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Distances at which all four sensors lose their sensitivity under pure substances.
| Sensor | Distance at Which the Sensor Loses Its Sensitivity Under Pure Substances |
|---|---|
| TGS-826, Ammonia and amines | 4 cm |
| MQ-135, CO2 | 4 cm |
| MQ-3, Alcohol | 7.6 cm |
| MQ-138, Acetone | 4 cm |
