Part Number: MQ-136, MQ136
Function: Semiconductor Gas Sensor
Manufacturer: HANWEI ELECTRONICS
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Description
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.
Features
- High sensitivity to hydrogen sulfide (H2S)
- Fast response and recovery characteristics
- Stable performance and long operating life
- Simple drive circuit
- Built-in heater element for stable operation
- SnO2 semiconductor sensing technology
- Wide detection range for H2S gas
- Suitable for continuous gas monitoring
- Easy interface with microcontrollers and ADC circuits
- Reliable performance for industrial gas detection
Design Notes
- Allow sufficient preheating time before taking gas concentration measurements
- Adjust the load resistance to optimize sensitivity for the intended H2S concentration range
- Avoid exposing the sensor to silicone vapors or corrosive chemicals that may degrade performance
- Install the sensor in locations with adequate airflow for accurate gas sampling
- Periodic calibration is recommended for long-term measurement accuracy
Typical Circuit Usage
- Hydrogen sulfide gas leak detectors
- Industrial safety monitoring equipment
- Air quality monitoring systems
- Environmental monitoring stations
- Microcontroller-based gas detection circuits
- IoT environmental sensing devices
How to Choose This Part
- Select for applications requiring selective detection of hydrogen sulfide gas
- Suitable for industrial and environmental gas monitoring
- Choose when a low-cost semiconductor gas sensor is preferred
- Ideal for Arduino, ESP32, Raspberry Pi, and embedded monitoring systems
- Consider routine calibration for quantitative gas concentration measurements
Applications
- Hydrogen sulfide (H2S) gas detection
- Industrial safety systems
- Air quality control equipment
- Building and office environmental monitoring
- Gas leakage alarm systems
- Wastewater treatment facilities
- Chemical processing plants
- Smart environmental monitoring devices
Alternative / Equivalent Products
- MQ-135
- MQ-137
- MQ-2
- MiCS-4514
- ZE07-H2S
- ME3-H2S Electrochemical Sensor
MQ-136 PDF Datasheet
