NDIR Infrared CH4 Gas Sensor
（Model：MH-441D） Manual
Version: 1.1
Valid from: 2022.12.01 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.
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right to improve the products without notice. Please confirm it is the valid version before using this
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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 MH-441D NDIR Infrared CH4 Sensor
1. Introduction
MH-440D infrared gas sensor is a miniature universal intelligent sensor, which
adopts NDIR theory to detect concentration of CH4 in air and has good
selectivity, stable performance, long life, also is independent of Oxygen. The
inside temperature sensor could be used for temperature compensation. This
miniature infrared gas sensor is developed by the tight integration of mature …
