Editorial Technical Reference

Flame Detector

This page explains how Flame Detector is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A safety device that monitors the presence or absence of a flame in a burner system.

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Flame Detector

Definition
A flame detector is a critical safety component used in industrial burner systems to continuously monitor the combustion process and detect the presence or absence of a flame. Its primary function is to provide a signal to the burner management system, enabling safe shutdown procedures if flame failure is detected. This prevents the accumulation of unburned fuel, which could lead to explosions or other hazardous conditions. The detector operates by sensing specific characteristics of a flame, typically using ultraviolet (UV) or infrared (IR) radiation detection. UV detectors respond to high-energy UV radiation emitted by flames, while IR detectors sense specific infrared wavelengths produced by combustion. When the detector senses the appropriate radiation signature, it sends a signal confirming flame presence. If the radiation drops below a threshold or disappears, the detector signals flame failure. The device is housed in a stainless steel enclosure (grade 316L per ASTM A240) for corrosion resistance, with a quartz glass lens for optical transmission. It includes UV/IR sensor elements and electronic circuitry for signal processing. Key parameters include a detection distance of 20–60 meters for kerosene/gas flames at 1 Hz flicker, a response time of ≤3 seconds (per EN 54-10), a spectral range of 4.2–4.7 µm for hydrocarbon flames, a supply voltage of 18–32 V DC (nominal 24 V DC), power consumption ≤5 W at 24 V DC, operating temperature range -40 to 85 °C, storage temperature range -55 to 105 °C, ingress protection IP66–IP67 (per IEC 60529), weight 1.2–2.5 kg depending on housing and options, field of view 90–120 degrees, and an analog 4–20 mA output signal (3-wire). These values are directory reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. The detector is designed for continuous operation in industrial environments and is suitable for use in burner management systems for boilers, furnaces, and other combustion equipment.
Working Principle
Flame detectors operate by sensing specific characteristics of a flame, typically using ultraviolet (UV) or infrared (IR) radiation detection. UV detectors respond to the high-energy UV radiation emitted by flames, while IR detectors sense the specific infrared wavelengths produced by combustion. When the detector senses the appropriate radiation signature, it sends a signal confirming flame presence. If the radiation drops below a threshold or disappears, the detector signals flame failure.
Common Materials
Stainless steel housing, Quartz glass lens, UV/IR sensor element, Electronic circuitry
Technical Parameters
ParameterTypical rangeNotes & selection driver
Detection Distance20–60 mFor kerosene/gas flames at 1 Hz flicker
Response Time≤3 sTime to alarm after flame exposureEN 54-10
Spectral Range4.2–4.7 µmIR band for hydrocarbon flames
Supply Voltage18–32 V DCNominal 24 V DC
Power Consumption≤5 WAt 24 V DC
Operating Temperature-40–85 °CContinuous operation
Storage Temperature-55–105 °CNon-operating
Ingress ProtectionIP66–IP67Dust-tight and protected against powerful water jetsIEC 60529
Housing Material316LStainless steel for corrosive environmentsASTM A240
Weight1.2–2.5 kgDepending on housing and options
Field of View90–120 °Cone angle for detection
Output Signal4–20 mAAnalog current loop, 3-wire

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Sensor Head
    Detects UV/IR radiation from the flame and converts it to electrical signals
    Material: Stainless steel with quartz window
  • Amplifier Circuit
    Amplifies weak sensor signals for processing
    Material: Electronic components on PCB
  • Signal Processor
    Analyzes sensor data to distinguish flame radiation from background radiation
    Material: Microcontroller and supporting electronics
  • Output Relay
    Provides contact closure or electronic signal to indicate flame status
    Material: Electromechanical or solid-state relay
  • Mounting Bracket Part
    Secures the detector in proper position relative to the burner
    Material: Stainless steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 1.5 bar (typical), up to 10 bar with special housing
other spec: Response time: <5 seconds, Detection range: 0.5-30 meters, Viewing angle: 90-120 degrees
temperature: -40°C to +85°C (operating), up to +120°C (short-term exposure)
Media Compatibility
✓ Natural gas combustion systems ✓ Oil-fired burners ✓ Industrial furnace flames
Unsuitable: High-pressure water mist or steam environments (interferes with UV/IR detection)
Sizing Data Required
  • Burner flame size and intensity
  • Required detection distance
  • Ambient light/radiation interference level

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Optical contamination
Cause: Accumulation of dust, dirt, oil mist, or condensation on the lens or optical window, obstructing the detector's ability to sense flame radiation (UV/IR).
Electronic component degradation
Cause: Exposure to extreme temperatures, voltage spikes, or prolonged vibration leading to failure of sensitive circuits, such as the photodiode, amplifier, or microprocessor.
Maintenance Indicators
  • Frequent false alarms or failure to alarm during a known flame test, indicating compromised sensitivity.
  • Visible physical damage, such as a cracked lens, moisture ingress, or corrosion on the housing or connectors.
Engineering Tips
  • Implement regular cleaning and inspection schedules for the optical surfaces, using appropriate non-abrasive cleaners, and ensure the detector is installed in a location with minimal airborne contaminants.
  • Use surge protection devices on the power and signal lines, and ensure proper mounting to minimize vibration, while performing periodic functional testing with a certified flame simulator.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 7240-10:2012 (Fire detection and alarm systems - Flame detectors) ANSI/UL 268A (Standard for Smoke Detectors for Fire Alarm Systems - Flame Detectors) EN 54-10:2002 (Fire detection and fire alarm systems - Flame detectors)

Quoted from the published standard.

Manufacturing Precision
  • Response Time: +/- 0.5 seconds
  • Spectral Sensitivity Range: +/- 5% of specified wavelength
Quality Inspection
  • Functional Response Test (to calibrated flame source)
  • Environmental Durability Test (vibration, temperature, humidity)

Manufacturers of Flame Detector

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Hanwei Electronics Group Corporation
Beijing, CN
Also makes: Gas Panel, Alarm System, Gas Detection System and 3 more
Listed on the company's own website · profile compiled by CNFX from public sources

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

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Frequently Asked Questions

What is the typical response time of this flame detector?

The response time is ≤3 seconds after flame exposure, as per EN 54-10. This is a reference value; verify the exact response time for your specific model and application with the manufacturer.

What is the detection distance for kerosene or gas flames?

The detection distance is 20–60 meters for kerosene/gas flames at 1 Hz flicker. This range depends on flame characteristics and environmental conditions; confirm with the supplier for your installation.

What output signal does this flame detector provide?

It provides an analog 4–20 mA current loop output (3-wire). This signal is used to communicate flame presence or failure to the burner management system.

What is the ingress protection rating?

The ingress protection is IP66–IP67 per IEC 60529, meaning it is dust-tight and protected against powerful water jets. Verify the exact rating for your housing option.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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