Air-Quality Gas Sensor (Model: MP905) Zhengzhou Winsen Electronics Technology Co., Lt

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 MP905 Air-Quality Gas Sensor Profile MP905 gas sensor is for air quality. It adopts multilayer thick film manufacturing technology. The heater and metal oxide semiconductor material on the ceramic substrate of subminiature Al2O3 are fetched out by electrode down-lead, encapsulated in metal socket and cap. Conductivity of the sensor is affected by the concentration of target gas. The higher the concentration is, the higher conductivity of sensor gets. Users can adopt simple circuit to convert variation of conductivity into output signal corresponding...

Zhengzhou Winsen Electronics Technology Co., Ltd Basic Circuit Instructions: The above fig is the basic test circuit of MP905.The sensor requires heater voltage (VH) and circuit voltage (VC) which share one source. They must adopt DC power. VRL is the voltage of load resistance RL which is in series with sensor. Description of Sensor Characters Alcohol Acetone Methanal Toluene benzene H2 Iso-butane Smoke Concentration (ppm) Rs means resistance in target gas with different Rs means resistance of sensor in 10ppm alcohol under concentration, R0 means resistance of sensor in clean air. different...

Zhengzhou Winsen Electronics Technology Co., Ltd 老化天数（天） Aging Time (day) Fig7.long-term Stability of MP905 NOTE: Test is finished in standard test conditions, the abscissa is observing time and the ordinate is VRL. Cautions 1 .Following conditions must be prohibited 1.1 Exposed to volatilizable organic silicon steam Sensing material will lose sensitivity and never recover if the sensor absorbs organic silicon steam. Sensors must avoid exposing to silicon bond, fixature, silicon latex, putty or plastic contain silicon environment. 1.2 High Corrosive gas If the sensors are exposed to high concentration...

Zhengzhou Winsen Electronics Technology Co., Ltd 3 2 1 Fig8. Pins Schematic Diagram 2 .Following conditions should be avoided 2.1 Water Condensation Indoor conditions, slight water condensation will influence sensors’ performance lightly. However, if water condensation on sensors surface and keep a certain period, sensors’ sensitive will be decreased. 2.2 Used in high gas concentration No matter the sensor is electrified or not, if it is placed in high gas concentration for long time, sensors characteristic will be affected. If lighter gas sprays the sensor, it will cause extremely damage. 2.3...