Flame Detection Using Ionization Method.

[virgo_l]

I want to detect a flame in a gaz burner using the flame ionization method.
There seems to be very less information about this on Internet on how to implemetn it practically.
I got to know working principe for the method here http://articles.jimtrade.com/1/20.htm

There are various Flame Ionization Detector (FID ) sensors available but they cost a bomb and are used for Gas chromatography.  For my application I don't want to do any kind of Gas Chromotography , I just want to know the presence/absence of flame. I tried other optical techniques ( using photodiode/light sensor ) but they are not that useful and the sensor is becoming hot. As the device has to be small and I can't put the sensor far away.

So if anyone here has idea please advice.

[SeanB]

Use a spark plug?  Or use an ignitor probe for a furnace in the flame, and detect the current flow from the probe to the jet body.

[abbtech]

Hi Vergo,

Many moons ago I used to install and service DetTronics flame detection systems. They are quite expensive but I am sure you could find a used one on eBay from time to time for a reasonable price.
http://www.detronics.com

As an alternative I am thinking that with some effort you could build a simple version of the system which basically looks for the frequency of the flickering flame in the IR spectrum.
http://www.desusystems.com/files/documents/FREQUENTLY%20ASKED%20QUESTIONS%20ABOUT%20FLAME%20DETECTION.pdf

[amyk]

and the sensor is becoming hot

Then why not use a thermocouple?

[dda]

Thermocouples would be easy but might be a little slow to respond. A CO2sensor could be put inline with exhaust gases.