Calibration Services

GEX Dosimeter Batch Calibration Services
GEX Dosimeter Batch Calibration Services - GEX Dosimeters, Dosimetry Systems, and Radiation Indicators.
GEX provides formalized, complete turnkey dosimeter batch calibration services for a wide range of applications. GEX calibration services conform to current recommended calibration methods published in industry standards, guides and practices.

GEX Dosimeter Batch Calibration Service includes:

  1. Standardized protocols with formal procedures
  2. Dose traceability to national standards
  3. Standard calibration phantom holders
  4. In-stock reference transfer standard alanine dosimeters
  5. Validated software designed specifically for calibration applications
  6. Calibration specialty products
  7. Calibration specific automated dosimetry software
  8. Expert consulting
Calibration Service and Audit Package (S1101/S1102) -
Product Information Sheet PDF

What is dosimetry system batch calibration, and why is this necessary?

Dosimetry batch calibration is the process where the response of a dosimetry system is characterized through comparison with a traceable reference (standard). The calibration method for the dosimetry system is designed to ensure the integrity of the measurements made with the user’s dosimetry system.

Dosimetry systems must be calibrated for each batch of dosimeters. In addition, a separate calibration is required for each measurement instrument.

All dosimetry systems must be calibrated traceable to a national or international standard. Dosimeter manufacturers may provide response functions on their websites or in product literature, but these are for general information only. Therefore, the end-user must calibrate the measurement system as a whole (the dosimetry system) and ensure that the calibration is suitable for the conditions of use.

Routine dosimetry systems should be calibrated in accordance with the requirements of ISO/ASTM 51261. Reference dosimetry systems should be calibrated in a manner to meet the requirements of ISO 17025.

ISO/ASTM Methods

GEX uses formalized calibration procedures to assure highly reproducible results from calibration to calibration. We perform dozens of calibrations and fit hundreds of calibration curves each year. Our full turnkey calibration service package allows a user to follow either of the two ISO/ASTM 51261 currently recommended calibration methods.

  1. Laboratory calibration performed at a certified high dose calibration laboratory with in-situ (in-plant) calibration verification.
  2. Full in-plant calibration using reference transfer standard dosimeters.
Select Your National Standards Laboratory

Users can select the source of calibration traceability from the following calibration laboratories:

  1. GEX Laboratory - detailed information
  2. NPL - National Physical Laboratory - England
  3. NIST - National Institutes of Science and Technology - Washington DC
  4. MDS Nordion - Canada
  5. Risø National Laboratory - Denmark
List of Calibration Services
Number Service     Includes
S1000

Alanine Pellet Transfer Dosimeters for In-Plant Calibration

  • Alanine pellet issued from Risø High Dose Reference Laboratory
  • Post-irradiation pellets returned to Risø for traceable dose measurements  
S1000L

Alanine Film Transfer Dosimeters of for In-Plant Calibration (for low energy applications)

  • Alanine films issued from Risø High Dose Reference Laboratory
  • Post-irradiation films returned to Risø for traceable dose measurements  
S1001

Calibration Laboratory Gamma Dose Point

  • Arrange with customer’s choice of Nat Standards Lab for completion of required dose points and/or dose range
  • Dosimeter samples either sent to Laboratory from customer stock, or from GEX samples
  • Certificate of Irradiation issued by Laboratory
  • Dosimeters heat treated (if applicable), and returned to customer for measurement
S1002

10MeV Electron Beam Calibration Dose Point

  • Arrange with customer’s choice of Nat Standards Lab for completion of required dose points and/or dose range
  • Dosimeter samples either sent to Laboratory from customer stock, or from GEX samples
  • Certificate of Irradiation issued by Laboratory
  • Dosimeters heat treated (if applicable), and returned to customer for measurement
S1101

GEX Calibration Service Package

  • Calibration planning with development of a formal calibration-specific protocol and record worksheets
  • Calibration curve fitting – 5 fits of calibration data: linear, log linear, quadratic, cubic or quartic – with “best fit” analysis
  • Calibration laboratory traceability report
  • Completed calibration data worksheets
  • GEX Calibration report summary
  • Dose estimation “Look Up Table”
  • Automated dosimetry software batch specific update (WINdose for Excel), if applicable.
  • Product information Sheet> Download PDF
S1102

Dosimeter Batch Calibration Audit Service Package

  • Audit planning with development of a formal calibration-specific protocol and record worksheets
  • Calibration laboratory traceability report
  • Completed audit data worksheets
  • GEX audit report summary
  • Analysis of audit data vs. current customer calibration
  • Product information Sheet> Download PDF