In oil, gas, fuel storage and chemical risk areas, open flame can become a serious safety threat within a very short time. These locations may contain flammable liquid, combustible gas, solvent vapor or process equipment that requires fast flame detection and reliable system response.
For this type of industrial fire safety project, a flame detector is often selected because it detects open flame radiation directly. Unlike smoke detection, which depends on smoke movement, or heat detection, which depends on temperature rise, flame detection is designed to identify fire at the flame stage.
ANWETECH AT-FD02-UVIR3 is an explosion-proof UV/IR3 flame detector designed for fast and reliable detection of open flames in industrial environments. According to the manual, it is a point-type UV/IR combined flame detector using an infrared sensor, a solar-blind ultraviolet sensor and on-board signal processing to improve detection performance and false-alarm immunity.
Oil and gas facilities, fuel storage areas, diesel rooms, solvent storage rooms and chemical process areas may face flame risks that develop differently from ordinary building fires. In these environments, fire may start from fuel leakage, flammable vapor ignition, hot work, equipment failure or process-related ignition sources.
In such projects, engineers usually need to consider:
Fast open-flame detection
Wide-area monitoring
Explosion-proof equipment selection
Outdoor or harsh environment protection
Signal output to fire alarm or monitoring systems
Clear maintenance requirements for long-term operation
AT-FD02-UVIR3 is designed for open-flame detection, which makes it suitable for engineering projects where direct flame monitoring is required. Final suitability should always be confirmed according to the site hazardous area classification, project design and local regulations.
The AT-FD02-UVIR3 uses combined UV and IR flame detection. The manual lists the UV spectrum range as 185–260 nm and the IR spectrum range as 3.8–5.0 μm. This combination helps the detector evaluate flame characteristics through more than one optical signal.
For industrial applications, this is important because the working environment may include sunlight, hot surfaces, equipment operation, dust, moisture or process activity. A UV/IR flame detector is designed to provide more dependable flame identification than single-signal detection in many industrial fire detection designs.
For marketing and engineering explanation, the key message is simple:
UV detects flame radiation. IR verifies flame characteristics. Signal processing helps improve reliable flame detection in industrial environments.
Large industrial areas often require a flame detector with sufficient detection distance. According to the manual, AT-FD02-UVIR3 can detect a 0.3 m × 0.3 m n-Heptane flame up to 60 m and a 0.3 m × 0.3 m gasoline flame up to 50 m. The manual also lists 45 m detection for diesel and kerosene flame, 35 m for alcohol flame, 30 m for methane flame, 20 m for hydrogen flame and 10 m for silane flame under specified test conditions.
This makes the product suitable for projects where engineers need to monitor larger open risk areas, such as fuel handling zones, storage areas, process platforms or industrial equipment areas.
However, detection distance should not be used alone for project design. Engineers should also evaluate installation height, aiming direction, line-of-sight obstruction, flame type, environmental conditions and the protected area layout.
The manual specifies a 120° cone of vision for AT-FD02-UVIR3. This wide field of view helps the detector cover open areas when installed and aimed correctly.
For oil, gas, fuel storage and chemical risk areas, the field of view is critical. Even a long-range flame detector may not provide effective protection if the flame source is outside the detector’s viewing angle or blocked by tanks, pipes, columns, machines or building structures.
For this reason, flame detector placement should be confirmed by project layout drawings and site risk analysis. The detector should be installed where it has a clear view of the potential flame source.
AT-FD02-UVIR3 is designed for hazardous industrial environments. The manual lists the explosion-proof marking as:
Ex db IIC T6 Gb
Ex tb IIIC T80°C Db
The detector also has IP66 / IP67 ingress protection, an aluminum alloy ADC12 housing and an operating temperature range from -40°C to +70°C.
These features are important for industrial fire safety projects because equipment may be exposed to dust, moisture, outdoor conditions, temperature changes and harsh working environments.
Important note: the manual provides the explosion-proof marking, but it does not provide ATEX, IECEx, UL or FM certificate numbers in the available source file. These certificates should be marked as To be confirmed unless official certificates are provided.
