Optical Particle Sensor for PM1 PM2.5 and PM10 OPC-N2 Model Number:OPC-N2 1.General Features * Micro USB socket allows on-site firmware updates * Onboard data logging using optional 16GB SD card: 12 months’ capture * SPI control of fan and laser for lowest power * Factory set: particle size particle density/Total RI bin weighting for respirable profiling Optical Particle Sensor for PM1 PM2.5 and PM10 OPC-N2Optical Particle Sensor for PM1 PM2.5 and PM10 OPC-N2 Optical Particle Sensor for PM1 PM2.5 and PM10 OPC-N2