Description
Forney 85UVF1-1CEX-K3 UniFlame II Flame Detector
The Forney 85UVF1-1CEX-K3 is a microprocessor-based UniFlame II flame detector designed for high-integrity industrial burner management systems. This intelligent sensor utilizes an ultraviolet (UV) solid-state photodiode to monitor the presence or absence of a target flame in multi-burner furnaces, utility boilers, and chemical process heaters, providing critical safety interlock signals to prevent catastrophic fuel accumulation.
Commercial Availability & Order Fulfillment
- Inventory Status: In Stock
- Estimated Dispatch Lead Time: 1 to 2 business days from order confirmation
- Product Condition: New Original (Factory Sealed Box)
- Warranty Period: 12-Month Supplier Warranty
- Commercial Pricing Note: The valuation displayed on global B2B platforms is intended as a marketplace benchmark rather than a fixed contractual price. Final procurement costs are determined by current factory availability, global shipping tariffs, and trade volume agreements. Please submit a direct inquiry to secure a firm, itemized commercial quote.
Hardware Configuration & Technical Specifications
| Parameter / Code Segment | Specification Detail / Value |
| Manufacturer | Forney Corporation |
| Product Series | UniFlame II Series |
| Model Number | 85UVF1-1CEX-K3 |
| Sensor Technology | Ultraviolet (UV) Solid-State Photodiode |
| Spectral Range | 185 to 260 nm |
| Enclosure Rating | ATEX / IECEx Explosion-Proof Certified (CEX designation) |
| Supply Voltage Required | 24 V DC nominal (22 to 26 V DC limits) |
| Flame Relay Output | SPST (Form A) Dry Contact |
| Analog Output Signal | 4 to 20 mA linear flame intensity signal |
| Electrical Connection | Integrated quick-disconnect cable assembly (K3 configuration) |
Field Engineering & Maintenance Insights
Sighting the optical scanner head is the most critical step during installation. In field deployments on heavy fuel oil burners, we found that even a minor accumulation of soot on the quartz lens will attenuate the UV radiation below the minimum flame detection threshold. If your system trips randomly during firing transitions, don’t assume the electronics are dead; first check that the target flame’s root zone remains within the detector’s direct line of sight across the entire modulating range.
The “CEX” marking indicates a ruggedized housing designed for hazardous, explosion-proof environments. When wiring this unit within Class I, Division 1 areas, ensure that the conduit seals are completely poured with approved sealing compound. Well, technically the internal electronics are isolated, but allowing moisture or explosive gases to seep through the conduit run will compromise the explosion-proof rating and cause corrosion on the internal terminal pins.
This model includes an integrated 4 to 20 mA loop that transmits real-time flame intensity back to the Burner Management System (BMS) PLC. When tuning the flame relay marginal thresholds via the Forney user software, check that your background frequency discrimination filters out the radiation from adjacent burners. Honestly, failing to tune out background flame flicker is the number one cause of dangerous “flame-on” false indications when the target burner is actually extinguished.
Cross-Border Logistics & Trade Compliance
Our international supply chain division manages the secure export of flame safety instrumentation to critical power, petrochemical, and manufacturing operations worldwide. Because Forney combustion control hardware is classified as specialized industrial boiler infrastructure, we ensure absolute adherence to international dual-use export regulations and documentation standards.
Each detector is packaged in custom-molded, shock-absorbing material to safeguard the optical alignment during international transit. All export files come complete with standardized commercial invoices, accurate packing lists, and the exact Harmonized System (HS) code classification for optical monitoring instruments to guarantee efficient customs clearance at all global entry ports. Standard express air freight tracking is initiated upon shipment.
