Flame Sensor Module 1 Channel

Overview

The 1-Channel Flame Sensor Module (LM393) is a highly responsive optical detector engineered to detect open fire and infrared radiation emitted by flames within the 760nm to 1100nm wavelength spectrum. Built around an infrared photodiode coupled with an onboard LM393 voltage comparator, the module offers a wide 60-degree directional detection cone and dual output capabilities: a real-time Analog Output (AO) reflecting infrared intensity, and a clean Digital Output (DO) that triggers when infrared radiation surpasses a threshold set by its onboard potentiometer. Widely used in educational firefighting robots, autonomous fire alarm prototypes, and industrial burner monitors, it provides dependable flame detection at an accessible price point.

Key Features

• Broad Infrared Detection Range: Sensitive to flame-specific wavelengths between 760nm and 1100nm, targeting the spectral peak of open hydrocarbon and lighter flames.
• Dual Output Flexibility: Features both Digital (DO) for immediate on/off alarm interrupts and Analog (AO) for quantitative flame distance/intensity calculations.
• Wide 60-Degree Detection Cone: Directional optics allow precise spatial targeting or multi-sensor scanning on autonomous firefighting robots.
• Adjustable Threshold Potentiometer: Onboard multi-turn trimmer lets you easily tune sensitivity to filter out ambient lighting and room reflections.
• Clean LM393 Signal Driving: Delivers sharp TTL-compatible output pulses with over 15mA sink/source capability, directly driving indicator LEDs or relay inputs.
• Standard 3.3V & 5V Logic: Operates seamlessly across modern 3.3V ARM/ESP32 microcontrollers and classic 5V Arduino boards.

Technical Specifications

• Operating Voltage: 3.3V – 5.5V DC
• Detection Spectrum: 760 nm – 1100 nm
• Detection Range: 20 cm – 100 cm (scaled to flame size)
• Field of View: ~60 degrees
• Comparator Chipset: LM393
• Output Signals: Analog (AO, 0–VCC) and Digital (DO, High/Low)
• Status Indicators: Red Power LED & Green DO Trigger LED
• Mounting Hole: Standard 3mm screw hole for secure chassis fixation
• Dimensions: 32 mm × 14 mm × 7 mm
• Weight: ~5 grams

Applications & Use Cases

• Autonomous Firefighting Robots: Mounting on maze-solving mobile rovers to locate and extinguish burning candles using fan attachments.
• Smart Home Fire Alarms: Auxiliary optical fire detector triggering sound buzzers and cloud notifications ahead of smoke buildup.
• Gas Burner & Boiler Monitoring: Optical verification of pilot light presence in industrial burners and gas furnaces.
• STEM Prototyping & Competitions: Core optical sensor for student robotics competitions, RoboCup Junior, and engineering safety demos.

What's Included

• 1 × 1-Channel Flame Sensor Module (with LM393 comparator and phototransistor)

Compatibility

• Microcontrollers: 100% compatible with Arduino Uno, Nano, ESP32, ESP8266, STM32, and Raspberry Pi (via ADC or digital GPIO).
• Safety Precaution: The photodiode must be kept at a safe distance (minimum 10–20 cm) from open flames to avoid melting its plastic casing.

MOKWN Recommendation

When building a firefighting robot or automated safety system in Egypt, optical flame detection reacts far quicker than thermal or smoke sensors because light travels instantaneously. The dual analog and digital outputs on this module make coding effortless: use the digital pin for an immediate emergency shutdown interrupt, or read the analog pin to calculate how close the robot is to the fire. Order your flame sensor from MOKWN today with lightning-fast delivery across Egypt!