MQ-3B MQ-7B 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

MQ-8

$7.70

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MQ-3B MQ-7B 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

MQ-3B MQ-7B 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

$7.70

Sale price $7.70 Regular price $0.00

Color MQ-8 MQ-9 MQ-135 MQ-3B MQ-5 MQ-4 MQ-6 MQ-7 MQ-2 MQ-3 MQ-7B

Description

SPECIFICATIONS

Brand Name: SZFYDOSH

Choice: yes

Material: Mixture

Model Number: MQ

Origin: Mainland China

Output: Digital Sensor

Theory: Other

Type: Gas Sensor

Use: Gas Sensor

is_customized: Yes

semi_Choice: yes

MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135 Probe Gas sensor

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

************************************************** ****************** /

Product Introduction

The gas sensitive material used by MQ-7B carbon monoxide gas sensor is tin dioxide (Sn02) with low conductivity in clean air. The high and low temperature cycle detection method is adopted to detect carbon monoxide at low temperature (1.5V heating). The conductivity of the sensor increases with the increase of carbon monoxide gas concentration in the air. The high temperature (5.0V heating) cleans the stray gas adsorbed at low temperature. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the concentration of the gas.

The MQ-7B Carbon Monoxide gas sensor is highly sensitive to carbon monoxide and can detect a variety of carbon monoxide containing gases, making it a low-cost sensor suitable for a variety of applications.

Product Introduction

The gas-sensitive material used by the MQ-3B alcohol gas sensor is tin dioxide (SnO2), which has a low conductivity in clean air. When alcohol vapor exists in the environment of the alcohol sensor, the conductivity of the gas sensor increases with the increase of the alcohol gas concentration in the air. A simple circuit is used to convert the change in conductivity into an output signal corresponding to the concentration of the gas.

MQ-3B semiconductor alcohol sensor has high sensitivity to alcohol and can resist the interference of gasoline, smoke and water vapor. The gas sensor can detect a variety of alcohol atmospheres, making it a low-cost sensor suitable for a variety of applications