MP901 WINSEN | Alldatasheet
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Technical content
(Model: MP901) Manual Version：1.1 Valid From：2014.08.10 Zhengzhou Winsen Electronics Technology Co., Ltd
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 be responsible for the loss. The specific such as color, appearance, sizes &etc, please in kind prevail. We are devoting ourselves to products development and technical innovation, so we reserve the right to improve the products without notice. Please confirm it is the valid version before using this manual. At the same time, users’ comments on optimized using way are welcome. Please keep the manual properly, in order to get help if you have questions during the usage in the future. Zhengzhou Winsen Electronics Technology CO., LTD
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com Leading gas sensing solutions supplier in China! MP901 Air-Quality Gas Sensor Profile MP901 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 concentra tion 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 to gas concentration.
Features
High sensitivity to alcohol, smoke, formaldehyde, toluene, acetone, benzene, lighter gas, paint; quick response and resume; low power consumption, simple detection circuit, good stability and long life. Main Application It is used in occasions such as household and office for harmful gas detection, automatic exhaust device, air cleaner&etc. Technical Parameters Stable1. Fig1. Sensor Structure Model MP901 Sensor Type Semiconductor flat surfaced sensor Standard Encapsulation Metal Cap Detection Gas alcohol, smoke, formaldehyde, toluene, acetone, benzene, lighter gas, paint &etc. Detection range 1～50ppm Standard circuit Loop voltage VC / VH 5.0V±0.1V DC Load resistance RL Adjustable sensor features in standard test condition Heating resistance RH 95Ω±10Ω(Room Tem.) Heating consumption PH ≤300mW Surface resistance RS 5KΩ～60KΩ(in 10ppm alcohol) Sensitivity S Rs(in air)/Rs(in 10ppm alcohol）≥3 Concentration slope α ≤0.6(R 50ppm/R 5ppm alcohol) Standard condition of test Temperature, humidity 20℃±2℃；65%±5%RH Standard test circuit VC/VH :5.0V±0.1V Warm-up time More than 48 hours
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com Leading gas sensing solutions supplier in China! Basic Circuit Fig2. MP901 Test Circuit Instructions: The above fig is the basic test circuit of M P901.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 Fig5.Responce and Resume Fig6.Linearity curve Rs/R0 Rs/Rs0 RH VC/VH MP901 measure 10ppmAlcohol Concentration (ppm) Acetone Alcohol Methanal Toluene Iso-butane Smoke Fig3.Typical Sensitivity Curve Rs means resistance in target gas with different concentration, R0 means resistance of sensor in clean air. All tests are finished under standard test conditions. Fig4.Typical temperature/humidity characteristics Rs means resistance of sensor in 10ppm alcohol under different tem. and humidity. Rso means resistance of the sensor in 50ppm alcohol under 20℃/55%RH. Acetone Alcohol Methanal Toluene Iso-butane Concentration (ppm) Concentration (ppm) Voltage Output(V)
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com Leading gas sensing solutions supplier in China! Fig7.long-term Stability of MP901 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. S ensors 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 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 icing on sensor’s surface, otherwise sensing material will be broken and lost sensitivity.
1.6 Applied higher voltage
Applied voltage on sensor should not be higher than stipulated value , e ven if the sensor is not physically damaged or broken, it causes down-line or heater damaged, and bring on sensors’ sensitivity characteristic changed badly.
1.7 Voltage on wrong pins
As Fig8,Pin 1connects to heater (or test) power supply, Pin 2 connects to load resistance, Pin 3 connects ground.; Fig8. Pins Schematic Diagram 3 2 1 Time (day) Output Voltage (V)
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com Leading gas sensing solutions supplier in China! 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 concentr ation for long time , sensors characteristic will be affected. If lighter gas sprays the sensor, it will cause extremely damage.
2.3 Long time storage
The sensors resistance will drift reversibly if it’s stored for long time without electrify, this drift is related with storage conditions. Sensors should be stored in airproof bag without volatile silicon compound. For the sensors with long time storage but no electrify, they need long galvanical aging time for stability before using. The suggested aging time as follow: Stable2. Storage Time Suggested aging time Less than one month No less than 48 hours 1 ~ 6 months No less than 72 hours More than six months No less than 168 hours
2.4 Long time exposed to adverse environment
No matter the sensors electrified or not, if exposed to adverse environment for long time, such as high humidity, high temperature, or high pollution etc., it will influence the sensors’ performance badly.
2.5 Vibration
Continual vibration will result in sensors down-lead response then break. In transportation or 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: Rosin soldering flux contains least chlorine homothermal soldering iron Temperature： 250℃ Time：less than 3 seconds 2.7.2If users choose wave-soldering, the following conditions should be obey: Soldering flux: Rosin soldering flux contains least chlorine Speed: 1-2 Meter/ Minute Warm-up temperature：100±20℃ Welding temperature：250±10℃ One time pass wave crest welding machine If disobey the above using terms, sensors sensitivity will reduce. Zhengzhou Winsen Electronics Technology Co., Ltd Add: No.299, Jinsuo Road, National Hi-Tech Zone, Zhengzhou 450001 China Tel: +86-371-67169097 / 67169670 Fax: +86-371-60932988 E-mail: sales@winsensor.com Website: www.winsen-sensor.com