PMS9103M

Overview

Table 1 PMS9103M Technical Parameters

 Laser scattering principle Correct data PMS9103M 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 produce scattering by using laser to radiate suspending particles in the air, then collect scattering light in a certain degree, and finally obtain the curve of scattering light change with time.

 Maximum range means that the highest output value of the PM2.5 standard data is not less than 1000.  “PM2.5 standard data” is the “data2” in the appendix A.20℃,50%. Laser scattering principle is used for such sensor, i.e. In the end, equivalent particle diameter and the

number of particles with different diameter per unit volume can be calculated by microprocessor based on MIE theory. Please find the functional diagram

Figure 2 Connector Definition

Table 2 Digital interface pin definition

Set pin/TTL level @3.3V, high level or suspending is normal working status, while low level is sleeping mode.

Figure 3 Typical Circuit

 Circuit Attentions

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) PIN7 and PIN8 should not be connected.

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

Figure 4-3 Consistency at -5℃ 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.

PM2.5 Concentration (Data 2 in Appendix A)

 Definition of axis Y:unit µg/m³

 Definition of axis X:unit times

Figure 4-4 Consistency after 30 days running

Figure 4-1 Consistency at 20℃

Figure 4-5 Consistency Vs Temperature

Sample No. ： N

No. Item Test Method Characteristics

Defective ： C

1 Long Running 30 m³ closed Lab,20~30℃ ， humidity 30%~70% ， particle

generator and air cleaner Check consistency after 720 hours’ running

2 Vibration 1. DC 5V power supply and check consistency

At 70℃, the sensor works continuously for 72 hours, and

then returns to the normal temperature25±5℃ for 2 hours N=10 ， C=0

Operation

Low Temperature

At -10℃, the sensor works continuously for 72 hours, and

then returns to the normal temperature25±5℃ for 2hours N=10 ， C=0

Maximum

High

In the 3m³closed laboratory chamber, PM2.5

Error≤±10μg/m³

Concentration

concentration remained stable above 1000ug, and the

Environmental

consistency was detected after the sensor was placed in

Test

the laboratory chamber for 240 hours

High Temperature

60℃±2℃,humidity 90%~95% , storage 48 hours, Check

Error≤±10%;

and Humidity consistency after 2hours’ room temperature25±5℃

Storage

storage screeched

-20℃±2℃, storage 72 hours, Check consistency after 2

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. Check

consistency during Variation

Power On-Off

DC 5V power supply ， keep On-Off frequency 0.5Hz for for inspection and determination .

Min distinguishable 0.3 μm

Version code

Sensor type ： PMS- Particulate Matter Sensor

Figure 5 Physical size(Unit:mm)

a) Metal shell is connected to the GND so be careful not to let it shorted with the other parts of circuit except GND.

b) 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. c) The blowhole in the shell of the host should not be smaller than the inlet.

d) The sensor should not be installed in the air flow way of the air cleaner or should be shielded by some structure.

e) The sensor should be installed at least 20cm higher than the grand in order to prevent it from blocking by the flock dust.

f) When the sensor is used to outdoor fixed equipment, the equipment should be completed for the protection of sandstorm,rain,snow,etc. g) Do not break up the sensor.

a) 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.

b) The sensor is usually used in the common indoor environment. So some protection must be added if using in the conditions as followed:

i. The time of concentration ≥300μg/m³ is longer than 50% of the whole year or concentration≥500μg/m³ is longer than20% of the whole year. ii. Kitchen iii. Water mist condition such as bathroom or hot spring. iv. Outdoor

Definition Note

Start character 1 0x42

Start character 2 0x4D

Frame length high 8 bits …… Frame length=2x13+2(data+check bytes) standard particle ） * Data 1 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 5 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 11 high 8 bits …… Data 11 indicates the number of particles with diameter beyond 5 um in 0.1 L of air. Data 11 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 low 8 bits …… Error code

Data and check high 8

…… Check code=Start character 1+ Start character 2+……..+data 13 low 8 bits bits

Data and check low 8

Start Byte 1 Start Byte 2 Command Data 1 Data 2 Verify Byte 1

Verify Byte 2

a) 0xE2: 32bytes , same as appendix A b) 0xE1:

Start Byte

Frame length2 Command Data Verify

Verify length1

Byte 1

Byte 2

0x42 0x4D 0x00 0x04 0xE4 Sleep

/wakeup LRCH LRCL

Modification History Form

Sensor Label Added

Physical Size Updated Dimensional Tolerance

1.4 2021/12/31 6 Packaging Information Changed