Maxtec, Inc. introduces the revolutionary MAX02R+ oxygen analyzer. It comes fully equipped with a simple to use one-touch calibration, and an unsurpassed 5000 hour battery-life. The large LCD has both calibration and low-battery replacement reminders. This new analyzer provides unbeatable stability with outstanding accuracy. Both analyzer and sensor are protected with a two-year warranty. Although our proven MaxR-250 oxygen sensor is guaranteed for two years, most customers find that they are able to use it considerably longer. The MAX02R+ ergonomic design is user friendly and comfortable in your hand.