Pre-emptive Smoke Sensor query

[slychiu]

If the smoke sensor resets itself after the smoke clears, and new smoke comes in it will trigger the smoke alarm again

If the smoke does not clear and the sensor remains triggered, it will not trigger an alarm, again after ithe alarm has been disarmed
Only a retriigger will cause a new alarm

I suggest you use the latched mode to prevent a recurring alarm. The smoke alarm will not activate again until ythre detector is reset by cycling power using S12V programmable output