MC227D

Catalytic Flammable Gas Sensor （Model: MC227D） User’s Manual Version: 1.0 Valid from: 2022-1-20 Zhengzhou Winsen Electronics Technology Co., Ltd 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 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 MC227D Catalytic Flammable Gas Sensor Product MC227D adopts catalytic combustion principle, and its two arms of electric bridge consists of a test element and a compensate element. The resistance of the test element rises once it meets the combustible gases, in the same time, the output voltage of the bridge changes and the voltage variation rises in direct proportion to the gas concentration. The compensate element, as a conference, has the function of compensating temperature and humidity. Features Bridge output voltage in linear Fast response Good repeatability and selectivity Good stability and reliability Resist H2S poisoning & organosilicone. Main Applications It is widely used in public places (not industrial occasion) to detect the concentration or leakage of combustible gases such as natural gas, LPG, coal gas. Fig1. Sensor Structure Parameters: Model MC227D Sensor Type Catalytic Type Standard Encapsulation Plastic base & metal cap Working voltage(V) 2.5±0.1 Working current(mA) 150±10 Sensitivity 20%LEL CH4 12～35 (mV) 20%LEL C3H8 10～30 Linearity ≤5% Measuring range(%LEL) 0～100 Response Time (90%) ≤10s Recovery Time (90%) ≤30s Working Environment -40～+70℃