The AOI OXY-SEN is a percent oxygen monitoring system designed for versatile installation. It can be used as a bench-top device, or it can be wall or panel mounted. The monitor's enclosure is designed for flush mounting onto a vertical surface such as an instrument panel, glove box, or hypoxic chamber . The system is equipped with a standard measuring range of 0-100% .

A key advantage of the OXY-SEN is its threaded sensor design. The diffusion end of the sensor has a threaded stock (M16 x 1) that provides easy and convenient installation through a bulkhead . This eliminates the need to use sample pumps or air-driven aspirators to provide sample to the sensor. The sensor is equipped with an "O" ring that helps to form a gas-tight seal . The monitor includes 10 feet (3 meters) of coiled interconnecting sensor cable and a plug-in jack to the electronics.

The general-purpose enclosure is fabricated from steel and painted with a baked-on finish. Key specifications include ±1% of full scale accuracy (at standard conditions), a 90% of full scale response time of under 30 seconds, and an operating temperature range of 40 to 104°F (5 to 40°C). The instrument features a 3-1/2-digit LCD and is CE approved .