SPECIFICATIONS

Brand Name: keyestudio

Choice: yes

High-concerned chemical: none

Origin: Mainland China

Output: Analog Sensor

Theory: Gas Sensor Module

Type: Gas Sensor

Use: Gas Sensor

is_customized: Yes

This analog gas sensor - MQ2 is used in gas leakage detecting equipment in consumer electronics and industrial markets.

This sensor is suitable for detecting LPG, I-butane, propane, methane, alcohol, Hydrogen and smoke. It has high sensitivity and quick response.

In addition, the sensitivity can be adjusted by rotating the potentiometer.

Specification

• Power Supply: 5V

• Interface Type: Analog

• Wide detecting scope

• Quick response and High sensitivity

• Simple drive circuit

• Stable and long lifespan

This analog gas sensor - MQ3 is suitable for detecting alcohol. It can be used in a breath analyzer.

It has good selectivity because it has higher sensitivity to alcohol and lower sensitivity to Benzine.

The sensitivity can be adjusted by rotating the potentiometer.

Specification

• Power Supply: 5V

• Interface Type: Analog

• Quick response and High sensitivity

• Simple drive circuit

• Stable and long service life
  

MQ-4 can be used in household and industrial-level gas leakage detection device to detect natural gas and methane.

It is featured with wide detection range, high sensitivity, fast response and recovery time, with excellent stability, long service life and simple drive circuit.

Applicable gas: natural gas, methane

Specification

• Detection Range: 300 ~ 10000ppm

• Characteristic Gas: 5000ppm methane

• Sensitivity: R in air/R in typical gas≥5

• Resistance of Sensitive Material: 1KΩ～20KΩ in 5000ppm methane

• Response Time: ≤10s

• Recovery Time: ≤30s

• Heating Resistance: 31Ω±3Ω

• Heating Current: ≤180mA

• Heating Power: ≤900mW

• Heating Voltage: 5.0V±0.2V

• Measuring Voltage: 5V

The gas sensitive material used in MQ-5 gas sensor is SnO2, which is of lower electrical conductivity in clean air.

When there is combustible gas in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the combustible gas concentration in the air.

The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.

The sensitivity of MQ-5 gas sensor to propane, propane and methane is quite high, and the methane and propane can be well detected.
This sensor can detect a variety of combustible gases, especially natural gas, making it a low-cost sensor for a variety of applications.

Specification

• Heating Voltage (VH): AC or DC 5±0.5V

• Operating voltage: 5V

• Load Resistance (RL): 2KΩ

• Resistance in Cleaning Air (Ra): ≤4000KΩ

• Sensitivity (S=Ra/Rdg): ≥4(in 1000ppmC4H10)

• Response Time (tres): ≤ 10S

• Recovery Time (TREC): ≤ 30S

• Detection Range: 50-10000ppm

The gas sensitive material used in MQ-6 gas sensor is SnO2, which is of lower electrical conductivity in clean air.

When there is combustible gas in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the combustible gas concentration in the air.

The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.

The sensitivity of MQ-6 gas sensor to propane, butane and liquefied petroleum gas is quite high, and the natural gas can also be well detected.
This sensor can detect a variety of combustible gases, making it a low-cost sensor for a variety of applications.

Specification

• Product model: MQ-6

• Target gas: liquefied gas, iso-butane, propane, LPG

• Detectable concentration: 300-10000ppm (propane, butane and liquefied gas)

• Operating voltage: 5V

• Heating voltage: VH 5.0V±0.2V ACorDC

• Load resistance: RL adjustable

• Heating resistance: RH 31Ω±3Ω(Room temperature)

• Heating power: ≤900mW

• Concentration slope: α ≤0.6(R2000ppm/R1000ppm LPG)

• Temperature; humidity: 20℃±2℃；65%±5%RH

• Standard test circuit: Vc:5.0V±0.1V；VH: 5.0V±0.1V

• Preheat time: ≧ 48H

The gas sensitive material used in MQ-7 gas sensor is SnO2, which is of lower electrical conductivity in clean air.

It detects carbon monoxide with low temperature (heated by 1.5V) through high-low temperature cycles.

The electrical conductivity of the sensor increases with the increase of the carbon monoxide concentration in the air. The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.

The sensitivity of MQ-7 gas sensor to carbon monoxide is quite high, so it can be used to detect various gas containing carbon monoxide. It is a low-cost sensor suitable for a variety of applications.

Specification

• Target Gas: carbon monoxide

• Detectable Concentration: 300-10000ppm CO

• Operating voltage: 5V

• Heating Voltage VH: 5.0V±0.2V ACorDC(hight); 1.5V±0.1V ACorDC(low)

• Load Resistance RL: adjustable

• Heating Resistance RH: 31Ω±3Ω(Room temperature)

• Heating Power PH: ≤350mW

• Surface Resistance of Sensitive Material R: 2KΩ-20KΩ(in100ppmCO)

• Sensitivity S: Rs(in air)/Rs(100ppmCO)≥5

• Concentration Slope: α ≤0.6(R300ppm/R100ppm CO)

• Temperature, Humidity: 20℃±2℃ ; 65%±5%RH

• Standard Test Circuit: Vc:5.0V±0.1V; VH(high): 5.0V±0.1V; VH(low): 1.5V±0.1V

The gas sensitive material used in MQ-8 gas sensor is SnO2, which is of lower electrical conductivity in clean air.

When there is hydrogen in the environment where sensor resides, the electrical conductivity of the sensor increases with the increase of the hydrogen concentration in the air.

The change of electrical conductivity can be converted to the output signal corresponding to that of the gas concentration by using a simple circuit.

The sensitivity of MQ-8 gas sensor to hydrogen is quite high, it can also detect a variety of other gases containing hydrogen.

This sensor is suitable for a variety of applications, is definitely a good catch.

Specification

• Detectable concentration: 100-1000ppm (hydrogen)

• Operating voltage: 5V

• Heating voltage VH: 5.0V±0.1V AC or DC

• Load resistance RL: adjustable

• Heating resistance RH: 29±3Ω(Room temperature)

• Heating power: PH ≤900mW

• Sensitivity S: Rs(in air)/Rs(1000ppm H2)≥5

• Output voltage Vs: 2.5-4.0V（1000ppm H2）

• Concentration slope: α≤0.6(R1000ppm/R400ppm H2)

• Temperature ; humidity: 20℃±2℃；55%±5%RH

• Standard test circuit: Vc:5.0V±0.1V；VH: 5.0V±0.1V

MQ135 adopts SnO2 as its gas sensitive material because SnO2 has low electrical conductivity in the clean air.

So when surrounded by polluted air, the electrical conductivity of MQ135 will increase with the increase of pollutants, and the change in electrical conductivity can be converted to corresponding output signal.

MQ135 has a high sensitivity to Ammonia, sulfide, benzene vapor, smoke and other harmful gas.

It can detect various harmful gases, making it a cost-effective choice suitable for multiple applications.

Specification

• Product model: MQ135

• Product type: Semiconductor gas sensor

• Target gas: Ammonia; methylbenzene; hydrogen

• Operating voltage: 5V

• Heater voltage: VH 5.0V±0.2V AC or DC

• Load resistance: Adjustable RL

• Heater power consumption: PH ≤900mW

• Sensitivity: S Rs(in air)/Rs(100ppmNH3)≥5

• Concentration slope: α ≤0.6 (R100ppm/R50ppm NH3)

• Standard testing temperature/humidity: 20℃±2℃/65%±5%RH

• Standard testing circuit: Vc:5.0V±0.1V; VH: 5.0V±0.1V

• Preheating time: ≧48H