Real Time Dust Monitor with Temperature & Humidity The MicroDustec 500X is the latest addition in the list of Environmental Monitoring Innovations by Instrumex. This is the most comprehensive dust monitoring solution that can measure dust particles as low as 0.3? upto 10?. Housed in an IP67 protected case, this unit is capable for outdoor continuous monitoring. Extremely portable & Light weight unit ensures maximum mobility. Available in 3 different models 5003, 5006 & 5009