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Fig. 1. Schematic diagram of ammonia measurement system. Arrows indicate direction of air flow. A, Single phase fan (2102/450 Woods air movement); B, aluminium honeycomb anti-swirl device (Airflow Developments Ltd., High Wycombe, Bucks.); C, 6-armed sampler; D, adsorption flask; E, water trap; F, Flow meter (Type GSD, G.A. Platon Ltd., Basingstoke, Hants); G diaphragm pumps (Type B100 SE, Charles Austen Pumps Ltd., Byfleet, Surrey); H, Remus 4G 1.6 gas meter (Schlumberger Gas systems, Basingstoke, Hants).
