Images SI Inc. products

THE GCA-07W DIGITAL GEIGER COUNTER is the only Geiger counter you will ever have to purchase. It has a proven track record detecting and measuring nuclear radiation in hospitals, medical research, college laboratories,industrial settings, transport containers, top soil, granite table tops, scrap metal, oil fields, objects and interior spaces. APPLICATIONS and USES: Personal radiation detection: Survey meter: Education and nuclear experiments: Emergency Services: Domestic preparedness: Post-accident response. Compliance Verification and Radiation Screening for wastes and other materials. LCD DISPLAY: The 16 x 2 character LCD displays radioactive count and radiation level in mR/hr or mSv/hr. Time selection switch allows Counts Per Second (CPS) or Counts Per Minute (CPM) mode. CASE SIZE: The GCA-07W measures 7 ½" (length) x 4.1" (width) x 1 ¼" (height).

THE GCA-07 DIGITAL GEIGER COUNTER is the only Geiger counter you will ever have to purchase. It has a proven track record detecting and measuring nuclear radiation in hospitals, medical research, college laboratories,industrial settings, transport containers, top soil, granite table tops, scrap metal, oil fields, objects and interior spaces. APPLICATIONS and USES: Personal radiation detection: Survey meter: Education and nuclear experiments: Emergency Services: Domestic preparedness: Post-accident response. Compliance Verification and Radiation Screening for wastes and other materials. LCD DISPLAY: The 16 x 2 character LCD displays radioactive count and radiation level in mR/hr or mSv/hr. Time selection switch allows Counts Per Second (CPS) or Counts Per Minute (CPM) mode. CASE SIZE: The GCA-07 measures 7 ½" (length) x 4.1" (width) x 1 ¼" (height). 

Images Alpha Particle Spark Detector allows one to see the detection of alpha particles. It demonstrates the electronic detection of radioactive alpha particles. In addition by using a plain sheet of paper one can demonstrate the shielding of radioactive particles by an absorber. This alpha particle spark detector utilizes a 8000 volt negatively-charged electrode and thin diameter copper wires connected to ground that are strung through the air approximately 0.1" above the electrode. When an alpha particle passes in-between the wire and the electrode it ionizes the air between. The high voltage potential between the wires and the electrode causes an avalanche effect that we see as an electrical discharge between the wires and the electrode. This detector is only sensitive to alpha (α) particles, and will not detect beta(β), X-ray or gamma(γ) radiation.

Ionization chambers may be used to measure ionizing radiation by measuring the amount of charge generated from the interaction of radioactive particles with molecules of a certain gases. The simplest form of the chamber consists of a cylinder at ground and one charged positive center electrode. When radiation is introduced into the gas between these two electrodes it liberates electrons from the gas molecules creating gas ions, and thus allowing charge to flow from center electrode (wire) to outer electrode cylinder. The strength of the electrical field generated is directly porportional to how much radiation is present in the chamber and the amount of distance between the electrodes and the given volume of gas between them.

The New Digital Meter Adapter is now a universal expansion module. It is a combination of the original Digital Meter Adapter, RS 232 interface adapter & Random Number Generator Adapter. The new DMAD has all three functionalities in one module to enhance the capabilities of Geiger Counters.