| Manufacturer | Part Number | Description |
|---|---|---|
Henan Hanwei Electronics |
MQ-4 | Semiconductor Sensor |
| HANWEI ELECTRONICS | MQ-136 | GAS SENSOR |
| HANWEI ELECTRONICS | MQ-137 | GAS SENSOR |
| HANWEI ELECTRONICS | MQ-138 | GAS SENSOR |
|
Henan Hanwei Electronics |
MQ-9 | Semiconductor Sensor |