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Zhengzhou Winsen Electronics Technology Co., Ltd
www.winsen-sensor.com
Infrared CO2 Sensor Module
(Model: MH-Z19B)
User's Manual
(Version: 1.5)
Valid from: 2019.09.23
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!
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Summary of Contents for Winsen MH-Z19B
- Page 1 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Infrared CO2 Sensor Module (Model: MH-Z19B) User’s Manual (Version: 1.5) Valid from: 2019.09.23 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!
- Page 2 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.
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Page 3: Main Features
MH-Z19B NDIR CO2 Module 1. Profile MH-Z19B NDIR infrared gas module is a common type, small size sensor, using non-dispersive infrared (NDIR) principle to detect the existence of CO 2 in the air, with good selectivity, non-oxygen dependent and long life. - Page 4 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Terminal connection type: Unit: mm Pins connection type: Pins connection type: Pin Definition Positive pole of power (Vin) Negative pole of power (GND) Analog output(0.4~2V) HD(zero point calibration, low level lasting for over 7s is effective)
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Page 5: Main Parameters
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Terminal connection type: Terminal pin Definition Pin 1 Anolog Output Vo (0.4~2V) Pin 2 None Pin 3 Negtive Pole(GND) Pin 4 Positive Pole(Vin) Pin 5 UART(RXD)TTL Level data input UART(TXD)TTL Level data Pin 6... - Page 6 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com 7. Output PWM output Take 0~2000ppm for example CO2 output range 0~2000ppm Cycle 1004ms±5% Cycle start high level output 2ms(theoretical value) The middle cycle 1000ms±5% cycle end low level output 2ms(theoretical value) CO2 concentration: Cppm=2000×(TH-2ms)/(TH+TL-4ms)
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Page 7: Software Setting
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Software setting Set serial port baud rate be 9600, data bit 8 bytes, stop bit 1byte, parity bit null. Commands 0x86 Read CO2 concentration 0x87 Calibrate Zero Point (ZERO) 0x88 Calibrate Span Point (SPAN) -
Page 8: Zero Point Calibration
Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Note: Detection range should be 0~2000, 0~5000, or 0~10000ppm. For example: set 0~2000ppm detection range, send command: FF 01 99 00 00 00 07 D0 8F set 0~10000ppm detection range, send command: FF 01 99 00 00 00 27 10 2F Analog Voltage Output(Vo) Conversion between analog voltage output and concentration, take 0.4V~2V as an example:... - Page 9 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com Sending command method: Zero and Span point calibration can be achieved by sending a calibration command to the sensor via the serial port (URAT). Zero and SPAN point calibration commands are as follows:...
- Page 10 Zhengzhou Winsen Electronics Technology Co., Ltd www.winsen-sensor.com (400ppm) for over 20 minutes. Connect the HD pin to low level (0V) for over 7 seconds. 9.8 Forbid using wave soldering for the sensor. 9.9 When soldering with soldering iron, set the temperature to be (350 ± 5) °C, and soldering time must be within 3 seconds.
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