• Precise control of low oxygen (O2) setpoints with high accuracy using a zirconium oxide sensor.
• Includes an integral flow sensor for verifying sample system integrity.
• Rack-mounted design suitable for standalone or Continuous Emission Monitoring Systems (CEMS) integration.
• Features predictive diagnostics and proactive alarms.
• Supports digital communications via TCP/IP Ethernet Interface.

• Process heaters
• Steam boilers
• Thermal oxidizers

• Refining and petrochemical industries
• Power and steam generation
• Various industrial processes

The WDG-VRM is a rack-mounted oxygen analyzer that can function independently or as part of a CEMS. It is designed for optimized combustion control and safety, measuring excess O2 to ensure efficient burner management. The analyzer uses zirconium oxide sensor technology for precise control of low O2 setpoints.

The device includes measurement redundancy and continuous diagnostics to ensure analyzer health and accurate O2 measurements. It offers remote communication for diagnostics and error notifications via Modbus RTU or Fast Ethernet.

Remote performance monitoring is possible through an Ethernet connection, facilitating maintenance and asset management.

• Principle of operation: Zirconium oxide for net oxygen measurement.
• Output range: Oxygen from 0-1% to 0-100%.
• Accuracy: ±0.75% of measured value or ±0.05%, whichever is greater.
• Response time: Less than 5 seconds at 2 scfh from 2% O2 to 20% O2.
• Analog output: 3 isolated linear current outputs for O2, fully scalable.
• Alarms: 5 independent, NO alarms with configurable relays.
• Display: 4.2” color VGA with graphical user interface.
• Digital outputs: Modbus RTU, TCP/IP Ethernet, USB port.
• Diagnostics: Includes low sample flow, cell resistance, and calibration tracking.
• Calibration: Supports automatic calibration with optional remote unit.
• Environmental conditions: Operates in -25 to 50°C, 10 to 90% relative humidity.
• Enclosure: 19” rack mount, 4U.
• Power requirements: 115/230 VAC, 47 to 63 Hz, 740 VA max.
• Calibration gas requirements: Use gases at 10 psig, with specific O2 span and zero gases.
• Sample gas requirements: Flow rate of 2-20 scfh, non-corrosive, non-condensing, oil-free, and less than 3 micron particulates.