Honeywell U2-1018S-PF 24VDC Flame Signal Processor & UV/IR

Honeywell U2-1018S-PF 24VDC Integrated Flame Signal Processor & UV/IR Viewing Head

The Honeywell U2-1018S-PF is a next-generation all-in-one industrial flame monitoring device that combines a dual-sensor viewing head with an integrated signal processor in a single ruggedised container. This heavy duty equipment utilises a solid 24VDC power supply and uses a high precision Ultraviolet (UVTron) tube and a Solid State Infrared (IR) sensor on the same optical axis.

Designed for complex multi-burner, multi-fuel applications and extremely demanding combustion applications, the U2-1018S-PF eliminates the need for individual rack-mounted signal processing enclosures, resulting in significant savings in external wiring, installation space, and overall system architecture costs.

Model Details:

Manufacturer Part Number (MPN): U2-1018S-PF

Related Models in the U2S Family:

U2-1010S-PF: Triple sensor configuration (IR / UV Solid State / UVTron) for complex, multi-fuel burners.

U2-1016S-PF: Dedicated UVTron sensor model designed primarily for clean gaseous fuels.

U2-1018S (Base Model): Quick-disconnect plug version instead of the hardwired pipe fitting (-PF) enclosure.

Key Fetures:

1. Dual-Sensor UV/IR Flame Discrimination: Combines a synchronised UVTron tube (210nm) and Solid-State IR photodiode (1400nm) with customisable flicker frequency filters to distinguish targeted burner flames from background radiation and nearby burner interference.
2. All-in-One Localised Processing: Combines the viewing head and signal processor in a single enclosure, eliminating the requirement for remote control-room cabinets and reducing loop resistance across lengthy wiring distances.
3. Shutterless Electronic Self-Check: Replaces failure-prone mechanical shutters with an automated electronic dynamic self-check mechanism. Provides non-stop safety monitoring ideal for continuous-firing systems.
4. Intuitive TouchWheel User Interface: An integrated capacitive TouchWheel interface behind tempered glass allows the maintenance personnel to customise gain, flame-on thresholds, and delay files without risking the explosion-proof seal.
5. SIL 3 Capable Global Certification: Designed to comply with rigorous international combustion safety requirements, including FM Class I Div 1/Div 2, CSA, CE (EN298) and SIL 3 safety integrity levels for hazardous zones.

Technical Specifications

Engineer’s Insight:

In marine and heavy industrial environments, false flame trips aren’t just an inconvenience—they cause thermal shock, drop steam pressure, and disrupt critical plant infrastructure. The beauty of the Honeywell U2-1018S-PF lies in its dual optical configuration. In marine boilers that transition from heavy fuel oil (HFO) to marine gas oil (MGO) or natural gas, a single-spectrum scanner often struggles with the changing flame characteristics. By balancing the high-frequency flicker of the IR sensor with the raw ionization tracking of the UVTron tube, this processor keeps your combustion management loops perfectly stable through any fuel transition