Flow Measurement of Diluted Ammonium Nitrate Ammonium Nitrate (NH 4 NO 3 ) is used as a nitrogen supplying fertilizer in the agricultural industry. It is solid under ambient conditions. Upon dilution with water, it dissociates in positive ammonia ions and negative nitrate ions that can directly be absorbed by plants. During the production process, the flow of the soluted ammonium nitrate has to be measured at around 190°C. Due to the failure of previously used magnetic inductive flow meters with ceramic liners, which have not been able to cope with the thermal stress, a plant operator of a fertilizer plant in the Netherlands called upon FLEXIM for several test measurements with a portable FLUXUS ultrasonic flow meter. By simply attaching the high temperature transducers on the outside pipe

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