Honeywell 113228/U UV Flame Sensor

Product Details

113228/U Product Description

The Honeywell 113228/U is a precision ultraviolet (UV) flame sensor engineered for seamless integration into industrial burner control architectures. Designed as a core detection component within Honeywell's flame safeguard ecosystem, this sensor delivers reliable, high-speed flame presence verification across combustion systems operating in demanding process environments. Its system-matched electrical interface and signal output characteristics make it a direct-fit solution for Honeywell R4343, R7847, R7848, and R7849 series flame amplifiers, enabling consistent signal flow from the detection layer through to the burner management control layer without signal conditioning gaps or protocol mismatches.

In modern industrial control architecture, flame detection is not an isolated function — it is a critical node within a layered safety and control hierarchy. The 113228/U occupies the sensing layer of this hierarchy, feeding verified UV flame signals to the flame amplifier module, which in turn communicates flame status to the burner management system (BMS) or programmable logic controller (PLC). This signal chain must be electrically stable, latency-minimal, and diagnostically transparent. The 113228/U satisfies all three requirements, providing a fast-response UV detection window optimized for natural gas, oil, and dual-fuel burner applications across boiler, furnace, kiln, and thermal oxidizer installations.

From a control architecture standpoint, the 113228/U integrates at the field device layer, interfacing directly with Honeywell's RM7800 series burner management relay modules and S7800 series display modules. This integration enables the BMS to execute pre-purge, ignition, flame establishment, and post-purge sequences with full flame signal traceability. When paired with Honeywell's Q7800 SOLA system or Modbus-capable relay modules, flame status data can be surfaced to SCADA or DCS platforms — including Honeywell Experion PKS, Siemens PCS 7, or ABB System 800xA — enabling centralized combustion monitoring across multi-burner installations.

The sensor's UV detection principle provides inherent immunity to infrared (IR) radiation from hot refractory surfaces, eliminating false-flame signals that can compromise burner safety logic in high-temperature environments. This characteristic is particularly valuable in continuous process applications such as cement kilns, glass furnaces, and petrochemical heaters, where ambient thermal radiation levels are elevated and IR-based sensors may produce unreliable outputs. The 113228/U's spectral selectivity ensures that only genuine UV emission from an active flame triggers a positive detection signal, maintaining the integrity of the safety interlock chain.

Pre-shipment testing is conducted on every unit prior to dispatch. Each 113228/U is verified for UV spectral response, electrical continuity, and connector integrity before packaging. This pre-shipment validation protocol, combined with a 12-Month Warranty covering manufacturing defects and performance deviations, ensures that field engineers receive a sensor ready for immediate installation and commissioning without requiring incoming inspection beyond visual checks.

The 113228/U achieves its full operational value when deployed within a coherent, multi-layer automation platform rather than as a standalone component. At the control layer, Honeywell RM7800L or RM7800M burner management relay modules serve as the primary logic execution units, receiving the UV flame signal from the 113228/U via a compatible R7847C or R7848A flame amplifier. These amplifiers condition the raw UV sensor output into a clean, relay-compatible signal that the BMS module can act upon within its safety-rated response time window.

At the I/O and communication layer, Honeywell S7800A1142 display modules provide local operator visibility into burner status, lockout codes, and flame signal strength — critical for commissioning and fault diagnosis without requiring laptop connectivity. For facilities running distributed control, the Q7800B SOLA gateway enables Modbus RTU or BACnet communication between the RM7800 series BMS and plant-level DCS or SCADA platforms, allowing flame status, trial-for-ignition counters, and lockout history to be logged centrally.

At the power layer, Honeywell Q7230A or equivalent 24 VAC/VDC power supplies provide stable excitation voltage to the flame amplifier and sensor circuit. Voltage stability at this layer directly affects UV sensor sensitivity thresholds and amplifier gain calibration — making power supply selection a non-trivial architectural decision in multi-burner panel designs.

For redundant flame detection architectures — common in power generation boilers and large process heaters — dual-sensor configurations using two 113228/U units with independent R7848A amplifiers feeding a voting logic module provide 1oo2 or 2oo2 detection redundancy. This redundancy architecture eliminates single-point detection failures and satisfies SIL 2 burner safety requirements under IEC 61511 for high-demand process applications.

