MQ-2 MQ-3 MQ-4 MQ-5 MQ-6 MQ-7 MQ-8 MQ-9 MQ-135
MQ-2 Sensor
Gas: smoke
Detection range: 300 to 10000ppmm
Characteristic gas: 1000ppmm isobutane
Sensitivity: R in air/Rin typical gasge5
Sensitive body resistance: 1KOmega to 20KOmega in 50ppm toluene
Response time: le10s
Recovery time: le30s
Heating resistance: 31 Omega plusmn 3 Omega
Heating current: le180mA
Heating voltage: 5.0V plusmn 0.2V
Heating power: le900mW
Measuring voltage: le24V
Working conditions Ambient temperature: -20 deg C ~ +55 deg C
Humidity: le95% RH
Environmental oxygen content: 21%
Storage conditions Temperature: -20 deg C ~ +70 deg C
Humidity: le70%RH
Applications: Household and factory gas leak monitoring devices suitable for detection of liquefied gases, butane, propane, methane, alcohol, hydrogen, fumes, etc.
MQ-3 Sensor
Gas: Alcohol (ethanol)
Detection range: 10 ~ 1000ppm alcohol
Characteristic gas: 125ppm alcohol
Sensitivity: R in air/Rin typical gasge5
Sensitive body resistance: 1 ~ 20KOmega in air
Response time: le10s (70% Response)
Recovery time: le30s (70% Response)
Heating resistance: 31 Omega plusmn 3 Omega
Heating current: le180mA
Heating voltage: 5.0V plusmn 0.2V
Heating power: le900mW
Measuring voltage: le24V
Ambient temperature: -20 deg C ~ +55 deg C
Humidity: le95% RH
Environmental oxygen content: 21%
Storage temperature: -20 deg C ~ +70 deg C
Storage humidity: le70%RH
MQ-7 Sensor
Product type : Semiconductor gas sensor
Detection gas: carbon monoxide
Detection concentration: 10-1000ppmCO
Loop voltage: le10V DC
Heating voltage (VH): 5.0V plusmn 0.2V ACorDC (high)
1.5V plusmn 0.1VACorDC (low)
Heating time (TL): 60plusmn1S (high) 90plusmn1S (low)
Load resistance (RL): adjustable
Heating resistance (RH): 31Omega plusmn 3Omega (room temperature)
Heating power consumption (PH): le350mW
Sensitive surface resistance (Rs): 2KOmega-20KOmega (in100ppmCO)
Sensitivity (S); Rs (in air) / Rs (100ppmCO) ge 5
Concentration slope (alpha): le 0.6 (R300ppm/R100ppmCO)
Temperature, humidity: 20 deg C plusmn 2 deg C; 65% plusmn 5% RH
Standard test circuit: Vc: 5.0V plusmn 0.1V; VH (high): 5.0V plusmn 0.1V; VH (low): 1.5V plusmn 0.1V
Warm-up time: no less than 48 hours
MQ135 Sensor
Product Type: Semiconductor Gas Sensor
Detection gas: ammonia, sulfide, benzene vapor
Detection concentration: 10-1000ppm (ammonia, toluene, hydrogen)
Loop voltage (Vc): le24V DC
Heating voltage (VH): 5.0V plusmn 0.2V ACorDC
Load resistance (RL): adjustable
Heating resistance (RH): 31 Omega plusmn 3 Omega (room temperature)
Heating power consumption (PH): le900mW
Sensitive surface resistance (Rs): 2KOmega-20KOmega (in 100ppm NH3)
Sensitivity (S): Rs (in air) / Rs (100ppm NH3) ge 5
Concentration slope (alpha): le 0.6 (R100ppm/R50ppmNH3)
Temperature, humidity: 20 deg C plusmn 2 deg C; 65% plusmn 5% RH
Standard test circuit: Vc: 5.0V plusmn 0.1V; VH: 5.0V plusmn 0.1V
Warm-up time: no less than 48 hours
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