Catalytic Flammable Gas Sensor （Model: MC227D） User’s Manual Version: 1.2 Valid from: 2022-7-29 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 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...

Zhengzhou Winsen Electronics Technology Co., Ltd Sensitivity and Response Feature Response & Recovery Curve Sensitivity curve Voltage output (mV) Fig4. Response and recovery curve recovery curve recovery curve recovery Changing of output signal at different temperature Temperature Fig5.Zero point at different temp. Temperature Fig6. Sensitivity at different temp. Changing of output signal at different humidity Voltage Output (mV) Fig7.Zero point at different humidity Humidity Fig8. Sensitivity at different humidity Email: [email protected]

Zhengzhou Winsen Electronics Technology Co., Ltd Changing of output signal with different voltage supplying Voltage Output (mV) Working voltage(V) Fig10.Sensitivity with different voltage Fig9.Zero Drift with different voltage 线 Long-term Stability The drift in air per year is within ±2mV, in 20%LEL C3H8 is within ±5mV. For a short period storage (in 2 weeks), the sensor need be galvanical continuously for 8 hours to reach stability. For long period storage (one year), it need 48 hours. Time (weeks) Fig11. Zero and Sensitivity stability curve Cautions 1 .Following conditions must be prohibited...

Zhengzhou Winsen Electronics Technology Co., Ltd 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, even if the sensor is not physically damaged or broken, it causes down-line or heater damaged, and bring on sensors’ sensitivity characteristic changed badly. 2 .Following conditions must...