Mq 7 Gas Sensor Circuit Diagram

Here is its sensitivity characteristic curve: One is through the dout pin which gives a high when the concentration threshold is reached and low otherwise. Web in this project, we will use the mq2 gas sensor circuit to detect methane, butane, lpg, smoke which is released into the environment at the time of the gas leak. This is a graph of rs/r0 vs.

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Web Here Is Its Schematic Diagram:

Mq2 gas sensor circuit diagram is as shown in the figure. Web set up of combined simple air sensors. Web 2.1.1 struktur sensor mq7.

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Rs is the resistance of the sensor in target gas while r0 is the resistance in clean air. View publication pinout of mq2. The threshold can be varied by adjusting the trimmer on the breakout board which is rp in the schematic.

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Web pinout of mq2 gas sensor module. If you look at the graph on the datasheet, you will see graphs for hydrogen, lpg. Sensors that have been used:

Web The Problem With Almost All Of The Mq Sensors Is That Each Detects Multiple Gases.

Mq2 gas sensor can sense butane, lpg, smoke, alcohol, propane, hydrogen, methane and carbon monoxide. Virtually any npn transistor that can handle 300 ma or more will work here.