MQ868 Low Concentration Ozone Gas Sensor
Principle Introduction:
Strong First Electronics, as a professional gas sensing solution provider with over 30 years gas sensor manufacture experience, offers Ozone O3 gas sensor.
Sensitive material of MQ868 gas sensor is WO3, which with lower conductivity in clean air. When the ozone gas exists, the sensor’s conductivity gets lower along with the gas concentration rising. Users can convert the change of conductivity to correspond output signal of gas concentration through a simple circuit.
MQ868 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide such as Cl2, NO2 &etc. It responses oppositely to organic interference gases.
Applications :
It is widely used in domestic ozone concentration alarm, industrial ozone concentration alarm and portable ozone concentration detector.
Technical parameters :
| Model | MQ868 | ||
| Sensor Type | Semiconductor | ||
| Standard Encapsulation | Plastic cap | ||
| Target Gas | Ozone | ||
| Detection range | 10～1000ppb Ozone | ||
| Standard Circuit Conditions | Loop Voltage | Vc | ≤24V DC |
| Heater Voltage | VH | 5.0V±0.1V AC or DC | |
| Load Resistance | RL | Adjustable | |
| Sensor character under standard test conditions | Heater Resistance | RH | 34Ω±3Ω (room tem.) |
| Heater consumption | PH | ≤900mW | |
| Sensitivity | S | Rs(in air)/Rs(in 200ppb O3)≥2 | |
| Output Voltage | △Vs | ≥1.0V(in 200ppb O3) | |
| Concentration Slope | α | ≤0.6(R500ppb/R100ppb O3) | |
| Standard test conditions | Tem. Humidity | 20℃±2℃；55%±5%RH | |
| Standard test circuit | Vc:5.0V±0.1V； VH: 5.0V±0.1V | ||
| Preheat time | Over 48 hours | ||
