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 two Resercher Excellence Grant holders 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.