GCA-04W	GCA-04 (Internal Tube)

Three Radiological Instruments in One.

Survey Meter
Takes real time radiation readings and displays the count/second and equivalent radiation level in either Imperial mR/hr or Metric mSv/hr. These are real time one second interval readings for count with three second averaging on radiation level. Count readings will fluctuate second by second, because it displays the actual number of radioactive particles detected in comparison to analog meter counters that average radioactivity levels.

Background Radiation Monitor
Take 1 minute or 5 minute readings. Displays accumulated count and equivalent background radiation in either uR/hr or uSv/hr.

Scientific Instrument & Industrial Tool

Our Digital Geiger counters are calibrated using CS-137 Gamma source are NRC certified ready (optional).

Suitable for educational institutions as well as industry. Free Windows radiation graphing and recording programs, see below. Graphic Filesmay be exported to Excel spreadsheets.

Applications:

• Education - Classroom demonstrations and experiments
• Emergency Services and Domestic Preparedness
• HAZMAT and Compliance Verification
• Dirty Bomb Screening and EMT's

The GCA-07 and GCA-04 Digital Meter Geiger Counters are NRC certification ready. They provide both a high accuracy count (CPS/CPM) and equivalent radiation level on the LCD display. The NRC certifications are available at additional cost*. All Digital Geiger counters includes windows pulse counting and radiation graphing program. PC graphing program can import and export data.

See NRC Calibration & Certification Page Here.

All Digital Geiger Counters are factory calibrated. We also offer calibration services & upgrades for our digital geiger counters.

The high contrast Liquid Crystal Display (LCD), 16 character by 2 lines, provides an easy to read output, see imagebelow.

Secondary indicators; audio (clicks) and visual (LED) included. Also includes a headphone jack and a power jack for external power.

Both Digital Geiger Counters GCA-07 and GCA-04 outputs the counts per second to our Windows PC program for charting and recording the measured radiation over time (see WIN XP screen shot). Saved graphic data files may be imported into Microsoft Excel.

Both Digital Geiger Counters GCA-04 and GCA-04W outputs serially via RS-232 the counts per second to our Windows PC program for charting and recording the measured radiation over time (see WIN XP screen shot). Saved graphic data files may be imported into Microsoft Excel.

Digital Geiger Counter Technical Data

Radiation Detected    Alpha, Beta, Gamma and X-Rays.

Detector       Geiger-Muller tube Ne + Halogen filled with a .38" effective diameter 1.5-2.0 mg/cm2 mica end window.

Detector      · Alpha above 3.0 MeV
Sensitivity   · Beta above 50 KeV
                  · Gamma above 7 KeV

Countable Pulse Resolution & Range         1 Count Per Minute (CPM) - 3500 Counts Per Second (CPS)

Radiation Resolution & Range                   1.0 uR/hr - 500 mR/hr
          (Metric)                                        0.01 uSv/hr - 5.0 mSv/hr

LCD Display 16 character by 2 line LCD (liquid crystal display) with back light provides easy to read output. Secondary indicators; audio (clicks) and visual (LED) included. Also includes a headphone jack.

GCA-04 Standard RS-232 output for PC available via DB-9 serial.
GCA-07 USB Cable included

Power 9 volt battery Or AC Adaptor for extended operation

Case Size 7.5" x 4.1" x 1.2" .PDF Drawing(50K)

LCD Display

Survey Meter Mode                          Background Radiation Monitor Mode
Download Digital Geiger Counter charting software for Windows XP (3 MB).
Download Digital Geiger Counter charting software for Windows 98 (3 MB).
for non-commercial use only*

Click here to see experiment measuring radioactive decay of TV screen dust.

Software Manual(PDF file 1.9 meg)

On Line Interactive Software Tutorials

Geiger Graph Software - Turn your Geiger Counter Setup into a Radiation Monitoring Station

The GCA-04W is also availabe to rent. Read More >

* Commercial Applications must be licensed

Optional Belt Clip

These radiation shields friction fit on the open end of the Geiger Counter wand. Each shield helps to block radiation from reaching the internal GM tube inside the wand.

The shields are useful in performing nuclear tests and experiments.

The Screen shield is an open mesh nylon screen that allows all radiation including alpha to pass through. The paper shield blocks alpha radiation, while permitting beta and gamma radiation. The aluminum shield attenuates beta radiation and the lead shield attenuates gamma radiation. Shields may be purchased separately or in a set.