PM2.5 PM10 High Precision Air Particle Concentration Laser Dust Detection Sensor SDS011 Features: Accurate and Reliable: laser detection, stable, good consistency. Quick response: data update frequency 1Hz. Easy integration: serial output, built-in fan. High resolution: resolution of 0.3ug/m3. Convenient use, easy installation, and small volume. Specifications: Material: Plastic Condition: Weight: 60g Technical Parameters: NO. Item Parameter 1 Measuring output PM2.5, PM10 2 Range PM2.5: 0.0-999.9μg/m3 PM10: 0.0-1999.9μg/m3 3 Rated voltage 5V 4 Rated current 70mA±10mA 5 Sleep current <4mA 6 Temperature range Storage environment: -20℃ ~ +60℃ Operation environment: -10℃ ~ +50℃ 7 Humidity range Storage environment: Max.90% Operation environment: Max.70% 8 Working atmosphere pressure 86KPa ~ 110KPa 9 Response time 1s 10 Serial data output frequency 1Hz 11 Min. particle diameter resolution Less than 0.3um 12 Counting efficiency 70%@0.3μm 98%@0.5μm 13 Relative error ±15% and ±10μg/m3 maximum(25℃, 50%RH) 14 Power supply voltage 4.7~5.3V 15 Power supply power ≥1W（current ＞ 200mA） 16 Power supply voltage ripple ＜20mV 17 Product size Approx. 70 x 70 x 22mm / 2.75 x 2.75 x 0.86inch Interface specification: Pin Name Note 1 NC Empty 2 1um PM2.5: 0-999 PWM Output 3 5V 5V power input 4 2.5μm PM10: 0-999 PWM Output 5 GND GND 6 R Serial port receiver RX, TTL level @ 3.3V 7 T Serial port transmission TX, TTL level @ 3.3V Note: 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 ID byte 1  7 data 6 ID byte 2 8 checksum checksum 9 message trailer AB Checksum: data 1 + data 2 + ...+ data 6 PM2.5 data content: PM2.5 (um/m3) = ((PM2.5 high byte*256 ) + PM2.5 low byte)/10 PM10 data content: PM10 (um/m3) = ((PM10 high byte*256 ) + PM10 low byte)/10 The low byte and high byte of SN are the last four of the bar code on the sensor. PWM output: Output range: PM2.5: 0-999μg/m3, PM10: 0-999μg/m3 Cycle: 1004ms +1% High level output in start cycle: 2ms Middle cycle: 1000ms +1% Low level output in end cycle: 2ms Package List 1 x Laser Dust Sensor 1 x USB To TTL Module 1 x Cable Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.