Currencies:  

5PCS xDIY tool Carbon Monoxide & Flammable Gas Sensor MQ-9

$37.88

Always Free Shipping

 TECHNICAL DATA MQ-9 GAS SENSOR

FEATURES
* High sensitivity to carbon monoxide and CH4?LPG.
* Stable and long life


APPLICATION
They are used in gas detecting equipment for carbon monoxide and CH4?LPG in family and industry or car.


SPECIFICATIONS


A. Standard work condition
Symbol
Parameter name
technical condition
Remark
Vc
circuit voltage
5V±0.1
AC or DC
VH (H)
Heating voltage (high)
5V±0.1
AC or DC
VH (L)
Heating voltage (low)
1.4V±0.1
AC or DC
RL
Load resistance
Can adjust
RH
Heating resistance
33?±5%
Room temperature
TH (H)
Heating time (high)
60±1 seconds
TH (L)
Heating time (low)
90±1 seconds
Ps
Heating consumption
Less than 340mw


b. Environment conditions
Symbol
Parameters
Technical conditions
Remark
Tao
Using temperature
-20?…+50?
Tas
Storage temperature
-20?…+50?
Advice using scope
RH
Relative humidity
Less than 95%RH
O2
Oxygen concentration
21%(stand condition)
the oxygen concentration can
affect the sensitivity
characteristic
Minimum value is over 2%


c. Sensitivity characteristic
symbol
Parameters
Technical parameters
Remark
Rs
Surface resistance
Of sensitive body
2-20k
In 100ppm
Carbon Monoxide
?(300/100ppm)
Concentration slope rate
Less than 0.5
Rs (300ppm)/Rs(100ppm)
Temperature -20?±2? relative humidity 65%±5% RL:10K?±5%
Standard working
condition
Vc:5V±0.1V VH:5V±0.1V VH:1.4V±0.1V
Preheat time
No less than 48 hours
Detecting range:20ppm-2000ppm carbon monoxide
500ppm-10000ppm CH4
500ppm-10000ppm LPG

D. Structure and configuration, basic measuring circuit
Structure and configuration of MQ-9 gas sensor is shown as Fig. 1 (Configuration A or B), sensor composed by micro AL2O3 ceramic tube, Tin Dioxide (SnO2) sensitive layer, measuring electrode and heater are fixed into a crust made by plastic and stainless steel net. The heater provides necessary work conditions for work of sensitive components. The enveloped MQ-9 have 6 pins ,4 of them are used to fetch signals, and other 2 are used for providing heating current.


Add to Cart:

  • Model: SH460352
  • Shipping Weight: 50 gram