At the HMI layer, Honeywell's HC900 hybrid controller or third-party HMI panels (such as Siemens TP700 Comfort or Weintek MT8000 series) can display real-time flame status, burner sequencing state, and alarm history when integrated via the Q7800 gateway. This visibility layer is essential for operator situational awareness in multi-burner boiler houses and process heater trains. At the protection layer, flame failure relay outputs from the RM7800 series feed into safety PLCs or safety relay modules — such as Pilz PNOZ or Siemens ET 200SP F-modules — to execute emergency shutdown sequences in compliance with NFPA 85 and EN 746-2 combustion safety standards.

Power Generation & Utility Boilers: In coal-fired or gas-fired utility boilers, the 113228/U provides UV flame detection for individual burner registers within multi-burner windbox assemblies. Integrated with RM7800 series BMS modules and plant DCS via Modbus gateways, the sensor supports automated burner management sequencing, flame failure alarming, and combustion optimization routines across boiler loads from minimum stable load to full capacity.

Petrochemical & Refinery Process Heaters: Fired heaters in crude distillation, hydrotreating, and reforming units require reliable UV flame detection immune to the high IR background radiation present in radiant sections. The 113228/U's UV selectivity makes it the preferred detection technology for these applications, where false-flame signals could mask actual flame failures and create hazardous fuel accumulation conditions.

Cement & Mineral Processing Kilns: Rotary kilns operating on heavy fuel oil or pulverized coal benefit from the 113228/U's robust UV detection capability in high-dust, high-temperature environments. The sensor's compact form factor allows installation in tight burner pipe assemblies, and its compatibility with Honeywell's flame safeguard relay platform simplifies integration into existing kiln control panels without requiring amplifier replacement.

Marine & Offshore Combustion Systems: Shipboard boilers and offshore platform process heaters operating under DNV or Lloyd's Register classification requirements benefit from the 113228/U's proven UV detection reliability and Honeywell's global service network, supporting compliance with marine combustion safety regulations and minimizing vessel downtime during scheduled maintenance intervals.

Food & Beverage Thermal Processing: Direct-fired ovens, dryers, and steam generators in food processing facilities require flame detection systems that meet both combustion safety standards and hygienic area classification requirements. The 113228/U's sealed construction and compatibility with standard Honeywell BMS platforms supports integration into these environments with minimal additional engineering effort.

Q1: Is the Honeywell 113228/U compatible with all RM7800 series burner management modules? The 113228/U is designed for use with Honeywell R4343, R7847, R7848, and R7849 series flame amplifiers, which are the standard amplifier interfaces for RM7800 series BMS modules. Compatibility depends on the specific amplifier socket configuration of the RM7800 variant in use. For RM7800L, RM7800M, and RM7800G modules, verify the amplifier type specified on the relay module nameplate before ordering. Our technical team can confirm compatibility based on your existing BMS model and wiring configuration.

Q2: Can the 113228/U be used in a redundant dual-sensor flame detection architecture? Yes. Dual 113228/U configurations with independent R7848A amplifiers are a recognized approach for achieving 1oo2 or 2oo2 flame detection redundancy in high-demand safety applications. Each sensor-amplifier pair operates independently, with voting logic implemented at the BMS or safety PLC level. This architecture is applicable to SIL 2 burner safety functions under IEC 61511 and is commonly specified for large utility boilers and refinery process heaters. Contact us for application-specific redundancy architecture guidance.

Q3: What does the 12-Month Warranty cover, and what is the lead time for in-stock units? The 12-Month Warranty covers manufacturing defects, UV spectral response deviations, and electrical performance failures under normal operating conditions. Warranty claims are processed with replacement unit dispatch within 5 business days of confirmed fault verification. In-stock 113228/U units are available for same-week dispatch following order confirmation. Pre-shipment testing — including UV response verification, electrical continuity check, and connector integrity inspection — is completed on every unit before dispatch, ensuring field-ready condition upon arrival.