Fireye 95DSS3-1CEX Explosion-Proof UV Flame Scanner
The Fireye 95DSS3-1CEX is an explosion-proof ultraviolet flame scanner from the Fireye InSight II series, manufactured by Fireye. This device is a critical flame detection component within a burner management system, specifically designed for use in hazardous areas where flammable gases or vapors may be present. Its primary function is to detect the presence of ultraviolet radiation emitted by a flame and provide a reliable, fail-safe signal to the burner control system to confirm successful ignition and continuous flame presence.
Technical Specifications
The 95DSS3-1CEX operates on 24 VDC power and features electronic self-checking for continuous integrity monitoring. The scanner detects UV wavelengths typically in the range of 185 to 260 nanometers emitted by the flame, providing high sensitivity to gas and oil flames while being largely immune to sunlight and hot refractory radiation. The viewing angle is typically narrow at 10 to 20 degrees, providing precise targeting of the flame and reducing susceptibility to background radiation. The scanner head operating temperature range is minus 40 degrees Fahrenheit to plus 165 degrees Fahrenheit, equivalent to minus 40 degrees Celsius to plus 74 degrees Celsius.
Explosion-Proof Certification
The 1CEX suffix in the model number specifically denotes hazardous area certification. The scanner is housed in a robust, explosion-proof enclosure certified for use in Class I, Division 1, Groups C and D hazardous locations under UL Listing, corresponding to environments with flammable gases such as hydrogen, ethylene, propane, or natural gas. Additional certifications include CSA certification for similar classifications, as well as ATEX and IECEx certifications for international markets. The scanner also carries certifications for Class II, Division 1, Groups E, F, G, and Class III locations for combustible dust hazards.
Installation and Features
The 95DSS3-1CEX is typically mounted on the burner or combustion chamber, looking directly at the flame through a sighting tube or quartz window. Unlike other models with quick disconnect cables, the 1CEX variant features internal terminal blocks for cable connection, providing a secure and sealed electrical interface suitable for hazardous area installations. The scanner is designed to be paired with a compatible Fireye amplifier or control module located in a safe area, which processes the scanner signal and provides relay outputs for flame status indication.
InSight II Series Features
The Fireye InSight II Type 95DSS3 flame scanners are microprocessor-based flame scanners utilizing solid-state ultraviolet sensors. The InSight II scanners incorporate two internal flame relays with adjustable ON/OFF thresholds and two 4-20 mA analog outputs, eliminating the need for a remote flame amplifier. The scanners have either an attached keypad and VFD display or an infrared transmitter for a remote handheld keypad and display. These advanced features enable comprehensive configuration and diagnostic capabilities directly at the scanner location.
Applications
The Fireye 95DSS3-1CEX is deployed in burner management systems for industrial boilers, furnaces, and process heaters located in hazardous areas. Typical applications include oil and gas refineries where flammable gases are present, chemical processing plants with combustible atmospheres, power generation facilities using gas or oil-fired boilers, and industrial heating systems in petrochemical facilities. The scanner is also used in offshore platforms, marine boiler systems, and any combustion application where explosion-proof equipment is required for safe operation in potentially hazardous environments.
