SPECIFICATION Product Name: Laser Particle Sensor Module Item No.: PM2012 Version: V0.2 Date: April 20, 2020

Laser Particle Sensor Module PM2012 Applications ▪ Air purifier ▪ Air quality monitor ▪ Air conditioner ▪ Ventilation system ▪ Consumer electronic products Description PM2012 is a laser particle sensor module which uses light scattering principle. It measures and calculates the suspending particle number which is within unit volume on the air exactly and output particle mass concentration μg/m3 directly via mathematical algorithm and scientific calibration. ▪The smallest size of available measurement: 0.3μm ▪Real-time output particle mass concentration in μg/m3 available ▪High accuracy, high...

Internal Architecture Description According to the above figure, the light source part of PM2012 is composed of a laser tube and a driving circuit. The detection part of the sensor is composed of light sensitive part which receives reflected light and amplifying circuit. Data processing and communication output are completed by microprocessor. The gas flows into the module through the fan, when sampling particles pass through light beam (laser), there will be light scattering phenomenon, scattered light will be converted into electrical signal (pulse) via light sensitive part. Electrical signal...

Typical Application Circuit Case 1. UART Application

Temperature Influence Particle measured error: under 25±2℃, 50±10%RH, 0~1000μg/m³, consistency and accuracy of PM1.0/PM2.5 is ±10% reading or ±10μg/m³, whichever is larger (TSI-8530, Cigarette) Temperature influence coefficient: 0.5%/℃~1%/℃or 0.5μg/m³/℃~ 1μg/m³/℃, whichever is larger.

User Attention ▪It is for household electronics products. For application of medical, mining, disaster preparedness, which needs high security and high dependence, this sensor is not suitable. ▪ Please do not use it in bad dusty environment and close sampling port. ▪ Avoid using the sensor under situation with strong magnetic, such as situation close to stereo speaker, microwave oven, induction cooking. ▪When installing to system, make sure the inlet and outlet is unobstructed, and cannot be touched against by large air stream. There are two sides cannot be put downwards (As below pictures),...

▪The sensor itself is safe to use. What you should be cautious is the safety of power supply and structure design on the sensor. ▪This product is defined as 3R laser product according to 《GB7247.1-2012 laser product safety》 with laser radiation inside. Please avoid direct illumination on the eye. The warning label is as below.

1) The data in this protocol is all hexadecimal data. For example,“46” for decimal [70]. 2) [xx] is for single-byte data (unsigned, 0-255); for double data, high byte is in front of low byte. 3) Baud rate: 9600; Data Bits: 8; Stop Bits: 1; Parity: No 4) It is default by continuously mode after powering on. Working mode will not be saved after powering off. Sending format of software: 4.1 Read Particle Measurement Result

Send: 11 02 0B 07 DB Response: 16 35 0B DF1- DF52 [CS] Function: Read concentration of particle and particles number. Note: Read particle concentration (ug/m3) and particles number (pcs/0.1L) PM1.0 GRIMM mass concentration = DF1*256A3 + DF2*256A2 + DF3*256A1 + DF4 PM2.5 GRIMM mass concentration = DF5*256A3 + DF6*256A2 + DF7*256A1 + DF8 PM10 GRIMM mass concentration = DF9*256A3 + DF10*256A2 + DF11*256A1 + DF12 PM1.0 TSI mass concentration = DF13*256A3 + DF14*256A2 + DF15*256A1 + DF16 PM2.5 TSI mass concentration = DF17*256A3 + DF18*256A2 + DF19*256A1 + DF20 PM10 TSI mass concentration = DF21*256A3...

Response: 16 02 0C 02 DA//module is under particle measurement open status Send: 11 03 0C 01 1E C1 //close particle measurement Response: 16 02 0C 01 DB// module is under particle measurement closed status 4.3 Set up and Read Particle Measuring Time Send: 11 03 0D DF1 DF2 [CS] // set up particle measuring time Send: 11 01 0D E1 // read particle measuring time Response: 16 03 0D DF1 DF2 [CS] Function: Read particle measuring time Note: 1. Particle measuring time = DF1*256+DF2, unit is second. Minimum measuring time is 36 seconds. Time range is 36-65530 seconds. After setting up successfully, the...

4.5 Set up Dynamic Measuring Mode Send: 11 02 06 DF1 [CS] // Set up dynamic particle measuring mode Send: 11 01 06 E8 // Read dynamic particle measuring mode Response: 16 02 06 DF1 [CS] Function: Read/set up particle dynamic measuring mode Note: 1. Particle dynamic measuring mode result DF1. 2. When DF1=00, close dynamic measuring mode. When DF1=01, start dynamic measuring mode. Dynamic Working Mode Description: After sensors are in dynamic working mode, start measuring every 30s. The sensor starts the measurement for the first 3 seconds. After 3 seconds of measurement, the sensor starts measuring...

Send: 11 02 06 00 E7 // Set up closing dynamic particle measuring mode Response: 16 02 06 00 E2 // Set up successfully Remark: The module can support 4 kinds of working mode (Single+Continuous+Timing+Dynamic). It can be switched between these 4 kinds of working mode. It is continuous working mode by default after leaving factory. These 4 kinds of working mode can be switched by sending commands, as following: 1. Send: 11 03 0D 00 24 BB // Single measuring mode, time is 36s. After setting up successfully, the sensor will stop working first, then you can send “Open” command to start single 36s...

3. Instruction Communication Sequence 3.1 Host reads data continuously to the slave 4. IIC Address Setting: Slave address: 0x12 5 . Register Data Definition

After-Sales Services and Consultancy Cubic Sensor and Instrument Co.,Ltd. Tel: +86 (0)27 81628827 Fax: +86 (0)27 81628821 Add: Fenghuang No.3 Road, Fenghuang Industrial Park, Eastlake Hi-tech Development Zone, Wuhan 430205, China E-mail: [email protected]