Ozone Gas Sensor （Model：MQ131 Low Concentration） Manual Version: 1.6 Valid from: 2021-07-01 Zhengzhou Winsen Electronics Technology Co.,

Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not...

Zhengzhou Winsen Electronics Technology Co., Ltd MQ131 Ozone Gas Sensor (Low Concentration) Profile Sensitive material of MQ131 gas sensor is a semiconductor metal oxide with high 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. MQ131 ozone gas sensor has high sensitivity to ozone, and also has sensitivity to strong oxide gases, such as Cl2, NO2 etc. It responses oppositely to organic interference...

Zhengzhou Winsen Electronics Technology Co., Ltd Basic Circuit Fig2. MQ131 Test Circuit Instructions: The above fig is the basic test circuit of MQ131.The sensor requires two voltage inputs: heater voltage (VH) and circuit voltage(VC). VH is used to supply standard working temperature to the sensor and it can adopt DC or AC power, while VRL is the voltage of load resistance RL which is in series with sensor. Vc supplies the detect voltage to load resistance RL and it should adopts DC power. Calculation formula: Resistance of Sensitive materials (Rs)=(Vc/VRL-1)×RL; Power consumption of Sensitive...

Zhengzhou Winsen Electronics Technology Co., Ltd Description of Sensor Characters The ordinate is resistance ratio of the sensor (Rs/R0), the The ordinate is resistance ratio of the sensor (Rs/Rso).Rs abscissa is concentration of gases. Rs means resistance in means resistance of sensor in 200ppb O3 gas under different target gas with different concentration, R0 means tem. and humidity. Rso means resistance of the sensor in resistance of sensor in clean air. All tests are finished under standard test conditions. Fig5.Sensitity Curve Fig5 shows the VRL in O3 gas with different concentration. The...

Zhengzhou Winsen Electronics Technology Co., Ltd 1.2 High Corrosive gas If the sensors are exposed to high concentration corrosive gas (such as H2S, SOX, Cl2, HCl etc.), it will not only result in corrosion of sensors structure, also it cause sincere sensitivity attenuation. 1.3 Alkali, Alkali metals salt, halogen pollution The sensors performance will be changed badly if sensors be sprayed polluted by alkali metals salt especially brine, or be exposed to halogen such as fluorine. 1.4 Touch water Sensitivity of the sensors will be reduced when spattered or dipped in water. 1.5 Freezing Do avoid...

Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com assembling line, pneumatic screwdriver/ultrasonic welding machine can lead this vibration. 2.6 Concussion If sensors meet strong concussion, it may lead its lead wire disconnected. 2.7 Usage Conditions 2.7.1For sensor, handmade welding is optimal way. The welding conditions as follow:     Soldering flux: Lead-free and halogen-free flux homothermal soldering iron Temperature: ≤350℃ Time: no more than 3 seconds If disobey the above using terms, sensors sensitivity will reduce. Zhengzhou Winsen Electronics Technology Co.,...