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Products and services

Radioactivity services

Providing confidence in radioactivity measurements

The Nuclear Metrology Group offers a broad range of products and services that underpin the environmental monitoring, nuclear decommissioning and medical radiation industries, providing absolute confidence in radioactivity measurements.

Our services include the supply of standardised radionuclides for the calibration of customer measurement equipment, calibration of customer-supplied samples, calibration of measurement instruments and Proficiency Test Exercises, ensuring industry-wide consistency and accuracy.

Many of our calibration products and measurement services are accredited by UKAS under the ISO 17025 standard. The accredited capability of those services can be found in the calibration and testing schedules issued by UKAS.


Supporting nuclear decommissioning and environmental monitoring

We provide traceability to international standards of radioactivity measurements and classification of radioactive waste, helping our customers overcome regulatory barriers, and ensuring the safety of the general public.

We can supply a range of over 20 different radionuclides for calibration of various detector systems, such as liquid scintillation counters and sodium iodide gamma-detectors. Our range of radionuclides include solid, liquid and gas forms.

Find out about our research for the environment and decommissioning sectors


Supporting nuclear medicine

We provide radiopharmaceutical and nuclear medicine customers with high purity, standardised activity radioisotopes and calibration of customer-supplied samples traceable to NPL primary standards.

Our UKAS-accredited services increases the safety of radiopharmaceuticals and nuclear medicine administered to patients, improves drug development and ensures regulatory requirements are met.

We offer a range of services including the supply of calibration sources or testing of the secondary standard radionuclide calibrator known as the Fidelis to support nuclear medicine departments in hospitals, as well as providing support for clinical trials of new medical isotopes.

Find out more about NPL's Nuclear medicine research

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Standardised radionuclide products

Standard radionuclide solutions

We disseminate these standards to users of ionising radiation in fields such as nuclear medicine, environmental radioactivity monitoring and nuclear decommissioning. 

Custom Radionuclides

The nuclear metrology group can also supply custom made standards for a wide range of radionuclides and activity concentrations. 

Radioactive Gas Standards

We provide services giving traceability to measurements of radioactive gases within the nuclear industry and for environmental monitoring.

Radioactive Air Filters

Radioactive air filters are used to calibrate detector systems used by air monitoring stations and laboratories.

Solid Reference Material

NPL’s solid reference materials contain radionuclides at or near the working level for use by laboratories making measurements of radioactivity relevant to environmental monitoring, decommissioning and NORM.

Proficiency test exercises

Environmental PTE

The Environmental PTE is accredited to ISO 17043, and ensures that the performance of spectroscopic techniques and radiochemical separation procedures adopted by participating laboratories are regularly assessed.

Medical PTE

PTE exercises between hospital or research sites can be used for establishing equivalence (as part of a clinical trial for example) or as an auditing tool to demonstrate competence and traceability.

Nuclear Industry PTE

NPL prepare a 200 litre drum of ‘simulated’ waste containing inactive low-density material with vials of resin, in initially undisclosed locations spiked with gamma-emitting radionuclides of known activity.

Solid Reference Material PTE

NPL’s solid reference materials contain radionuclides at or near the working level for use by laboratories making measurements of radioactivity relevant to environmental monitoring and decommissioning.

Tritium PTE

NPL provides a performance test for dosimetry services where measurement of tritium-in-urine is part of an internal dose assessment procedure on behalf of Public Health England.

Calibration services

Pre-clinical dosimetry consultancy

We provide world-class research, calibrations, specialised measurement services and training for the dosimetry of ionising radiation in cancer therapy, diagnostic X-rays and protection of radiation workers for hospitals worldwide.

Fidelis secondary standard radionuclide calibrator

The Fidelis was conceived to allow hospitals and manufacturers rapid access to traceable measurements for a wide range of medical and industrial radionuclides.

Wide area reference source calibration

Standards for the calibration of surface contamination monitors.

Certification of medical radionuclides

NPL provides a calibration service to ensure radioactivity measurements are traceable to national standards

We’re here to help

Still struggling to work out what you need? We pride ourselves on giving sound technical advice to guide you. By combining expert advice, standard tests and bespoke consultancy, you can be confident in our approach.

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Safely decommissioning nuclear sites



Supporting the theragnostic revolution: personalised diagnostics and therapeutics



Find out more about our expertise in this area, and how we are creating impact from science and engineering.

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Our research and measurement solutions support innovation and product development. We work with companies to deliver business advantage and commercial success.
Contact our Customer Services team on +44 20 8943 7070