The Quantek Model 901 is a battery-operated, portable headspace oxygen analyzer. Other headspace analyzers require a new sensor every 1-2 years. The Model 901 is equipped with a long life sensor, expected to last 5+ years. The Model 901 is trusted by small and large food packagers, producers, and quality control personnel throughout the world. Use it in the lab, or on the packaging line. Non-technical personnel will find it very easy to use – and at less than 3 pounds, it can be easily transported to other locations.