MQ-9 데이터시트 PDF

MQ-9 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.

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Henan Hanwei Electronics Co., Ltd

www.hwsensor.com

MQ-9 Semiconductor Sensor for CO/Combustible Gas

Sensitive material of MQ-9 gas sensor is SnO2, 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

* Good sensitivity to CO/Combustible gas

* High sensitivity to Methane, Propane and CO

* Long life and low cost

* Simple drive circuit

Configuration

Application

* Domestic gas leakage detector

* Industrial gas detector

* Portable gas detector

Technical Data

Basic test loop

Model No.

Sensor Type

Standard Encapsulation

Detection Gas

Concentration

Loop Voltage Vc

Circuit

Heater Voltage VH

Heater Time

TL

Load Resistance RL

Heater Resistance

Character

Heater

consumption

Sensing

Resistance

Sensitivity

RH

PH

Rs

S

Slope

α

Tem. Humidity

Condition

Standard test circuit

Preheat time

MQ-9

Semiconductor

Bakelite

CO and combustible gas

10-1000ppm CO

100-10000ppm combustible gas

≤10V DC

5.0V±0.2V ACorDC（High）

1.5V±0.1V ACorDC（Low）

60±1S（High）90±1S（Low）

Adjustable

31Ω±3Ω（Room Tem.）

≤350mW

2KΩ-20KΩ(in 100ppm CO )

Rs(in air)/Rs(100ppm CO)≥5

≤0.6(R300ppm/R100ppm CO)

20℃±2℃; 65%±5%RH

Vc:5.0V±0.1V;

VH（High）: 5.0V±0.1V；

VH（Low）: 1.5V±0.1V

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

V VR

RL

VH

GND

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

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

performance of sensor. In order to

make the sensor with better

Email: sales@hwsensor.com

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