Overview:

The SDS011 using principle of laser scattering,can get the particle concentration between 0.3 to 10um in the air.
It with digital output and built-in fan is stable and reliable.

Characteristics:

1. Accurate and Reliable: laser detection, stable, good consistency;
2. Quick response: response time is less than 10 seconds when the scene changes;
3. Easy integration: UART output (or IO output can be customized), fan built-in;
4. High resolution: resolution of 0.3ug/m3.

Scope of application:

PM2.5 Detector
Purifier
Air Exchangers
Filtering system

Working principle:

Using laser scattering principle:
Light scattering can be induced when particles go through the detecting area.
The scattered light is transformed into electrical signals and these signals will be amplified and processed.
The number and diameter of particles can be obtained by analysis because the signal waveform has certain relations with the particles diameter.

Technical Parameters:

No.	Item	Parameter
1	Measuring output	PM2.5,PM10
2	Range	0.0-999.9 ug/m3
3	Power supply voltage	5V
4	Maximum working current	100mA
5	Sleep current	2 mA
6	Operating temperature range	-20-50℃
7	Response time	1s
8	Serial data output frequency	1 time/s
9	Particle diameter resolution	Less than 0.3um
10	Relative error	10%
11	Product size	71x70x23mm

Interface specification:

Pin	Name	explain
1	CTL	Control pin, reserved
2	1um	>0.3 Micron particle concentration, PWM Output
3	5V	5V power input
4	25um	>2.5 Micron particle concentration, PWM Output
5	GND	GND
6	R	Serial port receiver RX
7	T	Serial port transmission TX

PS: The pitch of Interface is 2.54mm

Communication protocol:

Serial communication protocol: 9600 8N1. (Rate of 9600, data bits 8, parity none, stop bits 1)
Serial report communication cycle: 1+0.5 seconds
Data frame (10 bytes): message header + order+ data(6 bytes) + checksum + message trailer

The number of bytes	Name	Content
0	message header	AA
1	order	C0
2	data 1	PM2.5 low byte
3	data 2	PM2.5 high byte
4	data 3	PM10 low byte
5	data 4	PM10 high byte
6	data 5	0(reserved)
7	data 6	0(reserved)
8	checksum	checksum
9	message trailer	AB

Checksum: data 1 + data 2 + …+ data 6
PM2.5 data content: PM2.5 (ug/m3) = ((PM2.5 high byte*256 ) + PM2.5 low byte)/10
PM10 data content: PM10 (ug/m3) = ((PM10 high byte*256 ) + PM10 low byte)/10

Package included:

1 x Nova PM Sensor SDS011 High Precision Laser PM2.5 Air Quality Detection Sensor Module