Fire alarm using LM35DZ instead of a thermistor

[KhaledOsmani]

Hello,

Can I use LM35DZ, instead of TH1, in the attached circuit?

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Here is the circuit:

 

[esp1]

hi K,
Sorry No, you cannot directly replace the Therm with a LM35
The thermistor is resistive device the LM35 is a 'voltage' generator, 10mV/C
E

EDIT:
I would not recommend a 'heat' sensor for a fire alarm circuit, most deaths in fires are due to smoke inhalation, long before any significant rise in temperature... IMO a Smoke detector is the way to go. :!:

 

[KhaledOsmani]

Thank you esp1, is there any equivalent I can replace with?