₹159 – ₹209
- Product Code: LGSK029
- Make in India
- Technical Support: upto 10mins Video support
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Shipping DetailsUsually delivered in 3-5 days International Shipping Available
This device works on the principle of IR sensors. Fires contains large amount of Infrared (IR) signals. In case the fire is detected, the buzzer beeps and led gets turned on.
The resistance of IR sensors decreases, as the IR rays fall on them. It is clear from the given circuit diagram that if the resistance of IR sensor decreases, the voltage V3 will increase as it forms a resistance divider network. Hence as soon as the fire is detected, the v3 increases and hence the transistor gets turned on and buzzer, led also get turned on.
- Dimensions (cm) L x W x H : 20 x 15 x 5
- Weight (gm) : 150