Samplers

Designed to collect fine particulate matter and gases, the MASS400 Speciation PM 2.5 Sampler and MASS450 Speciation PM2.5 Sampler for Organics use annular denuders, 47mm filters and PUF samplers at a flow rate of 16.67 actual Lpm. These systems provide uncomplicated setup and sampling. The processes of configuration, data logging, sampling, and calibration are prompted through straightforward step-through windows. It displays graphics in a window style format on a large LCDC display screen. User settable intervals for average data and multi-point calibration of all sensors are incorporated, and the system can store up to 50 sample event summaries.

This microprocessor-based unit has a multiposition keypad and an adjustbale contrast LCD screen, battery equipped day/date clock, serial I/O port and digital to analog, analog to digital converter. Built-in data logging capabilities enable it to store up to three different types of data (summaries, interval averages log and power failure log). A 16.67 Lpm flow rate is maintained by a digitally encoded dry gas meter and a diaphragm vacuum pump. Calibration values can be archived and restored, providing backups in the event of bad calibration or firmware upgrades. Barometric pressure, meter drop pressure, ambient temperature, filter temperature, meter temperature, and inactive temperature are all measured by the control unit.

A hand-held data collection module downloads and retains sample summaries, interval data and power interruptions from the samplers. LED lights indicate power, memory status, (TX/RX) transmit/receiving data, fatal error, and nonfatal error.

URG, 116 S. Merritt Mill Road, Chapel Hill, NC 27516; phone: 919-942-2753; fax: 919-942-3522