The AOI Series 2000 is a microprocessor-controlled percent oxygen analyzer suitable for monitoring from 0-1% to 0-100% oxygen. It is available in single-range or optional three-range autoranging configurations, with all three-range analyzers featuring automatic range switching . The instrument includes built-in visual and audible alarms, and its front panel contains five switches for accessing the instrument's settings. It is equipped with three user-configurable oxygen alarm relays and one status alarm relay for fail-safe operation .

The Series 2000 features an extended-life oxygen sensor with an enhanced electrolyte system. For applications where carbon dioxide is present, the system retards passivation of the sensor anode, allowing the products of oxidation to dissolve in the electrolyte. This effectively renews the sensor continuously, resulting in increased sensor life even if exposed to 100% carbon dioxide. The enhanced mechanical design ensures longer life and virtually eliminates leakage of electrolyte .

The monitor is available in several mechanical configurations, including a watertight NEMA 4X (IP 66) enclosure. The gas inlet and outlet connections on the sensor housing are quick-connect types, with 1/4" stainless steel compression fittings available upon request at no additional charge. The monitor can also be configured with an optional remote sensor that may be placed up to 1,000 feet (300 meters) from the electronics. Key features include a 0.4in (10.2mm) high, 4-1/2-digit LCD, 4-20 mADC and 0-20 VDC outputs, and factory calibration. The electronics and sensor carry a 2-year warranty .