PIR sensor uses for flame detection

Other Hardware Sensors
1

Hello everybody :slight_smile:
I'm looking for a flame sensor, in order to ( in the beginning..) detect a candle flame

I have done some researchs, and the first interesting thing was :

Sensor 1

and his brother upgraded Sensor 2

The actual problem of this sensor is the short range detection : about 100cm max

But I also see this kind of sensor : The range of detection is up to 7m !
PIR

I know flames can be detect by UV or IR sensors, so, why not?

I don't know if they correspond to my project
Here is my question : What do you recommend?
Thank you in advance

2

Trinity College sponsors an annual robot firefighter contest. There are lots of good ideas available for how to detect flames.

3

The HC-SR501 sensor you link to with the claimed range of 7 metres is the type designed to detect a large low temperature heat-source (human) moving against a lower temperature background. It may not be so effective on a small high-temp source like your candle- the only way to know is to buy one and do some tests.

I do know from personal experience that IR LED based sensors such as your first two are effective at detecting the orange flame of a candle but are unable to detect the blue flame of a gas burner. (If anyone knows of a cheap sensor that CAN detect blue flame I'd like to hear about it)

4

rw950431:
The HC-SR501 sensor you link to with the claimed range of 7 metres is the type designed to detect a large low temperature heat-source (human) moving against a lower temperature background. It may not be so effective on a small high-temp source like your candle- the only way to know is to buy one and do some tests.

I do know from personal experience that IR LED based sensors such as your first two are effective at detecting the orange flame of a candle but are unable to detect the blue flame of a gas burner. (If anyone knows of a cheap sensor that CAN detect blue flame I'd like to hear about it)

Thank you jremington and rw950431 for your posts.

Rw : Ok, I understand all.
Finally, I'm gonna take the first one

Nice day