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DETECTOR
- 38mm x 38mm x 51mm, (1.5" x 1.5" x 2"), 0.07L (4.5 cu. ins.) Sodium-Iodide detector for high sensitivity and high energy resolution.
SPECTROMETER
- The system utilises a 256 channel gamma ray spectrometer permitting high resolution
analysis of the spectra. The system may be set in the 0-1.5 MeV mode to more accurately
identify nuclides in the lower portion of the spectrum,
or to the full 0-3.0 MeV range, permitting analysis of all nuclides in the spectrum.
SPECTRUM STABILISATION
- Automatic gain stabilisation is used to eliminate drift. The unit displays system performance parameters including gain and detector resolution.
SPECTRUM DISPLAY
- In this mode, the accumulated spectrum is displayed and the user can use the 4-way switch to move a cursor up and down the spectrum to inspect
special peaks. The display also gives the current channel number and count rate. This feature is used for detailed analysis of the spectrum.
PEAK ANALYSIS
- All the peaks that can be identified are listed, showing their energy and intensity.
NUCLIDE IDENTIFICATION (for model GR-130 only)
- The system has an in-built library of nuclides. Peaks are automatically identified and individual nuclides determined, then displayed for easy interpretation.
EXPOSURE RATE
- The exposure rate given by all instruments except an Ion chamber,
which is a low sensitivity instrument, is always an approximation, as the
true exposure rate is nuclide specific. High-sensitivity instruments using
Sodium-Iodide detectors normally are calibrated only for a specific isotope
(typically Cesium) and are therefore inaccurate at measuring non-Cesium sources.
Since the GR-130 can identify the emitted energy, an accurate computation of
exposure rate can be made. The user can select the display of exposure rate in appropriate units -
selections are µR/h, µSv/h or µGy/h. Measuring range 0.5µR/h - 10mR/h.
SURVEY MODE
- In this mode, the GR-130 operates as a gamma ray scintillometer indicating counts/second
and with adjustable integration time, audible alarm and chart recorder display. In this mode, the
system may be used as a searching tool, to locate sources of radiation. The audio tone varies with radiation levels to
permit easy "eyes-free" scanning. Alternatively, the audible alarm may be set to a predetermined level.
CONTROLS
- A special moulded handle has an integrated 4-way switch (joy stick) permitting user friendly, "one-button", menu driven operation.
DATA STORAGE
- The GR-130 can store up to 16,000 single exposure rate or survey readings or 122 full 256-channel spectra. Data storage is backed up
with an internal Lithium battery protecting the data against battery failure. All data is Time/Date tagged for identification.
DATA OUTPUT
- The data stored in memory may be retrieved via an RS-232 data output at 9600 baud. Special software is available to display
trends in Survey or Dose data. Full spectral data may also be down-loaded to a computer.
BASE STATION
- In this mode the system can be set to cycle at a regular rate (1min - 1 hr) and store data in memory. This mode is intended for
long term local site monitoring. Full spectrum data can be saved to memory or downloaded directly to PC.
REMOTE
- All functions of the GR-130 can be controlled remotely from an external computer or modem.
MECHANICAL
- This instrument is well balanced and housed in a rugged aluminium case with full weather-proofing, including short term water immersion.
Operating temperature range is -10°C to 50°C. Size is 170mm x 235mm x 110mm (6.75" x 9.25" x 4.5"). Weight is 2.4kg (5.2 lbs)
including internal battery.
BATTERY
- The GR-130 is powered by 2 x "D" cell alkaline or rechargeable batteries permitting typically 25 and 15 hours of operation respectively at 25°C.
The supplied battery charger permits re-charging overnight without removing the batteries.
FUNCTIONS
- Measurement mode setting (survey, analyse, calibrate, stabilise, dose rate). Internal parameter setting (dose rate units, alarm threshold, energy
range, time of measurement, data output, integration time). Spectrum display (moving cursor, vertical range). Start, Stop and Menu switching.
CONNECTORS
- In back panel RS-232 serial port, external charger.
CONTROLS
- A special moulded handle has an integrated 4-way switch (joy stick) permitting user friendly, "one-button", menu driven operation.
POWER
- The GR-130 is powered by 2 x "D" cell alkaline or rechargeable batteries permitting typically 25 and 15 hours of operation respectively at 25°C.
The supplied battery charger permits re-charging overnight without removing the batteries.
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 GR-130G Hand-held Spectrometer
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The GR-130G is a hand-held unit with 256 channel recording of 16,000 single readings or 120 full, 256 channel spectra.
It has 3 modes:
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Survey Mode - operates as a scintillometer
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Dose Meter Mode - measure the exposure rates
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Assay Mode - for spectrum analysis to provide %K, ppm eU, and ppm eTh.
OR
Nuclide Analysis Mode (optional) - to identify specific nuclide.
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FEATURES
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Very easy to use complete, hand-held spectrometer, with simple menus.
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Light-weight - just 2.4 kg with 2 x "D" cell batteries.
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Precise readings using inbuilt gain stabilisation to eliminate drift.
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Onboard memory for 16,000 readings or 120 spectra.
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In seconds identifies radioactive nuclide or provides assay spectrum analysis.
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Full graphic spectra or digital information on backlit LCD.
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On startup measures background radiation and sets audible tone threshhold.
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Operates in rugged field temperatures : -10°C to 50°C.
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APPLICATIONS
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Mineral Exploration
- Geophysical assay analysis by geologists in the field
- Provides %K, ppm eU, and ppm eTh
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Steel Industry
- Scans vehicles
- Spectral analysis of outgoing dust loads
- Analysis of offshore suppliers products
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Health Care Industrys
- Quick survey of rooms used by radio-therapy patients
- Measuring radiation levels after patient tracer ingestion
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General Industry
- Verifying stated source isotype
- Local site surveys
- Radioactive contamination levels
- Teaching tool for students
- Real time dosimeter
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