The Model O2L is a general purpose oxygen analyzer for research, fuel and combustion system monitoring, food processing and packaging, pharmaceutical manufacturing, automotive engine analysis, and purge verification applications. The Model O2L is designed to measure oxygen in a range of 0-100% levels with resolution of 0.01 % from 0-10% and 0.1% from 10-100%. The unit operates in LN (low noise) mode for smooth readings and the measurements are made independent of sample pressure, gas temperature and other gases including CO2 and H2O. Gases other than oxygen will, in most cases not affect the measurement except for their dilution effect on the gas mixture. The Model O2L features an easy to use and feature bright LED displays, touch panel controls, easy calibration, and has a sampling pump and internal flow meter for monitoring flow in the system. A terminal strip on the rear panel is included for analog relay alarm outputs , 4-20 mA outputs, and an analog 0-1.0 VDC output is on a BNC connector. A DB-9 connector RS-232 digital output provides digital serial communications and is compatible with Oxisoft software. The unit has CPC O-ring quick connect inlet fittings for industrial applications.