The Mekasentron UX300 Long-Range Optical Flame Detector is an advanced, high-performance ultraviolet and infrared combined flame detection device engineered and manufactured by Mekasentron Inc. (Korea). Building upon the proven optical architecture of the UX150, the UX300 model features an enhanced sensor matrix and upgraded Digital Signal Processing (DSP) algorithms, extending the guaranteed detection range to 30 meters for standard n-Heptane pan fires while holding comprehensive international explosion-proof certifications including ATEX (Europe), IECEx, KFI, KGS, and NEPSI.

The core operating principle of the Mekasentron UX300 relies on the synchronized integration of a high-sensitivity Ultraviolet (UV) sensor capturing shortwave solar-blind radiation and a specialized Infrared (IR) sensor detecting characteristic combustion thermal patterns. When a fire breaks out, the internal 32-bit microprocessor performs real-time spectral cross-correlation and flicker frequency analysis. This intelligent dual-verification algorithm provides complete immunity against false alarms caused by non-fire optical disturbances such as arc welding, direct sunlight, high-intensity halogen lamps, lightning, hot machinery radiation, and flashing strobe lights.

The Mekasentron UX300 is specialized for the detection of non-luminous, invisible Hydrogen (H2) flames—critical for hydrogen fuel cell infrastructure, clean energy storage, and chemical synthesis—while providing broad detection coverage for standard Hydrocarbon fuels (n-Heptane, gasoline, diesel, methane, alcohol, and industrial solvents). With a wide conical Field of View (FOV) of 90° x 90° (expandable up to 100° – 120°) and a rapid response time of under 5 seconds, the detector ensures immediate signal transmission to fire alarm control panels and automated extinguishing systems.

Constructed for demanding industrial environments, the UX300 is enclosed in a heavy-duty die-cast aluminium housing with an epoxy powder-coated finish (optional SUS316 Stainless Steel), achieving IP66/IP67 ingress ratings against water jetting and particulate ingress across an operating temperature range of -40°C to +75°C. With hazardous location ratings 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 hazardous areas. Equipped with Form A Fire Alarm relays, Form B Fault Alarm relays, and an industrial RS-485 Modbus RTU serial interface, it integrates into building fire alarm control panels or industrial SCADA/DCS automation architectures.

• Manufacturer: Mekasentron Inc. (Korea)
• Product Series: Long-Range UV/IR Explosion-Proof Optical Flame Detectors
• Model: UX300
• 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: 30 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, rated 2A @ 30V DC
  - Fault Alarm Relay: Form B (NC), normally energized, rated 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
• 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