Radiation Counter (Gm Counter)

Item Code: SN615

Principle and Working:

Radiation Measurement System is built around the Radiation Counter and GM tube along with different types of radioactive sources and absorbers to study the characteristics of radiation, background radiation, Gm’s operation and the interaction of radiation with matter. The radiation counter includes the features of a preset time function, a digital rate-meter with audible beeper and alarm and digitally controlled high voltage supply and computer interfacing via USB cable. ...
Operation may be as a stand-alone station or directly from the computer when used. Data files are saved in spreadsheet compatible format for importing in most common spreadsheets allowing the student to perform calculations and graph the results for printing.
The Radiation Counter is equipped with upgraded high voltage and an internal pre-amplier allowing operation with optional scintillation detectors for gross gamma counting.




  • ST360 can operate as a standalone unit or using a computer (PC or Mac) via USB or serial connection.
  • STX Software can display data in analog or digital format.
  • STX Softawre All data is stored in a format that can easily be transferred directly to many common spreadsheet programs.
  • Experiment Lab Manuals provided in CD.
  • For manual operation 6 navigation keys and status LED are their on top of ST360

  • Plotting a Geiger Plateau characteristics curve.
  • To calculate the Statistics of Counting.
  • To study the Background radiation.
  • To measure the Resolving Time (RSS2 is required).
  • To verify the Inverse Square Law.
  • To calculate the Range of Alpha Particles.
  • To study the Absorption of Beta Particles.
  • To calculate the Beta Decay Energy.
  • To calculate the Absorption of Gamma Rays.
  • To calculate the Geiger Tube Efficiency.
  • To calculate the Shelf Ratios.
  • To study the Backscattering.

  • GM Counter : Input BNC connector, MHV connector High voltage 0 to +1200 volts, selectable in 20 volt increments, Display 6 decade LED, 1 inch numerals, Modes Counts, Elapsed Time, Preset Time, Count Rate (cpm or cps), High Voltage Level, Interface USB 2.0, RS-232 serial ports for PC and Mac, Power AC adapter, 9 Volt DC at 500 mA, Dimensions 10 in. W x 7 in. D x 4.5 in. H Software STX software for PC and Mac.
  • GM Detector : 35 mm end window GM tube, BNC connector, Cathode Wall 446 Stainless Steel, Thickness 1.52 mm, OD. 31.75 mm, Length 62.8 mm, Neon & Halogen Gas Filled, Mica window 1.8 – 2.2 mg/cm2, Window Diameter 1.21 in. (30.7 mm), Max Temperature +50°C, Maximum Altitude 8,000 ft, Background <50 cpm (V = 900), Dead time 100 μsec (V = 900)
  • Sources (Order Separately) : Sealed disk (1″ dia), Co-60 1 μCi (37 kBq), Cs-137 5 μCi (185 kBq), Tl-204 1 μCi (37 kBq), Sr-90 0.1 μCi (3.7 kBq), Po-210 0.1 μCi (3.7 kBq)
  • 1 Radiation counter with operating software.
  • 1 GM Tube with stand and Cable
  • 1 Radiation absorber set – 20 pieces
  • 1 Lead shield for radioactive source
  • 1 USB cable (6 ft.)
  • 1 Experiment Lab Manuals with Sample data (CD version)
  • 1 Set of 5 radioactive source (Order Separately)
  • 1 Set of half disk sources (Order Separately)
  • 1 Cs-137/Ba-137m Isotope Generator Kit (Order Separately)
  • 1 Polonium 210 disk sources (Order Separately)