SPECIFICATIONS

Brand Name: NONE

High-concerned chemical: None

Origin: Mainland China

MQ3:

Used for post-drink supervision and detection of motor vehicles and other risky workers and detection of ethanol vapor in other places.

Specification:

Gas: Alcohol (ethanol)
Detection range: 10 ~ 1000ppm alcohol
Characteristic gas: 125ppm alcohol
Sensitivity: R in air/Rin typical gas≥5
Sensitive body resistance: 1 ~ 20KΩ in air
Response time ≤ 10s (70% Response)
Recovery time ≤ 30s (70% Response)
Heating resistance: 31Ω±3Ω
Heating current ≤180mA
Heating voltage: 5.0V ± 0.2V
Heating power ≤900mW
Measuring voltage ≤24V

MQ2:

(Gas leak monitoring devices for homes and factories, suitable for detection of liquefied gases, butane, propane, methane, alcohol, hydrogen, fumes, etc.)

Gas: smoke
Detection range: 300 to 10000ppmm
Characteristic gas: 1000ppmm isobutane
Sensitivity: R in air/Rin typical gas≥5
Sensitive body resistance: 1KΩ to 20KΩ in 50ppm toluene
Response time: ≤10s
Recovery time: ≤30s
Heating resistance: 31Ω±3Ω
Heating current: ≤180mA
Heating voltage: 5.0V ± 0.2V
Heating power: ≤900mW
Measuring voltage: ≤24V

MQ135:

The gas sensitive material used in the MQ135 gas sensor is tin dioxide (SnO2) with lower conductivity in clean air. When there is a polluting gas in the environment where the sensor is located, the conductivity of the sensor increases as the concentration of the polluting gas in the air increases. The change in conductivity can be converted to an output signal corresponding to the gas concentration using a simple circuit.

The MQ135 gas sensor is highly sensitive to ammonia, sulfides, and benzene vapors, and is ideal for monitoring smoke and other harmful gases. This sensor detects a wide range of harmful gases and is a low-cost sensor for a wide range of applications.

Characteristics:

Good sensitivity to harmful gases over a wide range of concentrations
High sensitivity to ammonia, sulfide, benzene, etc.
Long life, low cost
Simple drive circuit

Application:

Household air pollution alarm
Industrial air pollution alarm
Portable air pollution detector

MQ5:

Gas leakage monitoring device for home and factory, suitable for detection of liquefied gas, butane, propane, methane, hydrogen, artificial gas, etc.

Features:

Wide range of detection
High sensitivity
Fast response recovery
Excellent stability
long life
Simple drive circuit
specification
Applicable gases: liquefied gas, methane, gas
Detection range: 300 ~ 10000ppm
Characteristic gas: 1000ppm isobutane
Sensitivity: R in air/R in typical gas≥5
Sensitive body resistance: 1KΩ～20KΩ in 2000ppm isobutane
Response time: ≤10s
Recovery time: ≤30s
Heating resistance: 31Ω±3Ω
Heating current: ≤180mA
Heating voltage: 5.0V ± 0.2V
Heating power: ≤900mW
Measuring voltage: ≤24V

MQ-7:

The gas sensing material used in the MQ-7 gas sensor is tin dioxide (SnO2) with lower conductivity in clean air. The low-temperature (1.5V heating) is used to detect carbon monoxide by high-temperature cycle detection method. The conductivity of the sensor increases with the increase of the concentration of carbon monoxide gas in the air, and the high-temperature (5.0V heating) cleans the stray gas adsorbed at low temperature. A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration.

The MQ-7 gas sensor is highly sensitive to carbon monoxide. This sensor detects a wide range of carbon monoxide-containing gases and is a low-cost sensor for a variety of applications.