PMSA003-A

Overview

Digital universal partical concentration sensor

PMSA003 series data manual

 High anti-interference performance because of the patent structure of six

sides shielding

 Optional direction of air inlet and outlet in order to adapt the different

design

 Smallest

PMSA003I is a kind of digital and universal particle concentration sensor,which can be used to obtain the number of suspended particles in the air,i.e.the concentration of particles,and output them in the form of digital interface. This sensor can be inserted into variable instruments related to the concentration of suspended particles in the air or other environmental improvement equipments to provide correct concentration data in time.

Figure 1 Functional block diagram of sensor

Parameter Index unit

standard ）

Note 1: Maximum range means that the highest output value of the PM2.5 standard data is not less than 1000. Note 2:“PM2.5 standard data” is the “data2” in the appendix.

引脚定义： Pin1----------VCC Pin2----------VCC Pin3----------GND Pin4----------GND Pin5----------Reset Pin6----------N/C Pin7----------RXD Pin8----------N/C Pin9----------TXD Pin10---------Set

Figure 2 Connector Definition

Mainly output as the quality and number of each particles with different size per unit volume, the unit volume of particle number is 0.1L and the unit of mass concentration is μg/m³. There are two options for digital output: passive and active. Default mode is active after power up. In this mode sensor would send serial data to the host automatically. The active mode is divided into two sub-modes:stable mode and fast mode. If the concentration change is small the sensor would run at stable mode with the real interval of 2.3s.And if the change is big the sensor would be changed to fast mode automatically with the interval of 200~800ms, the higher of the concentration, the shorter of the interval.

Definition of axis Y: PM2.5 concentration, unit: μg/m³ Definition of axis X: number of samples, unit: time

Figure 4-1 Consistency at 20 ℃

Figure 4-2 Consistency at 43 ℃

Figure 4-3 Consistency at -5 ℃

Figure 4-4 Consistency after 30 days running

Relationship of Temperature and Consistency

Figure 5 Consistency Vs Temperature

No Item Test Method Characteristics n C

n=10 C=0

cleaner

consistency

0~100 μ g/m ³ Maximum Error ≤

100~500 μ g/m ³ Maximum Error ≤ ± 10 % FAN does not

humidity 50% ， particle generator and air cleaner

screeched

5. Power varies as the cycles of 4.5V

to 5.5V ,then 5.5V to 4.5V with the pace of 0.1V/min for 2 hours.

6. Check consistency during

Variation

1. 10 ㎡ closed Lab, ， 20 ℃，

2. DC 5V power supply ， keep On-

Off frequency 0.5Hz for 72 hours and check consistency

50Hz for 240 hours and check consistency

1) DC 5V power supply is needed because the FAN should be driven by

5V. But the high level of data pin is 3.3V. Level conversion unit should be used if the power of host MCU is 5V.

2) The SET and RESET pins are pulled up inside so they should not be

connected if without usage.

3) PIN6 and PIN8 should not be connected. 4) Stable data should be got at least 30 seconds after the sensor wakeup

from the sleep mode because of the fan’s performance.

1) Metal shell is connected to the GND so be careful not to let it shorted

with the other parts of circuit except GND.

2) The best way of install is making the plane of inlet and outlet closely to

the plane of the host. Or some shield should be placed between inlet and outlet in order to prevent the air flow from inner loop.

3) The blowhole in the shell of the host should not be smaller than the inlet. 4) The sensor should not be installed in the air flow way of the air cleaner

or should be shielded by some structure.

5) The sensor should be installed at least 20cm higher than the grand in

order to prevent it from blocking by the flock dust.

6) When the sensor is used to outdoor fixed equipment, the equipment

should be completed for the protection of sandstorm,rain,snow,etc.

7) Do not break up the sensor. 8) The two screw holes can be used for positioning and fixing,For fixing

holes,the screw depth can reach 3.4mm,and the other shoule not exceed 1.9mm.

1) Only the consistency of all the PM sensors of PLANTOWER is promised

and ensured. And the sensor should not be checked with any third party equipment.

2) The sensor is usually used in the common indoor environment. So some

protection must be added if using in the conditions as followed: a) The time of concentration ≥ 300 μg/m³ is longer than 50% of the

whole year or concentration ≥ 500 μg/m³ i s longer than20% of the whole year.

b) Kitchen c) Water mist condition such as bathroom or hot spring. d) Outdoor

Frame length low 8

bits

Data 1 high 8 bits …… Data 1 refers to PM1.0 concentration unit μ g/m3 （ CF=1 ， standard particle ） * Data 1 low 8 bits ……

Data 2 high 8 bits …… Data 2 refers to PM2.5 concentration unit μ g/m3 （ CF=1 ， standard particle ） Data 2 low 8 bits ……

Data 3 high 8 bits …… Data 3 refers to PM10 concentration unit μ g/m3 （ CF=1 ， standard particle ）

Data 3 low 8 bits ……

Data 4 high 8 bits …… Data 4 refers to PM1.0 concentration unit * μ g/m3 （ under atmospheric environment ）

Data 4 low 8 bits ……

Data 5 high 8 bits …… Data 5 refers to PM2.5 concentration unit μ g/m3 （ under atmospheric environment ）

Data 5 low 8 bits ……

Data 6 high 8 bits ……. Data 6 refers to concentration unit (under atmospheric environment) μ g/m3 Data 6 low 8 bits ……

Data 7 high 8 bits …… Data 7 indicates the number of particles with diameter beyond 0.3 um in 0.1 L of air. Data 7 low 8 bits ……

Data 8 high 8 bits …… Data 8 indicates the number of particles with diameter beyond 0.5 um in 0.1 L of air. Data 8 low 8 bits ……

Data 9 high 8 bits …… Data 9 indicates the number of particles with diameter beyond 1.0 um in 0.1 L of air. Data 9 low 8 bits ……

Data 12 high 8 bits …… Data 12 indicates the number of particles with diameter beyond 10 um in 0.1 L of air. Data 12 low 8 bits ……

Data 13 high 8 bits …… Version

Data and check high 8 bits

…… Check code=Start character 1+ Start character 2+……..+data 13 Low 8 bits Data and check low 8 bits

Default baud rate ： 9600bps Check bit ： None Stop bit ： 1 bit

Host Protocol

0xe2 X X Read in passive mode

0xe1 X 00H-passive 01H-active

Change mode

0xe4 X 00H-sleep 01H-wakeup

Sleep set

0xe2: 32bytes , same as appendix I

Add of all the bytes except verify bytes.