NDIR Infrared CH4 Gas Sensor
（Model：MH-441D） Manual
Version: 1.1
Valid from: 2022.12.01 Zhengzhou Winsen Electronics Technology Co., Ltd Statement
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written permission, any part of this manual shall not be copied, translated, stored in database or
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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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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 …