The Model 327R percent oxygen analyzer is a high accuracy, fast response unit offering simple calibration, no required support gases, and four standard analysis ranges.

The unit consists of two components; the explosion proof, field mounted analysis section which includes the oxygen sensor and sample handling system; and a separate general purpose control unit which includes the meter readout, signal output, optional alarms, range switch, and other controls.

The 327RA has a panel mounted countrol unit whereas the 327RB uses a control unit designed for bulkhead mounting.