Detail
VIRA Flue Gas Temperature Sensor provides reliable temperature measurement in combustion and exhaust-gas applications where continuous monitoring is essential for boiler efficiency, process control and equipment protection. Typical applications include steam boilers, hot-water boilers, flue gas ducts, chimneys, economizers, burners and industrial exhaust systems.
The sensor uses an RTD resistance temperature-measurement principle and can be configured with a suitable sensing element, protective sheath, process connection and insertion length for the installation conditions. Protective-sheath material should be selected according to flue gas temperature, pressure, corrosion risk, condensate conditions and mechanical requirements.
Correct installation helps obtain representative flue gas temperature data for operating control and maintenance planning. VIRA Flue Gas Temperature Sensors can be used with compatible temperature transmitters for integration with PLC, BMS, SCADA and industrial automation systems.
- Steam Boilers: Monitoring flue gas temperature to support boiler operation, combustion control and energy-efficiency monitoring.
- Hot Water Boilers: Measuring exhaust-gas temperature in commercial and industrial hot-water boiler installations.
- Economizers: Monitoring flue gas temperature before and after economizers to support heat-recovery performance evaluation.
- Flue Gas Ducts and Chimneys: Measuring gas temperature in boiler flue ducts, stack connections and chimney systems.
- Burner Systems: Supporting burner monitoring by measuring combustion-gas and exhaust-gas temperatures.
- Heat-Recovery Systems: Monitoring exhaust-gas temperature in heat-recovery units and related energy-efficiency applications.
- Industrial Furnaces and Ovens: Temperature monitoring in suitable combustion, exhaust and process-gas applications.
- Industrial Exhaust Systems: Monitoring compatible exhaust-gas temperatures in production facilities and process plants.
- Supports Boiler Efficiency Monitoring: Flue gas temperature data helps operators monitor boiler and combustion-system operating conditions.
- Helps Protect Equipment: Continuous temperature monitoring supports the protection of economizers, chimneys, ductwork, fans and other exhaust-system equipment.
- Improves Process Visibility: Provides reliable temperature feedback for steam boilers, hot-water boilers, burners and industrial exhaust applications.
- Suitable for Demanding Conditions: The sensing element, protective sheath and process connection can be selected according to temperature, corrosion and installation requirements.
- Supports Energy Management: Measured flue gas temperature can help identify operating deviations and heat-recovery opportunities.
- Flexible Installation Options: Threaded or flanged connections and selectable insertion lengths support installation in ducts, stacks and process equipment.
- Automation-System Integration: Compatible with temperature transmitters for PLC, BMS, SCADA and industrial control-system integration.
Flue Gas Temperature Sensor – Technical Features
| Measuring Principle | RTD resistance temperature measurement |
| Measured Media | Flue gas, combustion gas, exhaust gas and compatible process gases |
| Sensor Elements | Pt100, Pt1000, nickel and other resistance-element options, depending on selected configuration |
| Element Class | Class A or Class B, depending on selected configuration |
| Element Quantity | Single-element or duplex-element options |
| Protective Sheath Materials | Stainless steel 304, 316, 316Ti, 321, Inconel 600 and other materials according to process conditions |
| Protective Sheath Construction | Tube-type or solid-material sheath designs; suitable end construction selected according to the application |
| Process Connection | Threaded or flanged connection options |
| Immersion Length | Selectable according to duct diameter, gas-flow conditions and installation point |
| Connection Arrangement | 2-wire, 3-wire or 4-wire connection arrangements |
| Sensor Head | Standard B type and alternative connection-head options |
| Signal Integration | Resistance output; compatible head-mounted temperature transmitter options are available |
Flue Gas Temperature Sensor – Connection & Installation
- Installation Location: Select a representative flue gas measurement point, away from locations where wall temperature, air ingress or stratified gas flow may affect the reading.
- Immersion Length: The sensing section must extend sufficiently into the flue gas stream. Select the insertion length according to duct size, gas velocity and installation position.
- Mounting Direction: In flowing gas applications, the sensor should be mounted in a position that provides adequate contact with the gas flow and protects the sheath from excessive vibration.
- Process Connection: Threaded connections are suitable for many duct and equipment connections; flanged connections can be selected for larger or higher-duty installations.
- Sheath Selection: Select sheath material and construction according to flue gas temperature, corrosion risk, particulate loading, condensation and process pressure.
- Cable Connection: Select cable type, insulation and connection arrangement according to ambient temperature, cable distance and required measurement accuracy.
- Transmitter Integration: A head-mounted transmitter can be used where a 4–20 mA or other automation-compatible signal is required.
- Maintenance Access: Ensure the selected mounting arrangement permits inspection and maintenance without unnecessary interruption to the boiler or exhaust system.
