Calibration of
Radiation Instruments

IRR99 Regulation 19 requires radiation instruments to be properly maintained and tested at appropriate intervals by a 'qualified person'. The approved Code of Practice suggests a test, or calibration, at least every 12 months.

Radman Associates is qualified to test both radiation survey meters and contamination monitors, providing all the necessary calibration certificates.

To check the performance and calibration of your radiation instruments against specific isotopes and energies, please send them to our calibration department at the address below or call 0845 226 7248 to arrange collection.

Radiation Survey Meters

Radiation survey instruments are calibrated in our laboratory against a traceable sealed source standard of caesium-137 (gamma rays 662 keV).

Calibration fee: £80 (including return P&P)

Contamination Monitors

Geiger-Müller probes used for measuring beta contamination on laboratory surfaces are calibrated against wide area reference standards Carbon-14 (ß 0.16 MeV) and Chlorine-36 (ß 0.71 MeV).

Derived responses are given for a surface contamination level of 1 Bq/cm². Estimated values are provided for the more common inventory of laboratory radioisotopes including Phosphorus-32 (ß 1.71 MeV), Phosphorus-33 (ß 0.25 MeV) and Sulphur-35 (ß 0.16 MeV).

Calibration fee: £65 (including return P&P)

On-site calibration?

If you have a quantity of contamination instruments it may be more cost-efficient for us to calibrate them on your premises. This will also minimise downtime while instruments are off-site.

To discuss on-site instrument calibration please contact Jill Wilkinson or call 0845 226 7248.

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Radiation protection advice

RPA Service Contracts
Radiological Assessment
   (For RSA93 compliance)
Critical Examination
   (For IRR99 compliance)
Contamination Survey
   (Land and Buildings)
Lab Clearance Survey

Fast response

Radman Associates aims to return all radiation instruments within 72 hours

Good Practice

All Radman calibrations are carried out in compliance with NPL Good Practice Guide no. 14 - The Examination, Testing & Calibration of Portable Radiation Protection Instruments