Laser Dust Module （Model No.: ZH03B） Manual Version: 2.1 Valid from: 2019-04-15 Zhengzhou Winsen Electronics Technology Co., Lt

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 using 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 ZH03B Laser Dust Sensor Module Profile Laser Dust sensor module is a common type, small size sensor, using laser scattering principle to detect the dust particles in air, with good selectivity and stability. It is easy to use, with serial port output & PWM output. Features Good consistency, Real time response Accurate data, Low power consumption Minus resolution of particle diameter 0.3 µm Main Applications It’s widely used in air purifiers, ventilation systems, portable instrument, air quality monitoring equipment, air conditioner, and smart home...

Zhengzhou Winsen Electronics Technology Co., Ltd Outlet(fan) Inlet Serial port receive [email protected] Serial port send [email protected] Communication Protocol 1. General Settings Baud rate Date byte Stop byte Check byte Email: [email protected] Leading gas sensing solutions supplier in China!

Zhengzhou Winsen Electronics Technology Co., Ltd Frame length high 8 bits low 8 bits high 8 bits low 8 bits high 8 bits low 8 bits Initiative upload check = byte1+……+byte 22 NOTE: 1. The default communication mode is initiative uploading mode. 2. Take an example to explain calculate method: Receiving the following data frames: No. Check value= 0x42+0x4D+0x00+0x14+0x00+0x54+0x00+0x6E+0x00+0x7C+0x00+0x54+0x00+0x6E+0x00 +0x7C+0x00+0x00+0x00+0x00+0x00+0x00 = 0x031F High 8 bits 0x03 is in 23th byte of data frame, low 8 bits 0x1F is in 24th byte of data frame. PM1.0 value=0x00*256+0x54=84ug/m3 PM2.5...

Zhengzhou Winsen Electronics Technology Co., Ltd 3. Question & answer mode (Q&A mode) Send the command: 0 Starting byte Check value Return value as follow: 0 Note: The Q&A data frame check value calculation method is different from the method of initiative uploading the data frame. Please refer to the Q&A check value calculation example. 4. Switch between Q&A mode and Initiative uploading mode Send command to set Q&A mode: 0 Starting byte Check value Send command to set initiative uploading mode: 0 Starting byte Check value 5. Dormant mode. Send command to set dormant mode: 0 Starting byte Main...

Zhengzhou Winsen Electronics Technology Co., Ltd Calculate method for check value under Q&A mode: How to calculate under Q&A mode: If the returning data as follow: 0 Email: [email protected] Leading gas sensing solutions supplier

Zhengzhou Winsen Electronics Technology Co., Ltd To calculate PM2.5 concentration through PWM: P (ug/m3)=1000x(TH)/(TH+TL) P (ug/m3) is calculated value of PM2.5 concentration, its unit is ug/m3 TH is the time of high level during one period TL is the time of low level during one period PWM signal instruction Detection Range PM2.5 concentration output range High level output at the period start Low level output at the period end NOTE: PWM signal output has PM2.5 value only. Email: [email protected] Leading gas sensing solutions supplier in China!

Zhengzhou Winsen Electronics Technology Co., Ltd Working Principle: Detection area Circuit Calculation Concentration output Email: [email protected] Leading gas sensing solutions supplier in China!

Zhengzhou Winsen Electronics Technology Co., Ltd Installation way: Air inlet hole requests good ventilation. The fan is at the place of air outlet. When the module is installed or used, please avoid strong air flow; if the strong air flow can’t be avoided, please make the outside flow direction is vertical to inside flow direction. Instruction for air flow directions Email: [email protected] Leading gas sensing solutions supplier in China!

Zhengzhou Winsen Electronics Technology Co., Ltd Cautions: 1. It is forbidden to disassemble the shield cover of the sensor and the fixing screw on the sensor. The sensor shield is connected to the internal power supply through internal spring, if the sensor shield is removed, the anti-interference ability of the sensor will be deteriorated and sensors’ output value will jump leading that performance is degraded. It is also important to note that the sensor's metal shield should be protected from contacting with other external circuits or conductive components, to reduce the effects of external...