The Aerocet 532 is a handheld particle monitor from Met One Instruments, Inc. It features a full-color 2.8″ TFT LCD display for easy measurement readings and operation. The monitor measures both particle mass and count and includes PM1, PM2.5, PM4, PM7, PM10, and total suspended particulate (TSP) measurements. The Aerocet 532 has an 8-channel particle counter with a range of 0.3 to 10 microns and a proprietary algorithm for typical-density aerosols, with user-programmable K factors for special particulate densities. The device has an internal battery life of 8 hours, can store over 15,000 records, and has USB connectivity for easy data transfer. It also includes an integrated relative humidity and temperature sensor, a streamlined user interface, and a user manual, isokinetic sample inlet, EVA carrying case, USB cable, zero particulate filter, calibration certificate, RH & temperature probe, and AC adapter/battery charger.