MQ2 MQ3 MQ4 MQ5 MQ6 MQ7 MQ8 MQ9 MQ135 Smoke Alcohol Methane LPG Carbon Monoxide Hydrogen Gas Sensor

MQ2 Smoke Gas Sensor Module

A general purpose gas sensor able to detect LPG, butane, methane, alcohol, hydrogen, and smoke. This sensor has a high sensitivity and fast response time. The module outputs a voltage from 0 to 5V relative to the gas concentration.

MQ3 Alcohol Gas Sensor Module

Used for detecting alcohol concentration on your breath, like a Breathalyzer. This sensor has a high sensitivity and fast response time. The module outputs a voltage from 0 to 5V relative to the alcohol concentration.

Specifications:

• Concentration : 0.05 mg/L ~ 10 mg/L Alcohol
• Operating Voltage : 5V ±0.1
• Current Consumption : 150mA
• Operation Temperature : -10°C ~ 70°C

Pin Out:

• VCC – Input Power Supply
• GND – Supply Ground
• DO – Digital Output
• AO – Analog Output

MQ4 Methane Gas Sensor Module

A Compressed Natural Gas Sensor (CNG), which is mostly made up of methane (CH4), it is suitable for sensing natural gas concentrations in the air. The MQ4 can detect natural gas concentrations anywhere from 200 to 10000ppm.

MQ-5 Liquefied Gas Methane Gas Sensor Module

The Simple MQ-5 Methane LPG Liquid Propane Gas Sensor Module is a great way to add basic gas sensing to your project at a reasonable price. TheMQ-5 Methane LPG Liquid Propane Gas Sensor Module particulate sensor uses a Buzzer to sense any detected material that is even present in the air!

MQ6 LPG Gas Sensor Module

This sensor has a high sensitivity and fast response time. The module outputs a voltage from 0 to 5V relative to the gas concentration.

MQ7 Carbon Monoxide Gas Sensor Module

Used to detect Carbon Monoxide (CO) concentration, it can detect CO-gas concentrations anywhere from 20 to 2000ppm. This sensor has a high sensitivity and fast response time. The module outputs a voltage from 0 to 5V relative to the CO concentration.

MQ8 Hydrogen Gas Sensor Module

Suitable for sensing hydrogen concentrations in the air. The MQ8 can detect hydrogen gas concentrations from 100-10000ppm.

MQ-9 Gas Sensor Module

It has high sensitivity to Carbon Monoxide, Methane and LPG. Sensitive material of MQ-9 gas sensor is SnO2, which with lower conductivity in clean air. It makes detection by cycling high and low temperature, and detects CO when low temperature (heated by 1.5V). The sensor’s conductivity is higher along with the gas concentration rising. When temperature rises (heated by 5.0V), it detects Methane, Propane, combustible gas, etc. and cleans the other gases as it adsorbed under low temperature. MQ-9 usually applied in domestic gas leakage detector, industrial gas detector, portable gas detector, etc. Waterproof, X-ray proof, temperature proof, and shockproof

MQ135 Air Quality Sensor

A device that is used to detect or measure or monitor the gases like ammonia, benzene, sulfur, carbon dioxide, smoke, and other harmful gases are called as an air quality gas sensor.

Specifications and Features:

• It has a wide detection scope.
• High sensitivity and faster response.
• Long life and stability.
• The operating voltage: +5V.
• Measures and detects NH3, alcohol, NOx, Benzene, CO2, smoke etc.
• Range of analog output voltage: 0V-5V.
• Range of digital output voltage: 0V-5V (TTL logic).
• Duration of preheating: 20 seconds.
• Used as an analog or digital sensor.
• The potentiometer is used to vary the sensitivity of the digital pin.
• Heating Voltage: 5V±0.1.
• Load resistance is adjustable.
• Heater resistance: 33ohms±5%.
• Heating consumption:<800mW.
• Operating temperature: -10°C to -45°C.
• Storage temperature: -20°C to -70°C.
• Related humidity: <95%Rh.
• Oxygen concentration: 21% (affects the sensitivity).
• Sensing resistance: 30kiloohms to 200kiloohms.
• Concentration slope rate: ≤0.65.
• Preheat time: over 24 hrs.
• Simple drive circuit.