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 gas sensor

Introduction

Product number			MQ gas sensor
Product type			Semiconductor gas sensor
Standard package			Black wood
Detection gas			Alcohol steam
Detection concentration			0.04-4mg / Lalcohol
Standard circuit conditions	Circuit voltage	VC	≤24V DC
	Heating voltage	VH	5. 0V ± 0. 2V ACORDC
	Load Resistance	RL	Adjustable
Characteristics of Gas Sensors under Standard Test Conditions	Heating resistance	RH	31Ω±3Ω Room temperature
	Heating power consumption	PH	≤900mW
	Sensitive body surface resistance	Rs	2KΩ -20KΩ(in 0.4mg / Lalcohol )
	Sensitivity	S	Rs(in air)/Rs(0.4mg / Lalcohol )≥5
	Concentration slope	α	≤0.6 (R3oo ppm/R100 ppm alcohol )
Standard test conditions	temperature / humidity		20°C ± 2°C; 65% ± 5%RH
	Standard test circuit		Vc:5.0V ± 0.1V
	Standard test circuit		VH: 5.0V ± 0. 1V
	Warm up time		Not less than 48 hours

MQ-135

Overview

Using high-quality dual-panel design,with power indicator and TTL signal output instructions.
The switching signal having a DO (TTL) output and analog output AO.
TTL output valid signal is low. ( Low-level signal when the output light can be directly connected to the microcontroller or relay module )
Analag output voltage with the higher concentration of higher voltage
There are four screw holes for easy positioning.
Has a long life and reliable stability
Rapid response and recovery characteristic
Input voltage : DC5V Power consumption ( current ): 150mA
DO output: TTL digital 0and 1 (0.1 and 5V)
AO output :0.1-0 .3 V ( relative to pollution ), the maximum concentration of a voltage of about 4V

Application

Can be used for home and factory gas leakage monitoring devices, suitable for liquefied petroleum gas, butane, propane, methane, smoke, etc.

MQ-2

Overview

MQ-2 gas sensor sensitive material used in the clean air low conductivity tin oxide(SnO2). When there is the environment in which the combustible gas sensor,conductivity sensor with increasing concentration of combustible gases in air increases.

Using a simple circuit to convert the change in conductivity of the gas concentration corresponding to the output signal.MQ-2 gas sensor high on gas,propane,hydrogen sensitivity of detection of natural gas and other flammable vapors are also very good.This sensor can detect a variety of flammable gas,is a low-cost sensors for a variety of applications.

Gas may be used in homes and factories leakage monitoring device suitable for the detection of gas, butane,propane, methane, smoke,etc.

MQ-3

Overview

Sensitive material MQ-3 gas sensor is used in clean air low conductivity tin oxide(SnO2). When there is alcohol vapor in the environment sensor, conductivity sensor
with increasing gas concentration of alcohol in the air increases. Use simple circuit can convert the change in conductivity of the gas concentration corresponding to the output signal. High MQ-3 gas sensor sensitivity to alcohol, can resist the interference of gasoline, smoke, water vapor. The sensor can detect a variety of alcohol
concentration in the atmosphere, is a low-cost sensor suitable for a variety of applications.

Application

For on-site detection of motor vehicle drivers and other non-drinking workers, but also for detecting other places of ethanol vapor, alcohol detection range:detection range 10 ~ 1000ppm.

MQ-4

Application

Gas sensor can be used in homes and factories leakage monitoring device, suitable for the detection of liquefied petroleum gas, butane, propane, methane, smoke and the like.

MQ-5

Application

Liquefied petroleum gas, natural gas, coal gas monitoring device suitable for home or industrial. Excellent resistance to alcohol, smoke interference ability.

MQ-6

Application

Suitable for home or industrial on LPG (liquefied petroleum gas), butane, propane,LNG (liquefied natural gas) detection devices. Excellent resistance to ethanol vapor,mist interference.

MQ-7

Application

Can be used for home and factory gas leakage monitoring devices, suitable for liquefied petroleum gas, butane, propane, methane, smoke, etc.

MQ-8

Application

Suitable for home or industrial hydrogen leak monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide and other gases.

MQ-9

Application

Suitable for home or industrial hydrogen leak monitoring devices. Can not interfere with ethanol vapor, soot, carbon monoxide and other gases.

NOTTE

After the sensor is powered, need to warm about 20s, measured data becomes stable,heat sensor is normal.

Series	MQ-135, MQ-2, MQ-3, MQ-4, MQ-5, MQ-6, MQ-7, MQ-8, MQ-9

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