MQ-Q9 CO and gas sensor

Sensor Type

Semiconductor

Standard Encapsulation

Bakelite

Detection Gas

CO and combustible gas

Concentration

10-1000ppm CO

100-10000ppm combustible gas

Circuit

Loop Voltage

V_c

≤10V DC

Heater Voltage

V_H

 5.0V±0.2V ACorDC（High）

1.5V±0.1V ACorDC（Low）

Heater Time

T_L

60±1S（High）90±1S（Low）

Load Resistance

R_L

Adjustable

Character

Heater Resistance

R_H

31Ω±3Ω（Room Tem.）

Heater consumption

P_H

≤350mW

Sensing Resistance

R_s

2KΩ-20KΩ(in 100ppm CO )

Sensitivity

S

Rs(in air)/Rs(100ppm CO)≥5

Slope

       α

≤0.6(R_300ppm/R_100ppm CO)

Condition

Tem. Humidity

20℃±2℃; 65%±5%RH

Standard test circuit

Vc:  5.0V±0.1V;

V_H（High）: 5.0V±0.1V； 

V_H（Low）: 1.5V±0.1V

Preheat time

Over 48 hours