MEMS Catalytic H2 Sensor （Model: CMV-2021D） Manual Version: 1.2 Issue Date: 2022-06-29 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 CMV-2021D Catalytic H2 Sensor Profile CMV-2021D catalytic hydrogen sensor adopts MEMS process, works according to the principle of catalytic combustion effect, and is paired by a detection element and a compensation element to form an arm of the bridge, when the resistance of the detection element increases, the output voltage of the bridge changes, the voltage variable increases proportionally with the increase of hydrogen concentration, and the compensation element plays a reference and temperature and humidity compensation role. Features The...

Zhengzhou Winsen Electronics Technology Co.,Ltd Basic circuit The right picture is the basic test circuit of CMV-2021D. It should be applied by 3.0V. D is test element while C is compensation element. Bridge output Test voltage Fig2.Test circuit Technical Parameters Sensor Type MEMS Catalytic Standard Encapsulation Plastic Encapsulation Working voltage(V) Working current(mA) Linearity Measuring range(%LEL) Startup time in air Working Environment Storage Environment

Zhengzhou Winsen Electronics Technology Co.,Ltd Sensitivity, response and recovery sensitivity(mV) H2 concentration/%LEL Concentration Fig3. Sensitivity Curve Time (s) Fig4. Response and recovery curve Changing of output signal with different voltage supply Output(mV) Working Voltage(V) Fig5. Zero point at different voltage Fig6. Sensitivity at different voltage Response value/mV Email: [email protected]

Zhengzhou Winsen Electronics Technology Co.,Ltd Cautions 1 .Following conditions must be prohibited 1.1 Exposed to 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 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...

Zhengzhou Winsen Electronics Technology Co.,Ltd If you use reflow welding, the welding conditions as follow: Neutral atmosphere Welding temperature 250±10℃ Avoid flux vapor If disobey the above using terms, sensors sensitivity will be reduced. 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: [email protected] Website: www.winsen-sensor.com Email: sales@winsens