power Supply
Power Supply

9VDC / 1A Output

USB to 3.5mm
USB to 3.5mm Cable

The USB TTL Serial cable provide connectivity between USB and serial UART interfaces at 5V.
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NRC Certification Available
NRC Certification Available

We don't just say our Geiger counters are accurate we can certify it.
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Example Frame

Serving a Mission of Moving Science Forward

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Digital Geiger Counter Technical Data, read more...




Detector Features:


  • NRC Certification

    With NRC certification you have a independent US gov't license laboratory testing and certifying your Geiger counter's accuracy. * NRC certifications are available at additional cost.
  • Radiation Warning Symbol


    Detects and Measures: Alpha, Beta, X-ray and Gamma Radiation

  • audio speaker output

    Audible Speaker Output

    Each radioactive particle detected produces an audible click.
    Speaker audio output may be turned on and off.

    Headphone Jack

    For private listening.
  • simple interface

    Simple User Interface

    Front panel switches provide an intuitive and easy-to-use interface for all Geiger counter functions.
  • Configurable Measurement Window

    Selectable Counts Per Second (CPS) or Counts Per Minute (CPM).
  • Free PC Graphing Software

    Free Geiger Counter Graphing Software

    For PC WIN7 operating systems. Set threshold alarms, CPS or CPM modes. Graphs in lines, bars, 3D lines and 3D bars.
  • Geiger Counter easy to read LCD display

    High Contrast LCD Screen

    Easy to read Count measurements and Equivalent radiation level. Backlight available for low light conditions.

  • Low Battery Indicator

    Low Battery Power Indicator

    External Power Supply
    (AC adapter) included.


Leading our competitors:



  • fast next day shipping

    Fast Shipping

    We ship most domestic orders by the next business day.
  • expert staff staff available to answer questions

    Expert Staff

    We can answer any questions you may have.

  • free online interactive tutorials

    Free Software and Tutorials

    Free Radiation detection and monitoring software. Online interactive tutorials see more...
  • Best Value Geiger Counter

    Value Product

    Certifiable accurate radiation detection and measurement instrument.
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Free online software updates and support pages available.

Try Before You Buy - Rentals
Images SI Inc., is a U.S. based company that manufactures and assembles in the United States.
* NRC Certification is available from an independent U.S. Government licensed laboratory at an additional cost.

Risk Free Money Back Guarantee!

If our Geiger counter doesn't meet your needs, let us know within 30 days and we will issue a UPS Merchandise Return Label, (domestic USA only) for a no hassle refund.
      Returns must be in new and unused condition.

GCA-07 - $439.95 

Digital Geiger Counter

GCA-07W - $499.95 

Digital Geiger Counter with Wand




Additional Options:
* NRC Certification - $125.00