MQ-Q2 Smoke sensor

Sensor Type

Semiconductor

Standard Encapsulation

Bakelite (Black Bakelite)

Detection Gas

Combustible gas and smoke

Concentration

300-10000ppm
(Combustible gas)

Circuit

Loop Voltage

V_c

≤24V  DC

Heater Voltage

V_H

5.0V±0.2V ACorDC

Load Resistance

R_L

Adjustable

Character

Heater Resistance

R_H

31Ω±3Ω（Room Tem.）

Heater consumption

P_H

≤900mW

Sensing Resistance

R_s

2KΩ-20KΩ(in 2000ppm C₃H₈ )

Sensitivity

S

 Rs(in air)/Rs(1000ppm isobutane)≥5

Slope

       α

≤0.6(R_5000ppm/R_3000ppm CH₄)

Condition

Tem.  Humidity

20℃±2℃;65%±5%RH

Standard test circuit

 Vc:5.0V±0.1V；

            V_H: 5.0V±0.1V

Preheat time

Over 48 hours