Description
Product Overview
95UVS2-1CEX is a microprocessor-based ultraviolet flame scanner from Fireye InSight I 95 series, built with ATEX EExd IIC T6 explosion-proof enclosure for hazardous area burner management systems. This integrated UV flame detector incorporates solid-state UV sensor, built-in flame relay and digital signal processing. It analyzes flame flicker frequency to discriminate real flame from false UV interference such as sunlight or electric arcs, directly working with burner control systems without external flame amplifier. The suffix CEX denotes explosion-proof certified version for explosive gas zones.
Technical Specifications
| Item | Parameter |
|---|---|
| Manufacturer | Fireye (Emerson Combustion Safety) |
| Part Number | 95UVS2-1CEX |
| Product Type | UV Flame Scanner, InSight I S2 enhanced version |
| Detection Principle | Ultraviolet (UV) flame sensing, 295~320nm wavelength |
| Explosion Certification | ATEX EExd IIC T6, CE approved |
| Power Supply | 24 VDC |
| Output Signals | 4-20mA analog flame strength signal; internal flame relay (NO/NC); Modbus RTU RS485 |
| Fuel Compatibility | Natural gas, propane, light fuel oil, multi-fuel burners |
| Operating Temperature | -40 °C ~ +65 °C |
| Enclosure Rating | IP66 / NEMA 4X |
| Mount Thread | 1 inch NPT sight tube mounting |
| Display | Local LCD screen for flame signal, status and diagnostic data |
| Weight | Approx. 2.2 kg |
| Memory | 4 configurable flame signature files for multiple burner profiles |
Key Features
- Explosion-Proof Construction: EExd IIC T6 flameproof housing, suitable for Class I Div 1 / Zone 1 hazardous locations in petrochemical and gas plants.
- S2 Enhanced Firmware: Stores four independent flame signature profiles, supports remote file selection via dry contact inputs for multi-burner switching.
- Built-in Flame Relay: Integrated relay contact output for burner safety interlock; no separate amplifier module required to reduce spare parts count.
- Modbus RTU Digital Communication: RS485 interface to connect with DCS, BMS or SCADA for real-time flame value, alarm and diagnostic data transmission.
- Flame Flicker Discrimination: Microprocessor analyzes unique flame modulation frequency to avoid false trips caused by stray UV radiation.
- Comprehensive Self-Diagnostics: Continuous sensor health check, lens contamination monitoring, wiring fault detection with local LED and LCD alarm indication.
- Local LCD Interface: Onboard display for flame strength reading, parameter configuration and troubleshooting without extra handheld tool.
Applications
- Petrochemical plant furnace and reformer burner flame monitoring
- Thermal power plant gas / oil boiler burner management system (BMS)
- Cogeneration and industrial on-site power boiler safety supervision
- Refinery hazardous zone combustion control
- Metallurgical furnace and process heater flame detection
Installation & Maintenance Notes
- Install via 1-inch NPT sight tube; align optical sight path directly to burner flame zone.
- Keep scanner lens clean; soot accumulation will reduce UV signal and cause false flame loss alarms.
- Verify ATEX installation rules, proper cable gland and sealing for explosion-proof integrity.
- Configure flame threshold and flicker frequency profile on site, perform auto-tune during commissioning.
- Separate Modbus signal cable from high voltage ignition wiring to prevent electromagnetic interference.
- Periodically inspect lens, gasket and enclosure seal integrity during unit outages.
FAQ
Q: What does CEX stand for in 95UVS2-1CEX? A: CEX means ATEX EExd IIC T6 explosion-proof flameproof housing, certified for installation in Zone1 hazardous explosive gas environments.
Q: What is the difference between 95UVS2-1CEX and 95IRS2-1CEX? A: 95UVS2-1CEX is UV detector for gas and light oil; 95IRS2-1CEX is infrared IR scanner for heavy oil / coal flame monitoring.
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