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- Good sensitivity to hydrogen sulfide, liquefied gas, natural gas, city gas, and smoke with long service life and reliable stability.
- The TTL output effective signal is low. (The signal light is on when the output is low and can be directly connected to the microcontroller)
- Dual signal output (analog output and TTL level output).
- Analog output 0 ~ 5V voltage, the higher the concentration the higher the voltage.
- The main chip: LM393, ZYMQ-136 gas sensors
MQ-136 Hydrogen Gas Sensor For Hydrogen Sulfide Detector Module
MQ136 Gas Sensor can be used to monitor the concentration of Hydrogen Sulfide gas. This Module simplifies using the MQ-136 gas sensor by providing digital as well as analog output which can be interfaced with Microcontrollers, Arduino, and Raspberry pi.
The sensitive material of the MQ136 gas sensor is SnO2, which with lower conductivity in clean air. When the target Hydrogen sulfide gas exists, the sensor’s conductivity is higher along with the Hydrogen sulfide concentration rising.
Please use a simple electric circuit, Convert the change of conductivity to the corresponding output signal of gas concentration. MQ136 gas sensor has a high sensitivity to Hydrogen sulfide, Low sensitivity to other combustible gas. It is at a low cost and suitable for different applications.
Applications:
- Domestic Hydrogen sulfide detector
- Industrial Hydrogen sulfide detector
- Portable Hydrogen sulfide detector
- Gas leak monitoring device suitable for home or factory, suitable for liquefied gas, butane, propane, methane, alcohol, hydrogen, smoke, and other monitoring devices.
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Package Includes:
1 X MQ-136 Hydrogen Gas Sensor
Package Includes:
MQ136 Gas Sensor Specifications
| Model | MQ136 Gas Sensor |
| Operating Voltage | 5V (DC) |
| Dimensions | 3 x 2 x 1cms |
| Weight | 5 grams |
1. What are gas sensors? How do they work?
- Gas sensors (also known as gas detectors) are electronic devices that detect and identify different types of gasses. They are commonly used to detect toxic or explosive gasses and measure gas concentration.
Gas sensor detects the presence or concentration of gases in the atmosphere. Based on the concentration of the gas the sensor produces a corresponding potential difference by changing the resistance of the material inside the sensor, which can be measured as output voltage. Based on this voltage value the type and concentration of the gas can be estimated.
2. How to use MQ-136 Gas Sensor?
- Power the module with 5V and you should notice the power LED on the module to glow and when no gas it detected the output LED will remain turned off meaning the digital output pin will be 0V. Remember that these sensors have to be kept on for pre-heating time before you can actually work with it. Now, introduce the sensor to the gas you want to detect and you should see the output LED to go high along with the digital pin, if not use the potentiometer until the output gets high. Now every time your sensor gets introduced to this gas at this particular concentration the digital pin will go high (5V) else will remain low (0V).
