Siemens Oxygen Sensor QGO20 Series
Product Description
Siemens QGO20 Oxygen Sensors for Flue Gas Monitoring
Siemens QGO20 Series oxygen sensors provide residual oxygen (O2) measurement in exhaust gases produced by industrial combustion processes. They are intended for boiler installations and heat generation plants operating with natural gas or light fuel oil.
Equipped with a zirconium dioxide (ZrO2) sensing cell, the QGO20 detects oxygen concentration in flue gases and delivers measurement signals to the connected combustion control equipment, supporting accurate oxygen monitoring.
Combined with Siemens LMV52 and PLL52 control systems, the sensor enables O2 trim functionality. This helps regulate the combustion air-to-fuel ratio, improve energy efficiency, and reduce unnecessary excess oxygen in the exhaust stream.
Key Features
- Residual oxygen measurement in combustion flue gases
- Zirconium dioxide (ZrO2) oxygen sensing technology
- Oxygen measurement span: 0.2–20.9% O2
- Designed for natural gas and light fuel oil combustion installations
- Maximum flue gas temperature at the measurement location: 300 °C
- Integration with Siemens LMV52 and PLL52 control systems
- Supports O2 trim for more efficient combustion management
- Stainless steel sensing tube
- Die-cast aluminum connection head
Typical Applications
- Combustion monitoring and control for industrial boilers
- Industrial heat production facilities
- Natural gas-fired burner installations
- Light fuel oil burner equipment
- Oxygen concentration measurement in flue gases
- Combustion systems equipped with O2 trim control
Product Variants
- QGO20.000D17: AC 120 V
- QGO20.000D27: AC 230 V
Important: Installation and integration must follow Siemens specifications. The QGO20.000D17 version is specified exclusively for use with LMV52 and PLL52 systems.
Specifications
Siemens QGO20 Oxygen Sensors – Technical Data and Specifications
| Technical Attribute | Product Specification |
|---|---|
| Manufacturer | Siemens |
| Product Series | QGO20 |
| Available Variants | QGO20.000D17 / QGO20.000D27 |
| Device Classification | Oxygen Sensor |
| Primary Measurement Function | Monitoring Residual Oxygen Concentration in Combustion Flue Gases |
| Oxygen Detection Technology | Zirconium Dioxide Measuring Cell |
| Oxygen Measurement Span | 0.2–20.9% O2 |
| D17 Power Supply | AC 120 V ±15% |
| D27 Power Supply | AC 230 V ±15% |
| Supply Frequency | 50–60 Hz ±6% |
| Electrical Power Demand | Maximum 90 W / Typical 35 W |
| Sensing Cell Working Temperature | 700 °C ±50 °C |
| Permitted Flue Gas Temperature at Measurement Location | Maximum 300 °C |
| Maximum Flange Temperature | 250 °C |
| Maximum Connection Head Temperature | 70 °C |
| Permissible Flue Gas Velocity | 1–10 m/s (with AGO20) |
| Compatible Combustion Fuels | Natural Gas (H), Light Fuel Oil (EL) |
| Signal Transmission Cable Length | Maximum 100 m / Recommended: Under 10 m |
| Signal Cable Configuration | Shielded 6-core Cable |
| Enclosure Protection Classification | IP40 (must be achieved through proper mounting) |
| Approximate Device Weight | 0.9 kg |
| Measuring Tube Construction | Stainless Steel X5CrNi 18 9 |
| Connection Head Construction | Die-cast Aluminum |
| Permitted Storage Temperature | -20 to +60 °C |
| Storage Humidity Limit | Below 95% RH |
| Maximum Installation Elevation | 2,000 m above sea level |
| Supported Combustion Control Equipment | Siemens LMV52 / PLL52 |
| Associated Accessories | AGO20 Flue Gas Collector, PLL52, AZL52 |
QGO20 Model Variants and Electrical Supply Requirements
| Sensor Model | Rated Supply Voltage | Siemens Article Number |
|---|---|---|
| QGO20.000D17 | AC 120 V | BPZ:QGO20.000D17 |
| QGO20.000D27 | AC 230 V | BPZ:QGO20.000D27 |
Installation Note: Siemens QGO20 oxygen sensors require integration with an approved compatible control system and the specified accessories. Oxygen measurement must be performed using the AGO20 flue gas collector in accordance with Siemens installation guidelines.
Product Specifications
Siemens QGO20 Oxygen Sensors – Technical Data and Specifications
| Technical Attribute | Product Specification |
|---|---|
| Manufacturer | Siemens |
| Product Series | QGO20 |
| Available Variants | QGO20.000D17 / QGO20.000D27 |
| Device Classification | Oxygen Sensor |
| Primary Measurement Function | Monitoring Residual Oxygen Concentration in Combustion Flue Gases |
| Oxygen Detection Technology | Zirconium Dioxide Measuring Cell |
| Oxygen Measurement Span | 0.2–20.9% O2 |
| D17 Power Supply | AC 120 V ±15% |
| D27 Power Supply | AC 230 V ±15% |
| Supply Frequency | 50–60 Hz ±6% |
| Electrical Power Demand | Maximum 90 W / Typical 35 W |
| Sensing Cell Working Temperature | 700 °C ±50 °C |
| Permitted Flue Gas Temperature at Measurement Location | Maximum 300 °C |
| Maximum Flange Temperature | 250 °C |
| Maximum Connection Head Temperature | 70 °C |
| Permissible Flue Gas Velocity | 1–10 m/s (with AGO20) |
| Compatible Combustion Fuels | Natural Gas (H), Light Fuel Oil (EL) |
| Signal Transmission Cable Length | Maximum 100 m / Recommended: Under 10 m |
| Signal Cable Configuration | Shielded 6-core Cable |
| Enclosure Protection Classification | IP40 (must be achieved through proper mounting) |
| Approximate Device Weight | 0.9 kg |
| Measuring Tube Construction | Stainless Steel X5CrNi 18 9 |
| Connection Head Construction | Die-cast Aluminum |
| Permitted Storage Temperature | -20 to +60 °C |
| Storage Humidity Limit | Below 95% RH |
| Maximum Installation Elevation | 2,000 m above sea level |
| Supported Combustion Control Equipment | Siemens LMV52 / PLL52 |
| Associated Accessories | AGO20 Flue Gas Collector, PLL52, AZL52 |
QGO20 Model Variants and Electrical Supply Requirements
| Sensor Model | Rated Supply Voltage | Siemens Article Number |
|---|---|---|
| QGO20.000D17 | AC 120 V | BPZ:QGO20.000D17 |
| QGO20.000D27 | AC 230 V | BPZ:QGO20.000D27 |
Installation Note: Siemens QGO20 oxygen sensors require integration with an approved compatible control system and the specified accessories. Oxygen measurement must be performed using the AGO20 flue gas collector in accordance with Siemens installation guidelines.
Company Information
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