Metrology for Ammonia in
Ambient Air

Welcome to the MetNH3 webpage

MetNH3 stands for metrology for ammonia in ambient air and is Joint Research Project (JRP) ENV55 running for three years starting 1st of June 2014 under the European Metrology Research Project (EMRP).

Experts of 8 European metrology institutes and of one Resercher Excellence Grant are collaborating on research related to measurements of ammonia.

The JRP aims at developing metrological traceability for the measurement of ammonia in air from the level of primary gas mixture and instrumental standards to the field level.


The research leading to these results has received funding from the European Union on the basis of Decision No 912/2009/EC. Last update: 10/03/2016