Winsen MH-Z1911A Infrared CO2 Sensor User Manual
- June 16, 2024
- Winsen
Table of Contents
Winsen MH-Z1911A Infrared CO2 Sensor
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.
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.
Profile
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.
Features:
- High sensitivity, low power consumption
- Good stability and consistency
- Temperature compensation, excellent linear output
- Multiple output modes: UART, PWM
- Long lifespan
- Anti-water vapor interference, anti-poisoning
Applications:
- HVAC system
- Air purifier
- Indoor air quality monitor
- Smart home device
- Consumer CO2 meter
Main parameters:
| Model No. | MH-Z1911A | Preheat time | 1 min |
|---|---|---|---|
| Detection Gas | CO2 | Response Time | T90 < 120 s |
Working
voltage
| DC 5.0±0.1V| Working
temperature
| -10 ~ 50 ℃
Average
current
| < 30mA (@5V power
supply)
| Working humidity| 0~95%RH(No condensation)
Peak current| 125mA (@5V power
supply)
| Storage
temperature
| -20~60 ℃
Interface level| 3.3 V (Compatible with 5V)| Weight| 5 g
Output signal
| Serial Port (UART) (TTL
level 3.3V)
| Detection Range| 400~10000ppm(optional,see
table2.)
PWM| Lifespan| > 10 years
Detection Gas| Formula| Detection Range| Resolution| Accuracy
---|---|---|---|---
Carbon Dioxide
|
CO2
| 400~2000ppm|
1ppm
|
± (50ppm+5% reading value)
400~5000ppm
400-10000ppm
Appearance and structure:
Pin Definition:
Cautions:
- Please avoid the pressure of its optical chamber from any direction, during welding, installation, and use.
- When placed in small space, the space should be well ventilated, especially for diffusion window.
- The module should be away from heat, and avoid direct sunlight or other heat radiation.
- The module should be calibrated termly, the suggested period is no longer than 6 months.
- Do not use the sensor in the high dusty environment for long time.
- To ensure the normal work, the power supply must be among 5.0V±0.1V DC rang, the power current must be not less than 150mA. Out of this range, it will result in the failure of the sensor. (The concentration output is low, or the sensor cannot work normally.)
- During the zero-point calibration procedure by manual or sending command, the sensor must work in stable gas environment (400ppm) for over 20 minutes.
- Forbid using wave soldering for the sensor.
- When soldering with soldering iron, set the temperature to be (350±5)℃, and soldering time must be within 3 seconds.
- 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:sales@winsensor.com
Website:www.winsen-sensor.com
References
Read User Manual Online (PDF format)
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