I am making a device that will tell you if you have left your stove on. I have tried a flame sensor so far but the problem is that I can not find one that will work with a blue flame. Can someone please send me a link or help me to get the current one to work?
thx
It is possible that this might work for you:-
Can you add a link to "a flame sensor"?
Can you put a heat sensor near the flame? Like thermo couple?
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How may have you tried and what type were they?
I agree with @build_1971 that a thermocouple will work for your application. Assuming you don’t need an immediate response, the thermocouple can be placed some distance from the flame and still accurately detect heat.
However, there are a couple of considerations for determining the flame's status:
Detecting the "On" State:
The thermocouple generates a voltage proportional to the heat. You’ll need to define a threshold voltage that corresponds to the presence of the flame. For example, if the voltage exceeds a certain value, you can consider the flame to be "on."
Detecting the "Off" State:
To determine when the flame is "off," monitor the thermocouple's output. When the voltage drops below the threshold, you can conclude that the flame is no longer present. However, keep in mind that the thermocouple’s response may have a slight delay as it cools down.
Additional Considerations:
Flame Failure Detection:
If safety is a concern (e.g., gas systems), you may need a secondary system to detect when the flame unexpectedly goes out, triggering an immediate response (e.g., shutting off the gas supply).
Ambient Heat:
Ensure that the thermocouple is positioned to measure heat directly from the flame and not from nearby heat sources to avoid false readings.