SIEMENS QRA10M.C UV Flame Detector with Mounting Flange

The SIEMENS QRA10M.C UV Flame Detector with Mounting Flange is a robust and highly reliable device engineered for critical flame monitoring applications in industrial combustion processes. Its advanced ultraviolet (UV) sensing technology, coupled with a durable construction and integrated mounting flange, ensures rapid and accurate detection of flames across a wide spectrum of fuels. Key advantages include its high sensitivity to UV radiation emitted by flames, fast response time for immediate safety action, and a wide operating temperature range, making it suitable for demanding environments. The QRA10M.C boasts features such as a sealed flame detector housing for enhanced protection against dust and moisture, and an integrated mounting flange for simplified and secure installation. Technical parameters include an operating voltage typically between 20-30 VDC, a current consumption of around 1.5 mA, and a response time of less than 1 second, with an operating temperature range of -40 to +60°C.

Product Specifications

| Specification              | Value                                      |

| :------------------------- | :----------------------------------------- |

| Detector Type              | Ultraviolet (UV)                           |

| Model                      | QRA10M.C                                   |

| Mounting                   | Integrated Flange                          |

| Operating Voltage          | 20-30 VDC                                  |

| Current Consumption        | ~ 1.5 mA                                   |

| Response Time              | < 1 second                                 |

| Operating Temperature      | -40 to +60°C                               |

| Flame Sensitivity          | High (UV spectrum)                         |

| Protection Rating          | IP65 (typical, with appropriate housing)   |

| Material                   | Die-cast aluminum housing (typical)        |

| Cable Entry                | PG 13.5 (typical)                          |

| Approvals                  | VDE, UL, CSA (check specific model)        |

Core Features & Market Positioning

The SIEMENS QRA10M.C distinguishes itself through its superior UV detection capabilities, offering a distinct advantage in identifying flames by their characteristic ultraviolet emissions, thereby minimizing false alarms from other heat sources. Its market positioning is firmly rooted in providing dependable, industrial-grade flame detection for applications where safety and operational continuity are paramount. Unlike simpler flame sensors, the QRA10M.C's robust design and advanced signal processing ensure reliable performance even in harsh industrial settings characterized by dust, moisture, and extreme temperatures. This makes it a preferred choice for Original Equipment Manufacturers (OEMs) and system integrators demanding high reliability and longevity in their combustion control systems.

Key Application Scenarios

The SIEMENS QRA10M.C UV Flame Detector is critically deployed in a variety of industrial combustion systems. Common applications include monitoring flames in industrial boilers, furnaces, and process heaters across sectors like power generation, petrochemicals, and manufacturing. Its ability to reliably detect flames from oil, gas, and pulverized coal combustion makes it indispensable for ensuring safe and efficient burner operation. Furthermore, it finds use in incinerators and thermal oxidizers for environmental control applications, where accurate flame presence verification is essential for operational integrity and regulatory compliance. The integrated mounting flange facilitates its installation directly onto burner housings or combustion chambers, streamlining the setup for these critical applications.

Practical System Integration Guidance

Integrating the SIEMENS QRA10M.C into existing combustion control systems is streamlined due to its standardized electrical interfaces and robust mechanical design. Typically, the detector connects to a suitable burner management system (BMS) or flame amplifier via a two-wire or three-wire connection, depending on the specific configuration and power requirements. Wiring should utilize shielded cable to prevent electromagnetic interference, with proper grounding being essential for optimal performance and safety. Ensure the mounting flange is securely fastened to a stable surface, providing a direct line of sight to the flame. For commissioning, it is crucial to verify correct polarity and voltage supply, and to conduct functional tests in conjunction with the BMS to confirm accurate flame signal transmission and response.

