Datasheet > MQ-9

MQ-9

更新时间： 2024-11-04 01:24:59

品牌	Logo	应用领域
汉威 - HANWEI		/
页数	文件大小	规格书
3页	181K
描述
Semiconductor Sensor for CO/Combustible Gas

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中文翻译

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MQ-9 数据手册

Henan Hanwei Electronics Co., Ltd

www.hwsensor.com

MQ-9 Semiconductor Sensor for CO/Combustible Gas

Sensitive material of MQ-9 gas sensor is SnO_2,which with lower conductivity in clean air. It make

detection by method of cycle high and low temperature, and detect CO when low temperature (heated

by 1.5V). The sensor’s conductivity is more higher along with the gas concentration rising. When high

temperature (heated by 5.0V), it detects Methane, Propane etc combustible gas and cleans the other

gases adsorbed under low temperature. Please use simple electrocircuit, Convert change of conductivity

to correspond output signal of gas concentration.

MQ-9 gas sensor has high sensitity to Carbon Monoxide, Methane and LPG. The sensor could be

used to detect different gases contains CO and combustible gases, it is with low cost and suitable for

different application.

Character

Configuration

* Good sensitivity to CO/Combustible gas

* High sensitivity to Methane, Propane and CO

* Long life and low cost

* Simple drive circuit

Application

* Domestic gas leakage detector

* Industrial gas detector

* Portable gas detector

Technical Data

Basic test loop

V_R

Model No.

Sensor Type

MQ-9

Semiconductor

Bakelite

Standard Encapsulation

Detection Gas

R_L

CO and combustible gas

V_H

10-1000ppm CO

100-10000ppm combustible gas

Concentration

Loop Voltage

V_c

V_H

T_L

≤10V DC

GND

5.0V±0.2V ACorDC（High）

1.5V±0.1V ACorDC（Low）

60±1S（High）90±1S（Low）

Adjustable

Heater Voltage

Circuit

The above is basic test circuit of the

sensor. The sensor need to be put 2

voltage, heater voltage（VH） and

test voltage（VC）. VH used to

supply certified working temperature

to the sensor, while VC used to

detect voltage (VRL) on load

Heater Time

Load Resistance R_L

Heater Resistance R_H

31Ω±3Ω（Room Tem.）

Heater

P_H

≤350mW

consumption

Sensing

Resistance

Character

R_s

2KΩ-20KΩ(in 100ppm CO )

Sensitivity

Slope

Rs(in air)/Rs(100ppm CO)≥5

≤0.6(R_300ppm/R_100ppmCO)

20℃±2℃; 65%±5%RH

resistance（RL）whom is in series

with sensor. The sensor has light

polarity, Vc need DC power. VC and

VH could use same power circuit

with precondition to assure

Tem. Humidity

Vc:5.0V±0.1V;

V_H（High）: 5.0V±0.1V；

V_H（Low）: 1.5V±0.1V

Standard test circuit

Preheat time

Condition

performance of sensor. In order to

make the sensor with better

Over 48 hours

performance, suitable RL value is needed:

Power of Sensitivity body(Ps): Ps=Vc²×Rs/(Rs+RL)²

Tel: 86-371-67169070/80

Fax: 86-371-67169090

Email: sales@hwsensor.com

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