Zhengzhou Winsen Electronics Technology Co., Ltd

www.winsen-sensor.com

Tel: 86-371-67169097/67169670 Fax: 86-371-60932988

Email: sales@winsensor.com

Leading gas sensing solutions supplier in China!

0x9A

0x00

0x02

0xFD

0x00

0x28

0x00

0x28

0x00

Byte18

Byte19

Byte20

Byte21

Byte22

Byte23

Byte24

Byte25

CO

O3

NO2

Reserved Reserved

Check

sum

0x05

0x00

0x20

0x00

0x50

0x00

0x00

0xEA

Note:

Item

Unit

Concentration

PM1.0

Ug/m3

(Byte2*256+Byte3)ug/m3= 101ug/m3

PM2.5

Ug/m3

(Byte4*256+Byte5)ug/m3= 54ug/m3

PM10

Ug/m3

(Byte6*256+Byte7)ug/m3= 150ug/m3

CO2

ppm

(Byte8*256+Byte9)ppm=410ppm

VOC

0~3 grade

Temperature

0.1℃

((Byte11*256+Byte12)-500)*0.1℃=26.5℃

For example: byte11=0x01, byte12=0x59

((Byte11*256+Byte12)-500)*0.1℃=-15.5℃

Humidity

%RH

(Byte13*256+Byte14)%RH=40%RH

CH2O

0.001mg/m3

(Byte15*256+Byte16)*0.001mg/m3=0.040mg/m3

CO

0.1ppm

(Byte17*256+Byte18)*0.1ppm=0.5ppm

O3

0.01ppm

(Byte19*256+Byte20)*0.01ppm=0.32ppm

NO2

0.01ppm

(Byte21*256+Byte22)*0.01ppm=0.80ppm

3. Checksum calculation

Check value=(invert( Byte1+Byte2+...+Byte7/Byte24))+1

Note:

1. PM2.5 sensor collection hole is the internal airflow inlet, which needs to maintain good contact with the

outside air; the fan installation position is the internal airflow outlet of the sensor. When the sensor is installed,

please avoid strong airflow around the sensor; if it cannot be avoided, try to keep the direction of the external

airflow perpendicular to the direction of the internal airflow of the sensor.

2. When designing the detection chamber of the whole detector, the effective area of the PM2.5 sensor

sampling port must be fully considered to ensure the smoothness of the sampling gas path as much as possible.

A small sampling area and excessive air resistance will seriously affect the accuracy of the sensor data.

3. Excessive impact or vibration will affect the sensor accuracy and life span, so the sensor should be protected

from falling or vibration during installation and use.

4. The PM2.5 sensor on this module is suitable for the detection of dust particles in ordinary indoor

environments. The actual use environment should try to avoid soot environment, excessive dust particles, high

humidity environment, such as: kitchen, bathroom, smoking room, outdoor, etc. If used in such an environment,

appropriate protective measures should be added to prevent viscous particles or large particles from entering

the sensor, forming a buildup inside the sensor, and affecting the sensor's performance.

5. The module should avoid contact with organic solvents (including silica gel and other adhesives), coatings,

pharmaceuticals, oils and high-concentration gases.