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Laser Particle Sensor-PM2008

Laser Particle Sensor-PM2008
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Product Name: Laser Particle Sensor Module Item No.: PM2008 Version: V0.2 Date: December 29, 2018

Laser Particle Sensor Module PM2008 Applications ▪ Air purifier ▪ Air quality monitor ▪ Air conditioner ▪ Ventilation system ▪ Consumer electronic products ▪ Environmental monitoring Description PM2008 laser particle sensor module is based on laser scattering technology, designed with all metal shielding, ultra-thin (12mm) which is used to detect particle concentration size between 0.3μ-10μm exactly in the air and real-time output PM1.0, PM2.5, PM10 in μg/m3 directly via mathematical algorithm and scientific calibration. ▪ The smallest size of available measurement: 0.3μm ▪ Real-time output...

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Drive Ctrcui: Dust flow Drive Circuit Amplifier Circuit When the fan works, it will generate airflow. When the particles in the sampled gas pass through the beam of the light source (laser), a light scattering phenomenon occurs, and the scattered light is converted into an electrical signal (ie, a pulse) by the photoelectric converter. The larger the particle size, the larger the amplitude of the pulse signal output. The number of particles of different sizes is calculated by comparing the peak value with the predetermined threshold value, and the mass concentration value is obtained by a...

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3. Connector and Cables (Connector can be customized)

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Typical Application Circuit Case 1. UART Application Note of Circuit Design ▪ UART and I²C communication is compatibility with 3.3V and 5V level. ▪ There is pull-up resistor inside the SET and RESET. No matter there is signal input or not, these two pins will work normally. If they are not useful for you, keep it floating. ▪ PIN1 is the pin for manufacturer testing, you can keep it floating. ▪ The power supply of sensor should be 5V and low noise, please refer to table 1 for detail

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£rror Temperature Influence Cuive for Measured Value under Particle Concentrtaion of 250ug/m3 » TUff ernjf Measurement error increases 0 5% when temperature nse or fall ITT Particle measured error: under 25±2C, 0~1,000 pg/m3, consistency and accuracy of PM1.0/PM2.5 is either ±15% reading or ±15pg/m3, the bigger one is considered. Temperature influence coefficient: 0.5%/C ~ 1%/C or 0.5 pg/m3/C ~ 1pg/m3/C, the bigger one is considered.

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Product Installation When install PM2008 sensor module in your system or equipment, please make sure that the air inlet and air outlet are unobstructed. And there is no huge airflow face to air inlet and air outlet. In order to avoid dust deposition on th e surface of sensitive component (laser diode and photosensitive diode) which may affect the measurement accuracy, the appropriate installation ways are recommended as below. Recommended installation Cross section Non-Recommended installation Laser Diode Surface Photosensitive Diode Surface

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User Attention ▪Metal case conducts with GND of internal power supply. Don’t short-circuit with other external circuit or shell. ▪The best installation way is to make the surface of air inlet and outlet of the sensor clings to the air vent in the inner wall of the user device that communicates with the outside. If it's not possible, then an air isolation structure between air inlet and air outlet is necessary to avoid the air back flow in the user's device. ▪Air vent on the internal wall of user’s device for airflow should be bigger than the size of air inlet of the sensor. ▪For...

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▪If isolated switch power supply is adopted to obtain DC power, please control the capacitance between the DC ground and the AC ground below 2.2nF and withstand voltage reaches to 3KV. ▪It is defined as 3R laser product according to《GB7247.1-2012 laser product safety with laser radiation inside》. Please avoid direct exposure to your eyes. Warning sign is as below.

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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 continuous mode after powering on. Working mode will not be saved after powering off. Sending format of software:

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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 +...

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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 36-65535 seconds. After setting up successfully,...

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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...

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