The Mekasentron UX500 Ultra Long-Range Optical Flame Detector represents the flagship pinnacle of automated fire and explosion monitoring technology engineered and manufactured by Mekasentron Inc. (Korea). Developed specifically to fulfill the most demanding fire protection requirements across massive industrial infrastructure, the UX500 incorporates an ultra-sensitive optical sensor matrix coupled with advanced 32-bit Digital Signal Processing (DSP) algorithms, extending the guaranteed effective detection range to 50 meters for standard n-Heptane pan fires while holding comprehensive international explosion-proof certifications including ATEX (Europe), IECEx, KFI, KGS, and NEPSI.

The operating architecture of the Mekasentron UX500 integrates a high-sensitivity narrow-band Ultraviolet (UV) sensor capturing solar-blind wavelengths with a specialized Infrared (IR) sensor detecting characteristic combustion thermal emissions. When a fire occurs, the central microprocessor simultaneously evaluates spectral UV/IR cross-correlation and performs optical flicker frequency analysis. This proprietary dual-verification mechanism provides total immunity against false alarms induced by non-fire optical disturbances such as solar radiation, industrial arc welding, lightning strikes, high-intensity halogen lamps, machinery heat emissions, and plant warning beacons.

The detector is specially calibrated for the detection of non-luminous, invisible Hydrogen (H2) fires—critical for green hydrogen production, fuel cell stations, and chemical synthesis plants—while providing comprehensive monitoring coverage for standard Hydrocarbon fuels (n-Heptane, gasoline, diesel, methane, alcohol, and chemical solvents). With a wide conical Field of View (FOV) of 90° x 90° (expandable up to 100° – 120°) and a swift response time of under 5 seconds, the UX500 ensures immediate activation of fire alarm control panels, deluge valves, or automated extinguishing systems.

Constructed for severe industrial environments, the UX500 is enclosed in a heavy-duty die-cast aluminium housing with an epoxy powder-coated finish (optional SUS316 Stainless Steel), achieving IP66/IP67 ingress protection ratings across an ambient operating temperature range of -40°C to +75°C. With hazardous area classifications of Ex db IIC T6 Gb and Ex db IIB+H2 T6 Gb, it is certified for continuous deployment in Zone 1 and Zone 2 explosive atmospheres. It features Form A Fire Alarm relays, Form B Fault Alarm relays, and an industrial RS-485 Modbus RTU serial communication interface, ensuring integration into building fire alarm control panels or plant-wide SCADA/DCS networks.

• Manufacturer: Mekasentron Inc. (Korea)
• Product Series: Ultra Long-Range UV/IR Explosion-Proof Optical Flame Detectors
• Model: UX500
• Sensing Principle: Dual Spectral Response (Ultraviolet & Infrared optical sensors)
• Monitored Hazards: Hydrogen (H2) gas fires and Hydrocarbon-based fires (Gasoline, Diesel, n-Heptane, Alcohol, LPG/LNG, Chemical Solvents)
• Detection Range: 50 meters for standard n-Heptane test fire (0.1 m² pan fire)
• Field of View (FOV): 90° horizontal × 90° vertical (Maximum coverage up to 100° ~ 120°)
• Response Time: Under 5 seconds (< 5s)
• Explosion-Proof Classifications:
  - Ex db IIC T6 Gb, IP66/67 (ATEX)
  - Ex db IIB+H2 T6 Gb, IP66 (ATEX, IECEx, NEPSI)
  - Ex tb IIIC T85ºC Db, IP66/67 (ATEX)
• Ingress Protection Rating: IP66 / IP67
• Operating Voltage: 18V to 30V DC (Nominal DC 24V)
• Power Consumption: Operating current ~100mA / Maximum power ≤ 3W (@24V DC)
• Relay Outputs:
  - Fire Alarm Relay: Form A (NO), latching, contact rating 2A @ 30V DC
  - Fault Alarm Relay: Form B (NC), normally energized, contact rating 2A @ 30V DC
• Digital Interface: RS-485 Serial Communication (Modbus RTU compatible)
• Electromagnetic Compatibility: High-immunity industrial EMC protection
• Dimensions (W x H x D): 94 mm x 96 mm x 105 mm
• Conduit Entry Size: M20 × 1.5 mm (Optional 1/2" NPT)
• Recommended Wiring: Shielded twisted-pair cable 14 AWG to 24 AWG
• Enclosure Material: Heavy-duty Die-Cast Aluminium with Epoxy Coating (Optional: SUS316 Stainless Steel)
• Shipping Weight: Approx. 1.4 kg (SUS316 version: ~3.2 kg)
• Operating Temperature Range: -40 °C to +75 °C
• Operating Humidity Range: 0% to 95% Relative Humidity (non-condensing)
• Quality Approvals & Certifications: ATEX, IECEx, KFI, KGS, NEPSI, CE, RoHS compliant