TEXON UV/IR Sensor 424.00.012

TEXON UV/IR Sensor 424.00.012 (Rev. 1) – Dual-Spectrum Optical Flame Detector

The TEXON UV/IR Sensor 424.00.012 is a dual-spectrum optical flame detector engineered for mission-critical marine machinery spaces, hazardous industrial zones, and offshore installations. By simultaneously monitoring narrow-band ultraviolet and narrow-band infrared radiation, the unit provides ultra-fast response times to hydrocarbon and non-hydrocarbon flame emissions while rejecting false triggers caused by arc welding, lightning, solar glare, hot piping, and halogen lighting.

Built to withstand severe marine engine room environments, the 424.00.012 features an explosion-proof, corrosion-resistant alloy housing with hermetically sealed optical quartz/sapphire windows. It integrates directly with central fire detection control units (FDCUs), addressable loop interfaces, or integrated monitoring and control systems (IAS) via relay contacts or 4–20 mA current loop architecture.

Model Details

• Manufacturer/Brand: TEXON
• Model Type: UV/IR Dual-Spectrum Flame Sensor
• Part Number (MPN): 424.00.012
• Hardware Revision: Rev. 1 / Rev. 0
• Reference/Catalog Code: 186117

Technical Specifications:

Key Features

1. Dual-Spectrum UV/IR Coincidence Logic: Requires simultaneous detection across both UV and infrared wavelengths before latching an alarm, preventing costly false shutdowns in high-noise engine spaces.
2. Rapid Millisecond Response: Detects standard (1 sq ft) pan fires within 15 to 30 milliseconds across an expansive 90° horizontal and vertical field of view (FOV).
3. Marine & Hazardous Zone Enclosure: Marine-grade cast alloy housing protected by an epoxy powder coat, rated IP66/IP67 and certified flameproof/explosion-proof for Zone 1 and Zone 2 areas.
4. Low-Power Operating Profile: Operates on standard 24 V DC (18–32 V DC tolerance) nominal supply with low standby current consumption (<65 mA).
5. Comprehensive Fault & Diagnostic Signaling: Built-in optical integrity self-test (Built-In-Test / BIT) monitors window cleanliness, sensor degradation, and internal circuit health via a dedicated Fault dry contact and status LED.

Applications

• Marine Machinery Spaces: Main engine tops, diesel generator sets, purifier rooms, auxiliary boilers, and fuel oil treatment modules.
• Offshore Oil & Gas: FPSO processing skids, wellhead platforms, turbine compressor enclosures, and riser balconies.
• Fuel Storage & Bunkering Facilities: Marine fuel manifold stations, pump rooms, LNG/LPG bunkering skids, and valve manifolds.
• Industrial & Thermal Power Plants: Gas turbine housings, heavy fuel pumping skids, paint spray booths, and industrial chemical storage tanks.

Compatibility & System Integration

The TEXON 424.00.012 is engineered for plug-and-play retrofit and new installation integration across major marine and offshore automation platforms:

• Conventional Fire Alarm Panels: Compatible with Consilium (Salwico CS4000, CS3000, CCP systems), Autronica (AutroSafe / Autroprime via loop input modules), Tyco / Johnson Controls (Minerva Marine, T2000), and Siemens Cerberus systems.
• PLC & Distributed Control Systems (DCS): Direct connection to standard 24 V DC digital and 4–20 mA analog input modules (Kongsberg K-Chief, Valmet DNA, Wärtsilä Nacos, Siemens S7-1500 / ET200SP).
• Addressable Loop Transponders: Integrates seamlessly across line transponders and contact monitors accepting dry potential-free contacts.

Frequently Asked Questions

What makes the TEXON 424.00.012 UV/IR sensor more reliable than standard single-spectrum IR or UV sensors?

Single UV sensors can be falsely triggered by lightning, high-voltage corona discharges, or hot tungsten lamps, while single IR sensors can react to hot exhaust manifolds and modulated sunlight reflections. The TEXON 424.00.012 evaluates both UV radiation and the 4.3 µm infrared combustion band simultaneously. An alarm is generated only when both optical criteria are matched within a precise time window.

Can the 424.00.012 be connected directly into a 4–20 mA PLC loop?

Yes. The unit incorporates a 3-wire 4–20 mA current output (Terminal 09). It transmits 0 mA for fault conditions, 4 mA for normal monitoring, and 20 mA during an active fire condition, allowing direct interfacing with automation PLCs and scada systems without requiring auxiliary relays.

How is the sensor tested during routine shipboard safety surveys?

The unit can be tested without open flames by using an approved explosion-proof UV/IR combined test torch positioned between 1 and 3 meters from the lens. Alternatively, triggering the remote Built-In-Test terminals initiates an onboard optical simulation to verify sensor pickup and relay actuation.

What is the recommended mounting torque for the terminal connections?

Use a calibrated terminal screwdriver set between 0.5 and 0.6 Nm on the screw cage clamps. Over-tightening can strip the copper lead frames, while loose connections cause micro-arcing that simulates intermittent sensor fault codes.