This Portable Air Quality Monitor is equippe with real time data logging feature. This product comes in handy for indoor air quaity analysis job in commercial and residential buildings. Known for its automatic operation, this monitor is remote control regulated. It has auto diagnosis function, suction or diffusion sampling arrangement and standard safety features. This Portable Air Quality Monitor can work with maximum four sensors at the same time. This machine is capable of monitoring and recordin PM10 or PM 2.5 particulate matter simultaneously.