MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Detection Smoke methane liquefied Gas Sensor Module

(13 customer reviews)

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MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Detection Smoke methane liquefied Gas Sensor Module for Arduino Starter DIY Kit

 

The gas-sensing material used in the MQ-2 gas sensor is tin oxide (SnO2) with a low conductivity in clean air. When there is a combustible gas in the environment in which the sensor is present, the conductivity of the sensor increases as the concentration of combustible gas in the air increases. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit. The MQ-2 gas sensor is highly sensitive to liquefied gas, propane and hydrogen, and is ideal for the detection of natural gas and other combustible vapors. This sensor can detect a variety of flammable gases, is a variety of applications for low-cost sensors.
Module Application:
Can be used for home and factory gas leak monitoring device, suitable for liquefied gas, butane, propane, methane, smoke and other detection;
Module Features:
1, the use of high-quality double-panel design, with power indicator and TTL signal output instructions;
2, with DO switch signal (TTL) output and AO analog signal output;
3, TTL output valid signal is low. (When the output low signal lights, can be directly connected to the microcontroller or relay module)
4, the analog output voltage with the higher the higher the voltage the higher the voltage.
5, the liquefied petroleum gas, natural gas, city gas, smoke has a better sensitivity.
6, there are four screw holes to facilitate positioning;
7, product dimensions: 32 (L) * 20 (W) * 22 (H)
8, with long service life and reliable stability
9, fast response to recovery features
Electrical performance:
Input voltage: DC5V Power consumption (current): 150mA
DO output: TTL digital 0 and 1 (0.1 and 5V)
AO output: 0.1-0.3V (relatively no pollution), the maximum concentration of about 4V voltage
Special reminder: the sensor power, the need to preheat 20S or so, the measured data was stable, the sensor fever is a normal phenomenon, because the internal electric wire, if the hot is not normal.
Wiring:
1, VCC: then the power supply positive (5V)
2, GND: Connect the power supply negative
3, DO: TTL switch signal output
4, AO: analog signal output
test program:
Implementation of the function: This version of supporting test procedures
Use the chip: AT89S52
Crystal: 11.0592MHZ
Baud rate: 9600
Compiler environment: Keil
【Statement】 This procedure is only used for learning and reference, please specify the copyright and author information!
************************************************** ******************* /
/ ************************************************* *******************
Description: 1, when the measured concentration is greater than the set concentration, the microcontroller IO output low
************************************************** ******************* /
# Include // library file
#define uchar unsigned char // macro defines unsigned character
#define uint unsigned int // macro defines unsigned integer
/ ************************************************* *******************
I / O definition
************************************************** ******************* /
Sbit LED = P1 ^ 0; / / define the first bit of P1 port P1 (P1.0) as the indicator
Sbit DOUT = P2 ^ 0; / / define the first bit of the microcontroller P2 port (ie P2.0) for the sensor input
/ ************************************************* *******************
Delay function
************************************************** ******************* /
Void delay () // delay program
{
Uchar m, n, s;
For (m = 20; m> 0; m–)
For (n = 20; n> 0; n–)
For (s = 248; s> 0; s–);
}
/ ************************************************* *******************
Main function
************************************************** ******************* /
Void main ()
{
While (1) // infinite loop
{
LED = 1; // off P1.0 port light
If (DOUT == 0) // When the concentration is higher than the set value, execute the condition function
{
Delay (); / / delay anti-interference
If (DOUT == 0) // When the concentration is higher than the set value, execute the condition function
{
LED = 0; // light P1.0 port light
}
}
}
}
/ ************************************************* *******************
End
************************************************** ****************** /

 

 

 

 

 

 

Brand Name

SZYTF

Type

Gas Sensor

Output

Analog Sensor

Model Number

MQ

Material

Polymer

13 reviews for MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Detection Smoke methane liquefied Gas Sensor Module

  1. Customer

    Great store,highly recommended,FAST shipping,great communication,Thank you

  2. M***l

    3 weeks to NL

  3. G***z

    Alles gut .. danke

  4. N***v

    Норм

  5. N***v

    good

  6. A***u

    thanks!

  7. D***o

    llegó en exelentes condiciones. aún no probado

  8. Customer

    very fast arrive

  9. R***u

    I did not received the product but money back

  10. Customer

    producto llego en muy buen tiempo, solo el embalaje debio venir con bolsa de burbuja . aun no probados, recomiendo vendedor.

  11. D***d

    thanks

  12. P***c

    zamówiono 29.11, wysłano 30.11, dostarczono 07.01. Wszystko zgodnie z opisem. Nie testowane jeszcze

  13. M***A

    very fast shipping, very happy

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