MQ-135 PDF Datasheet – Gas Sensor

This post explains for the gas sensor.

The Part Number is MQ-135, MQ135.

The function of this semiconductor is Gas Sensor.

Manufacturer: Hanwei Electronics


MQ-135 gas sensor


The MQ-135 is a gas sensor module used to detect a variety of harmful gases in the air. It is commonly used in air quality monitoring devices, gas leakage detectors, and environmental monitoring systems.


1. Wide detecting scope

2. Fast response and High sensitivity

3. Stable and long life

4. Simple drive circuit


MQ-135 pdf sensor


They are used in air quality control equipments for buildings/offices, are suitable for detecting
of NH3, NOx, alcohol, Benzene, smoke, CO2 ,etc

1. Air quality monitoring: It can be used in air quality monitoring systems to detect the concentration of harmful gases and help assess air pollution levels.

2. Gas leakage detection: The sensor can be incorporated into gas leakage detection devices to alert users in case of gas leaks.

3. Indoor air quality monitoring: It can be used to monitor the air quality inside homes, offices, and buildings to ensure a healthy and safe environment.

4. Environmental monitoring: The sensor can be deployed in environmental monitoring systems to track pollutant levels in various locations.


A. Standard work condition Symbol Vc VH RL RH PH Symbol Tao Tas RH O2 Parameter name Circuit voltage Heating voltage Load resistance Heater resistance Heating consumption Technical condition 5V±0.1 5V±0.1 can adjust 33Ω ±5% less than 800mw Technical condition -10℃…+45℃ -20℃…+70℃ less than 95%Rh 21%(standard condition)Oxygen concentration can affect sensitivity Technical parameter 30KΩ -200KΩ (100ppm NH3 ) ≤ 0.65 Vc:5V±0.1 Vh: 5V±0.1 Remarks AC OR DC ACOR DC Room Tem B. Environment condition Parameter name Using Tem Storage Tem Related humidity Oxygen concentration Remarks min […]

MQ-135 pinout datasheet

MQ-135 PDF Datasheet

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MQ-136 PDF – GAS SENSOR – Hanwei

Part Number: MQ-136, MQ136

Function: GAS SENSOR


Images:MQ-136 pdf gas sensor


MQ-136 is Gas Sensor. The MQ-136 is a type of gas sensor module that is designed to detect the presence of hydrogen sulfide gas (H2S) in the air. The MQ series of gas sensors are widely used for various gas detection applications and are commonly found in industrial settings, environmental monitoring systems, safety equipment, and more.

1. Gas Sensor: The core component of the module is the gas sensor itself, which is sensitive to hydrogen sulfide gas. The sensor’s electrical resistance changes in the presence of the target gas.

2. Heater Element: The gas sensor usually includes a built-in heater element. The heater heats the sensor to a specific operating temperature, enhancing its sensitivity and responsiveness to gas detection.

3. Signal Conditioning Circuitry: The module often contains signal conditioning circuitry that converts the change in sensor resistance into a measurable voltage or current output. This output can be interfaced with microcontrollers, data loggers, or other monitoring systems.


1. Fast response and High sensitivity

2. Stable and long life

3. Simple drive circuit

MQ-136 datasheet pinout


They are used in air quality control equipments for buildings/offices, are suitable for detecting of H2S.


A. Standard work condition Symbol Parameter name Vc Circuit voltage VH Heating voltage RL Load resistance RH Heater resistance PH Heating consumption B.

MQ-136 PDF Datasheet