MQ-4 Methane Gas Sensor

Features:

• It adopts high quality double panel design with power indication and TTL signal output indication
• It has DO switch signal (TTL) output and AO analog signal output
• The TTL output valid signal is low (When the output is low, the signal light is on, it can be directly connected to the MCU or relay module)
• The voltage of the analog output, the higher the concentration, the higher the voltage
• It has good sensitivity to gas and natural gas detection
• There are four screw holes for easy positioning
• Has a long service life and reliable stability
• Fast response recovery characteristics
  

Specification:

• The gas sensing material used in the MQ-4 gas sensor is tin dioxide (SnO2) with low conductivity in clean air
• When there is a flammable gas in the environment where the sensor is located, the conductivity of the sensor increases as the concentration of flammable gas in the air increases
• A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration
• The MQ-4 gas sensor has high sensitivity to butane, propane and methane, and has a good balance between methane and propane
• This sensor detects a wide range of flammable gases, especially natural gas, and is a low cost sensor for a variety of applications
• Suitable for monitoring equipment for liquefied gases, natural gas and gas in the home or industry. Excellent resistance to ethanol and smoke

Technical Details:

• Detection of Gas: Natural gas/Methane
• Detection of Concentration: 300-10000ppm
• Input Voltage: DC5V
• Power Consumption (current): 150mA
• DO Output: TTL digital quantities 0 and 1 (0.1 and 5V)
• AO Output: 0.1-0.3V (relatively non-polluting), the highest concentration voltage is about 4V
• Using the chip: AT89S52
• Crystal: 11.0592MHZ
• Baud Rate: 9600
  

Note: After the sensor is energized, it needs to be preheated for about 20S, and the measured data is stable. The heating of the sensor is a normal phenomenon, because there is a heating wire inside, if it is hot, it is not normal.

We also carry:

• MQ-2 Flammable Gas and Smoke Sensor
• MQ-3 Alcohol Gas Sensor
• MQ-4 Methane Gas Sensor
• MQ-5 LPG and Natural Gas Sensor
• MQ-6 LPG/Isobutane/Propane Gas Sensor
• MQ-7 Carbon Monoxide Gas Sensor
• MQ-8 Hydrogen Gas Sensor
• MQ-9 Carbon Monoxide and Flammable Gas Sensor
• MQ-135 Air Quality Sensor