Siemens QRI2B2.B180B1 Flame Detector for QRI2B

Siemens QRI2B2.B180B1 Flame Detector for QRI2B Series

The Siemens QRI2B2.B180B1 is a precision infrared flame detector engineered for seamless integration within the QRI2B Series burner management and combustion control architecture. Rather than functioning as a standalone sensing component, this detector is designed to operate as a critical node within a layered automation system — connecting the field-level flame sensing layer directly to the burner control logic layer, enabling real-time signal validation, safety interlock execution, and system-wide combustion supervision. In industrial environments where process continuity, personnel safety, and regulatory compliance are non-negotiable, the QRI2B2.B180B1 delivers the detection reliability and architectural compatibility that modern control systems demand.

Within a complete burner control system, the QRI2B2.B180B1 interfaces directly with Siemens burner controllers such as the LME11, LME21, LME39, LFL1, and LGK16 series, forming the sensing backbone of the combustion safety chain. Its infrared detection principle ensures stable flame recognition across a wide range of fuel types — including natural gas, light oil, and dual-fuel configurations — making it suitable for boilers, industrial furnaces, thermal oxidizers, and process heaters across manufacturing, petrochemical, power generation, and district heating applications.

Product Specification Table

System Compatibility Notes

The QRI2B2.B180B1 achieves its full operational value when deployed within a coordinated Siemens burner management architecture. At the control layer, Siemens LME39 or LFL1 burner controllers serve as the primary logic processors, receiving the flame signal from the QRI2B2.B180B1 and executing the safety interlock sequence — including ignition, run permissive, and lockout logic. For larger multi-burner installations, the RWF55 or RWF10 combustion controllers provide supervisory setpoint management, coordinating fuel-air ratio control alongside the flame detection chain.

At the I/O and signal layer, the QRI2B2.B180B1 connects directly to the controller’s flame input terminal, eliminating the need for intermediate signal conditioning in standard single-burner configurations. For systems requiring remote diagnostics or BMS integration, the OCI345 or OCI55 communication interfaces bridge the burner controller to building automation networks via LPB or BSB protocols, enabling the flame status signal to be monitored at the supervisory control level without interrupting the hardwired safety chain.

At the power layer, Siemens AGG5 or AGG6 series power supply modules ensure stable voltage delivery to the burner controller and associated field devices, including the QRI2B2.B180B1. Proper power architecture is essential in combustion systems, where voltage fluctuations can cause nuisance lockouts or delayed flame recognition — both of which impact process uptime and safety audit compliance.

For HMI and operator interface integration, the QRI2B2.B180B1 flame status is typically surfaced through Siemens RWF or synco controllers with integrated display, or via third-party SCADA systems connected through the OCI communication gateway. Operators can monitor flame presence, lockout history, and burner cycle counts from a centralized interface, supporting both real-time supervision and long-term maintenance planning.

In redundant burner architectures — common in critical process heating and power plant auxiliary systems — dual QRI2B2.B180B1 detectors may be deployed on a single burner with cross-monitoring logic implemented in the LFL1 or LGK16 controller, providing voting-logic flame confirmation and eliminating single-point detection failure as a system risk.

Industrial Application Notes

In manufacturing and process heating environments, the QRI2B2.B180B1 is deployed in direct-fired air heaters, oven burner systems, and thermal treatment furnaces where continuous flame supervision is required to maintain product quality and comply with EN 746 or NFPA 86 combustion safety standards. Its fast response time and stable IR detection ensure that flame failure events are captured within the controller’s safety response window, preventing unburned fuel accumulation.

In power generation and district heating plants, the detector supports boiler burner management systems where multiple burners operate in staged or modulating configurations. Integration with the LFL1 multi-burner controller allows the QRI2B2.B180B1 to participate in a coordinated flame supervision matrix, where individual burner flame status contributes to the overall boiler safety interlock logic.

In petrochemical and refinery applications, the QRI2B2.B180B1 is used in process heater and fired equipment burner management systems, where SIL-rated safety instrumented systems (SIS) require reliable flame detection as a safety function input. Its compatibility with Siemens burner controllers that carry CE and EN 298 certification supports the overall functional safety documentation required for these installations.

In water treatment and municipal infrastructure facilities, the detector supports sludge dryer burners and biogas combustion systems, where fuel composition variability demands a detector with robust IR sensing capable of recognizing flames from low-calorific-value gases without false lockout events.

Product Compatibility FAQ

Q1: Is the QRI2B2.B180B1 compatible with all Siemens LME and LFL series burner controllers?
The QRI2B2.B180B1 is designed for use with Siemens QRI2B Series-compatible controllers, including the LME11, LME21, LME39, and LFL1 families. Compatibility depends on the specific controller variant and its flame input circuit specification. Always verify the controller’s technical datasheet to confirm the flame detector input type (AC or DC, resistance or photocurrent) matches the QRI2B2.B180B1 output characteristics before installation. Our technical team can assist with cross-reference verification as part of the warranty terms confirmed during quotation support service.

Q2: Can the QRI2B2.B180B1 be used in a redundant dual-detector configuration for enhanced system reliability?
Yes. In applications requiring higher availability or SIL compliance, two QRI2B2.B180B1 detectors can be mounted on the same burner sight tube assembly using appropriate adapter fittings, with each detector wired to an independent flame input channel on controllers such as the LFL1 or LGK16 that support dual-detector voting logic. This architecture eliminates single-point flame detection failure and supports 1oo2 (one-out-of-two) voting configurations. System integrators should document the redundancy architecture in the burner management system (BMS) functional safety assessment.

Q3: What does the warranty terms confirmed during quotation cover, and how does it support long-term maintenance planning?
The warranty terms confirmed during quotation covers manufacturing defects, component failure under normal operating conditions, and functional non-conformance to the published Siemens QRI2B2.B180B1 specification. Warranty coverage begins from the date of shipment and includes replacement or repair at no additional cost. For maintenance planning purposes, we recommend establishing a scheduled inspection interval aligned with your burner management system’s annual proof-test requirement, and maintaining a spare QRI2B2.B180B1 in your site inventory to minimize unplanned downtime during detector replacement. Our supply chain team supports standing order arrangements to ensure continuous stock availability throughout your system’s operational lifecycle.