Oxygen Combustion Control Oxygen Analyzers Oxygen Combustion Control Analyzer - Michell XZR500 Measurement range: 0.01 to 25% O2 Various probe for stack temperatures up to 1,400°C No air reference required with our Metallic Sealed Reference Sensor Cost-Effective Oxygen Transmitter - OXY-FLEX Series Suitable for both purity and percent oxygen measurement 0.1% to 25% or 0.1% to 100% oxygen transmitter Measures in temperatures up to 400degC/750degF 4-20mA/0-10VDC and digital outputs selectable