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MQ-8 hydrogen sensor alarm module gas sensor module



Quick Overview

Seller Name : Mod N Shields
Best Quality Wholesale Price
Cash-On-Delivery: Not Available for this product



Product Details

MQ-8 Sensor Information:
Sensitive material MQ-8 gas sensors used in clean air, low conductivity tin oxide (SnO2). When there is an environment in which the combustible gas sensor, conductivity sensor with increasing concentration of combustible gases in air increases. Use simple circuit can convert the change in conductivity of the gas concentration corresponding to the output signal. MQ-8 hydrogen gas sensor of high sensitivity monitoring of other hydrogen-containing gas is also very good. The sensor can detect a variety of hydrogen-containing gas, in particular, city gas, is a low-cost sensor suitable for a variety of applications.
Module Applications:
Suitable for home or industrial hydrogen leak monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide and other gases.
Module Features:
1, using dual-panel design, with power indicator and a TTL signal output instructions;
2, with the switching signal DO TTL And AO output analog signal output;
3, TTL output valid signal is low. When the output low signal light can be directly connected microcontroller or relay module
4, the higher the voltage, the voltage concentration analog output higher.
5, for hydrogen detection sensitivity.
6, there are four screw holes for easy positioning;
7 Product Dimensions: 32 (L) * 20 (W) * 22 (H)
8, with a long life and reliable stability
9, fast response and resume

Electrical properties:
Input voltage: DC5V Power Electric current : 150mA
DO output: TTL digital 0 and 1 0.1 and 5V
AO Output: 0.1-0.3V Relatively clean , The maximum concentration of a voltage of about 4V
reminder: After the sensor is powered, need to warm about 20S, measured data becomes stable, heat sensor is a normal phenomenon, because the internal heating wire, hot if not normal.

test program:

Function: This version of the test program supporting

Use chip: AT89S52

Crystal: 11.0592MHZ

Baud rate: 9600

Compiler Environment: Keil

statementThis procedure is used only for study and reference, please indicate the copyright and author information!

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

Description: 1, When the measured concentration greater than the set density, single-chip IO port output low

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#include // Library

#define uchar unsigned char // macro definition unsigned char

#define uint unsigned int // macro definition unsigned int


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

I / O definitions

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sbit LED = P1 ^ 0; // Define a first microcontroller P1 port That P1.0 To indicate the end

sbit DOUT = P2 ^ 0; // Define the microcontroller P2 port Chapter 1 That P2.0 The input end of the sensor

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

Delay function

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void delay () // delay procedure


uchar m, n, s;

for (m = 20; m0; m--)

for (n = 20; n0; n--)

for (s = 248; s0; s--);


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

The main function

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void main ()


while (1) // infinite loop


LED = 1; // Off P1.0 port lights

if (DOUT == 0) // When the concentration is higher than the set value, the implementation of the Con


delay (); // delay interference

When if (DOUT == 0) // determine the concentration higher than the set value, the implementation of the Con


LED = 0; // P1.0 port lights lit





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




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Additional Information

SKU CC1212130201
Cash on Delivery No

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