AQA 25-01 metals, nutrients and exchangeable bases in soil
March 2025
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Our customer service charter and service standards
Learn about the National Measurement Institute's customer service standards and our terms and conditions.
Pattern approval terms and conditions
Terms and conditions for pattern approval services at the National Measurement Institute.
Servicing licensee application form
Use this form to apply for or renew a servicing licence.
Showcasing National Measurement Institute scientists this National Science Week
Hear from our experts about why science matters and what they love about working in measurement science.
Winners of the 2022 Metrology Awards announced in National Science Week
Measurement innovation across a range of fields have been showcased at the National Measurement Institute’s (NMI) 2022 Metrology Awards.
New compliance plan to build confidence in trade measurement
The National Measurement Institute's latest compliance plan helps support confidence in trade measurement.
Forensic drugs
We produce NATA accredited reference materials to ISO 17034General requirements for the competence of reference materials producers.
National instrument test procedures
Test procedures, including national instrument test procedures (NITP), describe the step-by-step process for verifying measuring instruments and inspecting pre-packaged products.