Operation and Risk Mitigation

The QRA10M.C operates by continuously monitoring the ultraviolet radiation emitted by a flame. When sufficient UV intensity is detected, the internal circuitry generates a signal that is transmitted to the control system. This immediate signal allows for rapid shutdown of fuel supply in case of flame failure, mitigating the significant risks associated with unburned fuel accumulation. To mitigate operational risks, regular visual inspections of the detector lens for dirt or obstruction are recommended. Faulty operation, such as intermittent signals or no signal, can often be traced to incorrect wiring, insufficient voltage, a dirty lens, or internal detector failure. Many control systems will register fault codes related to flame signal loss or instability, prompting necessary diagnostic actions.

Scalability & Long-Term Value

The SIEMENS QRA10M.C offers significant long-term value through its robust construction, designed for extended operational life in demanding industrial environments. Its compatibility with a wide range of Siemens burner control systems and flame amplifiers ensures seamless integration into both new installations and upgrades of existing infrastructure. This compatibility facilitates scalability, allowing for the expansion of monitoring capabilities across multiple combustion units without requiring a complete system overhaul. As industries move towards digitalization and the Industrial Internet of Things (IIoT), the QRA10M.C, when integrated with modern control platforms, can contribute valuable data for performance monitoring, predictive maintenance, and operational optimization, enhancing overall system efficiency and reliability.

Frequently Asked Questions

What is the primary function of the SIEMENS QRA10M.C?

Its main purpose is detecting flames using ultraviolet radiation for industrial combustion safety.

This detector ensures rapid flame recognition and signals potential flame failure. It plays a vital role in preventing hazardous conditions in boilers and furnaces.

The QRA10M.C is essential for reliable burner management systems and overall process safety.

How does the UV detection technology of the QRA10M.C work?

It senses ultraviolet light emitted by flames, which is a specific signature.

The detector converts this UV light into an electrical signal for the control system. This method offers high sensitivity and selectivity.

This allows it to distinguish flames from other heat sources, reducing false alarms.

What are the typical voltage and current requirements for the QRA10M.C?

This detector typically requires a DC voltage supply.

The operating voltage range is usually between 20 and 30 VDC. Current consumption is approximately 1.5 mA.

Ensure the power supply meets these specifications for optimal performance and longevity.

Can the SIEMENS QRA10M.C be used in outdoor or dusty environments?

Yes, its design often includes robust housing for protection.

With an appropriate enclosure, it typically achieves an IP65 rating for dust and water resistance. Always verify specific model ratings.

This makes it suitable for challenging industrial settings where environmental factors are a concern.

What is the response time of the SIEMENS QRA10M.C flame detector?

The detector offers a very fast response to flame detection.

Its response time is less than one second. This rapid detection is critical for safety interlocks.

Quick response minimizes risks associated with flame failures in combustion processes.

What is the operating temperature range for the QRA10M.C?

This flame detector is designed for wide temperature variations.

It can operate reliably in temperatures ranging from -40 to +60 degrees Celsius. This broad range suits harsh industrial conditions.

Its robust construction ensures performance across diverse climates and process temperatures.

How is the SIEMENS QRA10M.C typically installed?

Installation is facilitated by its integrated mounting flange.

The flange allows for secure and direct attachment to burner housings or combustion chambers. This ensures a clear view of the flame.

Proper mounting is crucial for accurate flame sensing and system reliability.

What kind of cable should be used when wiring the QRA10M.C?

Shielded cables are recommended for wiring.

Using shielded cables helps prevent electromagnetic interference in industrial environments. Proper grounding is also essential for signal integrity.

This ensures a clean and reliable signal transmission to the control system.

What happens if the QRA10M.C detects no flame when one should be present?

This indicates a potential flame failure or a detector issue.

The control system will typically initiate a safe shutdown sequence. This prevents fuel accumulation and potential hazards.

Troubleshooting should focus on burner operation, fuel supply, and detector functionality.

How does the QRA10M.C contribute to system scalability and long-term value?

Its compatibility with Siemens control systems allows easy integration.

This facilitates system upgrades and expansions without complete replacements. It offers a reliable long-term monitoring solution.

When linked to IIoT platforms, it provides data for optimization and predictive maintenance.