Originally Posted by irishsaint
How would emergency extinguishers differentiate between smoke from sticky brakes and smoke from a real fire?
I'm not sure in this case, but there are different sensors available to deal with different situations.
Common or garden type smoke detectors aren't particularly useful in kitchens as even the smoke from a (nont on fire) toaster could trigger them. In such instances, heat detectors are more useful, they don't get distracted by the modest temperature of cooking (80-250 degrees C), but do detect your kitchen on fire (700-1000 degrees C).
There are other devices like flash detectors and the bulbs used in water sprinklers and I imagine many others.