Sensors
Fire / Flame Sensor Module
৳130
Infrared flame detector that responds to the 760–1100 nm light a flame emits, with both an analog level and an adjustable digital trigger.
It looks for the specific infrared signature of fire rather than heat, so it reacts far faster than a temperature sensor. Sensitivity is set with the onboard potentiometer.
What you can build
- Fire alarm and safety cut-off projects
- Firefighting robots that steer toward a flame
- Gas stove and burner monitoring
Not sure it will work? Test your circuit free in Tekko Sim — on your phone, in Bangla or English.
| Category | Sensors |
| Model no. | IR flame |
| Availability | In stock |
| In stock | 5 pcs |
| Delivery | Cash on Delivery, nationwide Bangladesh |
| Detects | infrared in the 760–1100 nm band |
| Operating Voltage | 3.3–5V DC |
| Outputs | analog level plus an adjustable digital trigger |
| Comparator | LM393 with an onboard potentiometer |
| Detection Angle | roughly 60 degrees |
| Detection Distance | shorter as the flame gets smaller; a candle is detected at close range |
Questions about the Fire / Flame Sensor Module
Does it detect heat or actual flame?
Flame. It responds to the infrared light a fire emits, not to air temperature, so it reacts within moments of ignition rather than waiting for the room to warm up.
Why does it trigger in sunlight?
Daylight contains plenty of infrared in the same band. Shield the sensor from direct sun, point it away from windows, or turn the sensitivity down with the potentiometer.
How far away can it detect a fire?
It depends entirely on the size of the flame. A candle is only detected at close range while a larger fire registers much further out. Treat it as a short-range detector and place it accordingly.
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