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DIY Kit MQ-2 Smoke Sensor Detector Natural Gas Alarm Electronic Components Suite

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$5.69 $3.98
Quantity5+10+
Price$4.19$3.99
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Tested by ICStation's Outstanding Partner Stefano91ste:
(The language in the video is English)
 
 
Function:
    With the continuous improvement of people's living standards, gas and natural gas have entered thousands of households, bringing convenience to everyone, but also there are many safety hazards. Gas poisoning accidents also occur from time to time.
 
Therefore, we must regularly check for leaks. The gas detection and alarm circuit is composed of components such as gas sensor MQ5, voltage comparator LM393 and voice chip C002. It can detect the combustible gas in the air and automatically sound and light alarm.
 
Circuit principle:
    The gas sensing material used in the MQ-2 gas sensor is tin dioxide (Sn02) with low conductivity in clean air. When there is flammable gas in the environment where the sensor is located, the conductivity of the sensor varies with the concentration of flammable gas in the air. Increased and increased, it is suitable for household or industrial detection devices for gas, natural gas and liquefied gas, and has excellent resistance to ethanol and smoke interference.
 
  It is an economical sensor suitable for a variety of applications. C002 is a three-tone optional alarm sound voice chip, which internally stores the sound of police car 110, fire alarm 119 and ambulance 120. The external oscillating resistor is lOOK ~ 240Kohm (the higher the resistance, the slower the sound speed), it can be driven after power-on.
 
 The buzzer sounds. 1 pin grounding, 2 pin output, 3 pin selection sound terminal, 4 feet connected to the positive pole of the power supply, 5 and 6 feet connected to the oscillation resistor. The gas detection and alarm circuit uses the alarm sound of the fire alarm 119, and its working voltage is generally 2.4 to 3.6V.
 
Quantity5+10+
Price$4.19$3.99
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1. Hongkong / Sinapore Airmail

(1) Due to the high risk of package lost recently, we have to stop using the free shipping way these days. Hope for your kind understanding! And the $3 is for tracking number and delivery insurance ^0^ Enjoy order from us. 

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(2) Shipping time 
Shipping time is 7-20 business days to most of countries; please view below table for exactly shipping time to your location. 

7-15 working days to: Most of Asia countries
10-16 working days to: USA , Canada , Australia , UK , Most of Europe countries
13-20 working days to: Germany , Russia
18-25 working days to: France , Italy , Spain , South Africa
20-45 working days to: Brazil , Most of South America countries

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Total price of the order >= 200USD or Total weight of the order >= 2.2KG

When the order meets to one of the above requirement, it will be shipped for FREE via EMS/DHL/UPS Express to below country. 
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Oceania: Australia , New Zealand , Papua New Guinea 
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(2) Shipping Time
Shipping time is 3-5 working day (about 1 week) to most of countries. 

Because the package would be returned to the sender if it had not been signed by the receiver in 2-3 day (DHL) or 1 week (EMS,) or 2 weeks (Registered Email), please pay attention to the arriving time of the package. 

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3. Note
1) Delivery Time of mixed orders with items in different Shipping Status should be calculated using the longest estimate times listed. 
2) Chinese Holiday Reminder: During annual Chinese holidays, services from certain suppliers and carriers may be affected, and delivery for orders placed around the following times may be delayed by 3 - 7 days: Chinese New Year; Chinese National Day,etc. 
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DIY Kit MQ-2 Smoke Sensor Detector Natural Gas Alarm Electronic Components Suite
$3.98
$5.69
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