OMS™ Sample Draw Oxygen Monitoring System

Zirconium Oxide Sensor

At the heart of the OMS is a non-depleting zirconium oxide sensor that has a 10-year service life. The sensor does not require a reference gas for calibration and can operate in nitrogen environments of up to 100%. The sensor responds to low oxygen conditions within seconds, and readings are not affected by changes in temperature, humidity, or barometric pressure. Other systems using less sophisticated technology require periodic calibration and sensor replacement. They can also be susceptible to false triggering caused by temperature extremes or sudden changes in barometric pressure. The OMS’ non-depleting zirconium oxide sensor avoids these problems and is virtually maintenance and worry-free.

Air Draw Flow Pump

The OMS uses a flow pump that continuously samples air drawn from end points up to a maximum of 30 m (100 ft) from the unit. The draw tube is made of transparent polyurethane 7 mm (1/4 in) in diameter, and can be passed through RF shielded waveguides when required. For optimal sensing, the tube’s end point should be positioned near the ceiling of the space being monitored.

On-Board CPU

An on-board CPU provides the systems logic and control. A local back-lit display shows the oxygen concentration from the sample point as a percentage. This information can be transmitted to any distributive control system, or programmable logic controller. The OMS also has user selectable, dual alarm relays for activating remote audio alarms and strobe lights. The OMS can be operated remotely up to 1,000 m (0.6 miles) from centralized distributive control systems.