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MQ-9 Schematic ( PDF Datasheet ) - Henan Hanwei Electronics
| Teilenummer | MQ-9 |
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| Beschreibung | Semiconductor Sensor | |
| Hersteller | Henan Hanwei Electronics | |
| Logo |  |
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Gesamt 3 Seiten 
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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| Seiten | Gesamt 3 Seiten | |
| PDF Download | [ MQ-9 Schematic.PDF ] | |
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