Nuvair hand-held AN300 Portable Nitrogen Analyzer is designed for use in the measurement of nitrogen. Constructed of high impact resistant materials, the AN300 provides unparalleled performance under the harshest conditions. The unit is powered by 3 AA batteries which should last for at least 2000 hours of use. The Sensor is for the AN300 incorporates a N-33 Micro-fuel Cell sensor for quick and accurate analysis of nitrogen. This maintenance free, sealed, electrochemical cell is specific to nitrogen, insensitive to flow rate, and has a 90% response in less than 10 seconds. At the end of its life, the cell is discarded and replaced.