User’s Manual Version：1.1 Valid From：2023-10-25 Zhengzhou Winsen Electronic 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 MH-Z1911A infrared CO2 sensor is intelligent sensor as shown in Figure 1,common type, small size, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation, and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design. Terminal type *High sensitivity, low power consumption *Good stability...

Zhengzhou Winsen Electronics Technology Co., Ltd Carbon Dioxide Detection Range Resolution 400~2000ppm 400~5000ppm 1ppm 400-10000ppm Table2 Detection range and accuracy Accuracy ± (50ppm+5% reading value) Appearance and structure:Pin type Positive pole of power (Vin) Negative pole of power (GND) HD(0 point calibration, low level lasting for over 7s is effective) UART(RXD)TTL Level data input UART(TXD)TTL Level data output Table 3 Email: [email protected]

Zhengzhou Winsen Electronics Technology Co., Ltd Terminal type: Table 4 Pin definition for terminal type Pin UART(TXD)TTL Level data output UART(RXD)TTL Level data input HD(Zero point calibration, low 7 level lasting for over 7s is effective) Cautions: 1．Please avoid the pressure of its optical chamber from any direction, during welding, installation, and use. 2．When placed in small space, the space should be well ventilated, especially for diffusion window. 3．The module should be away from heat, and avoid direct sunlight or other heat radiation. 4．The module should be calibrated termly, the...

Zhengzhou Winsen Electronics Technology Co., Ltd 9．When soldering with soldering iron, set the temperature to be (350 ± 5)℃, and soldering time must be within 3 seconds. 10．We suggest customers to use the way of soldering the socket and plugging/pulling the sensors for easier maintenance. 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 Zhengzhou Winsen Electronics Technology Co., Ltd Add: No.299, Jinsuo Road, National...