Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.
com
Infrared CO2 Sensor Module
(Model: MH-Z1311A)
User’s Manual
(Version 1.4)
Issue Date. 2023.04.17
Zhengzhou Winsen Electronics Technology Co., Ltd
ISO9001 Certificated Company
Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com
Statement
This manual’s 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.
Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com
MH-Z1311A NDIR CO2 Module
Profile
MH-Z1311A carbon dioxide gas sensor (hereinafter referred to
as the sensor) is a general-purpose, small-scale sensor that uses
the principle of non-dispersive infrared (NDIR) to detect CO2 in
the air. It has good selectivity, no oxygen dependence, and long
life. , Built-in temperature compensation, digital output, easy to
use. The sensor is a high-performance sensor made by closely
combining mature infrared absorption gas detection technology
with precise optical circuit design and sophisticated circuit
design.
Applications
*HVAC refrigeration *Air cleaner device *Indoor air quality monitoring
*Smart home *Ventilation system
Main Features
*The air chamber adopts electroplating treatment, waterproof and anti-corrosion
*High sensitivity, low power consumption
*Excellent stability
*Temperature compensation, excellent linear output
*Provide serial port (UART) output mode
*Long lifespan
*Anti-water vapor interference, anti-poisoning
Main parameters
Model No. MH-Z1311A
Detection Gas CO2
Working voltage 5.0±0.1V DC
Average current 150uA (@5V power supply)
90mA (@5V power supply, 1s
Peak current
measurement interval)
Interface level 3.3 V (Compatible with 5V)
Detection Range 0~10000ppm(optional)
Output signal Serial Port (UART) (TTL level 3.3V)
Preheat time 10s
Response Time T90 < 60 s
Working temperature -10 ~ 50 ℃
Working humidity 0 ~ 95% RH (No condensation)
Weight 5g
Lifespan > 10 years
Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com
Detection range and accuracy
Detection Gas Formula Detection Range Resolution Accuracy
Carbon CO2 0~2000ppm 1ppm ± (30ppm+3% reading value)(15~35℃)
Dioxide 0~5000ppm ± (10% reading value)(-10~15℃, 35~50℃)
0~10000ppm
Dimensions
Pins connection type:
Pin Pin Definition
Pin 1,2,5-7 Reserved
Pin 3 UART（TXD） 0～3.3 V data output
Pin 4 UART（RXD） 0～3.3 V data input
Pin 8 GND
Pin 9 VIN
Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com
Notes
● During the process of welding, installation, and use of the sensor, the optical cavity of the sensor should be
prevented from being subjected to pressure in any direction.
●If the sensor needs to be placed in a small space, this space should be well ventilated, especially the air intake
window should be in a well-ventilated location..
●The sensor should be far away from heat sources, and avoid direct sunlight or other heat radiation.
●The module should be calibrated termly, the suggested period is not longer than 6 months.
●Do not use the sensor for a long time in an environment with high dust density.
●To ensure that the sensor can work normally, the power supply voltage must be kept in the range of DC (5.0±
0.1)V, and the power supply current must not be less than 150mA. If it is not within this range, the sensor may
malfunction, the sensor output concentration is low or the sensor cannot normal work.
● When manually calibrating the zero point or sending a command to calibrate the zero point, you must work
continuously for more than 20 minutes in a stable gas environment (400ppm).
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: sales@winsensor.com
Website: www.winsen-sensor.com
Tel: 86-371-67169097/67169670 Fax: 86-371-60932988 Email: sales@winsensor.com
Leading gas sensing solutions supplier in China!