A flame detector is not only a sensing device. In real projects, it must communicate alarm and fault conditions to a fire alarm panel, control panel, BMS, PLC or monitoring system.
AT-FD02-UVIR3 provides practical output interfaces. The manual lists:
+24V / GND: 24 VDC power supply input
MA: 4–20 mA current loop output
FRJK / FRJD: fire alarm relay output, normally-open contact
FLJK / FLJD: fault relay output, normally closed during normal operation and opens on fault alarm
For the 4–20 mA output, the manual lists fault alarm as ≤2 mA, normal operation as 4 mA and fire alarm as 20 mA.
This is valuable for engineering projects because different systems may require different signal types. The 4–20 mA output is useful for monitoring status, while relay outputs are practical for alarm or fault linkage.
The manual states that AT-FD02-UVIR3 supports ceiling mount and wall mount installation. The detector aiming angle should be adjusted according to the protection area and field of view. Wiring must comply with relevant standards, and cable glands should be secured where applicable.
For engineering use, the following points should be considered:
Install the detector with a clear line of sight to the protected risk area.
Avoid physical obstruction from pipes, tanks, platforms, columns or equipment.
Aim the detector according to the 120° cone of vision.
Confirm the detection distance according to the expected flame risk and site layout.
Use trained personnel for installation and commissioning.
Disconnect power before wiring.
Check external wiring for open-circuit or short-circuit before energizing.
Use cable with cross-sectional area of at least 1.0 mm², as required by the manual.
Strip approximately 6 mm of insulation at the wire end before termination.
These installation points help reduce wiring errors, poor connections and incorrect detector positioning.
Before testing, the manual requires responsible personnel to be notified and interlocks or logic outputs for the protected area/system to be disabled to avoid unwanted actions. After installation, the detector should be powered up for initialization. The green indicator flashes for approximately 50 seconds and then turns solid, indicating normal operation.
During commissioning, engineers should check:
Power supply voltage
Correct terminal wiring
4–20 mA output status
Fire alarm relay output
Fault relay output
Detector indicator status
Detector aiming direction
System alarm response
If no indicators are lit, the manual recommends checking wiring continuity and power supply, or returning the unit for service. The detector has no user-serviceable internal components, and unauthorized adjustment may affect performance or damage the device.
For optical flame detectors, the condition of the optical window is important. Dust, oil or contamination may affect detection performance.
The manual recommends periodic inspection and maintenance according to site requirements and relevant standards. At least once per year, the optical window should be cleaned and a functional test should be performed. Dust can be removed with a clean soft cloth or compressed air. If oil contamination is present, the optical window should be wiped with alcohol and a lint-free cloth. Hard objects should not be used because they may scratch the window.
For oil, gas, fuel storage and chemical areas, this maintenance point is especially important because equipment may be exposed to dust, oil mist, vapor residue or outdoor contamination.
Based on the explosion-proof marking, long detection distance, UV/IR detection method and industrial environmental protection, AT-FD02-UVIR3 can be considered for flame detection projects in areas such as:
Oil and gas facilities
Fuel storage areas
Fuel transfer stations
Chemical process areas
Solvent storage rooms
Paint rooms
Diesel generator rooms
Industrial process zones
Hazardous material handling areas
Final selection should be confirmed according to actual fire risk, hazardous area classification, installation environment, detector viewing direction, local standards and project requirements.
AT-FD02-UVIR3 is an ANWETECH explosion-proof UV/IR3 flame detector designed for open-flame detection in industrial environments.
According to the manual, the detector can detect a 0.3 m × 0.3 m n-Heptane flame up to 60 m and a 0.3 m × 0.3 m gasoline flame up to 50 m under specified test conditions.
The detector has a 120° cone of vision.
It supports 4–20 mA current loop output, fire alarm relay output and fault relay output.
Yes. The 4–20 mA output and relay outputs can be used for integration with compatible fire alarm panels, control panels or monitoring systems according to project design.
The manual lists the marking as Ex db IIC T6 Gb / Ex tb IIIC T80°C Db.
The manual recommends cleaning the optical window and performing a functional test at least once per year, or according to site requirements.
