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CO and combustible gas sensor
| Part number | MQ-9 |
|---|---|
| Category | Sensors › Gas & Air Quality |
| Package | Header-1x4 |
| Pins | 4 |
MQ-9 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | 1 | bidirectional | Pin 1 |
| 2 | GND | ground | Ground |
| 3 | 3 | bidirectional | Pin 3 |
| 4 | VCC | power | Supply |
Schematic symbol and footprint
Schematic symbol
Footprint: Header 1x4 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
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