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Principle Introduction
| The gas sensing material used in the MEWOI-MIX3003 gas sensor is a semiconductor material with low conductivity in clean air. When there is alcohol vapor in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the alcohol gas concentration in the air. The change in conductivity can be converted into an output signal corresponding to the gas concentration using a simple circuit. |
Features
| *High sensitivity *Reliable performance *Low cost *Long use service *Small appearance |
Application
| * Alcohol alarming in Vehicle * Portable Alcohol detector |
Technical Parameters
| Item | Specification |
| Detection Gas | Alcohol Gas |
| Detection Concentration | 25～500ppm |
| Heating Voltage(VH） | 0.9V±0.1V AC or DC |
| Load Resistance（RL） | Adjustable |
| Loop Voltage | ≤6V DC |
| Heating Resistance（RH） | 4.0Ω±0.5Ω（Room Temp.） |
| Heating Power(PH) | ≤140mW |
| Resistance of Sensitive Body Surface(R0) | 1KΩ～400KΩ(in air) |
| Sensitivity（S） | R0(in air)/Rs(in 125ppm alcohol)≥3 |
| Concentration Slope | ≤0.6(R300ppm/R50ppm alcohol) |
| Test Environment | 20℃±2℃；55%±5%RH |
| Standard Test Circuit | Vc:3.0V±0.1V DC ；VH: 0.9V±0.1V DC |
| Preheating Time | More than 48 hours |
