The Triplett Model EPC370 Mini Particle Counter is a device that is designed to measure, monitor, and identify particles of any substance in a given volume of media such as air, water, and other chemicals. This unit displays particle count or concentration (PM2.5/PM10), air temperature and relative humidity on the 2 in. color display (220 x 176). This unit features a six level analog color bargraph (green, yellow, orange, red, purple, maroon) and displays real-time PM2.5 level. The EPC370 is capable of storing up to 5000 data sets (PM2.5, PM10, temperature, humidity, date and time) which is stored by date and time. In addition, this unit has a user selectable sampling rate of 30 seconds, 1, 2, and 5 minutes. A PM2.5 alarm with disable starts at >35ug/m3 and increases as the level gets higher. Particle Counters are typically used for IAQ (indoor air quality) testing and they work by counting and sizing the number of particles in the air. This can help determine the air quality level in a building or industrial work environment. This unit is optimal for industries including semi-conductors, pharmaceuticals, data centers, optics, aerospace, cleanrooms, operating rooms and other sensitive applications.