PM 2.5

This microprocessor-controlled air sampling pump is designated specifically for PM10 sampling. The unit will operate from its internal battery for 24 hours, but an auxiliary, easily interchangeable battery greatly extends run time. The built in software permits programming of start and run time as required. Air flow is rigidly controlled to ±2% precision with state-of-the art mass flow sensor. All relevant operations information such as date, time, flow rate and total flow are displayed. An RS232 port affords downloading of information plus remote access. During the data transfer, relevant data such as station number, job code and operator name may be entered. After filter analysis, the filter weight change may be entered and the system automatically calculates the air concentration corrected to EPA standard conditions. The real time clock permits sample start at any future time.

TSP Sampling Sampling for Total Suspended Particulates is no longer the National Standard, but, it is still widely used at the state level and for lead sampling. The former standard defined TSP particulates as those aerosols being drawn into an inlet whose velocity was equivalent to the sedimentation velocity of a 100mm AED particles (24.8 cm/sec). The PQ100 may be used as a TSP sampler by mounting the filter holder (F20) directly onto the pump, fitting the TSP cap onto the filter holder and operating the pump at 16.7 lpm.

Calibration When using a specific filter and flow rate (i.e. 47mm Teflo at 16.7 lpm) this calibration will be maintained in memory indefinitely. However, calibration should be checked on a yearly basis. Two hundred and forty calibration locations (from 1.0 to 25.0 in 0.1 lpm increments) can be programmed into this unit. When you calibrate the above flow rate/filter, and should you choose to correct for engineering standard conditions (760mm Hg at 20C), then every sample you run thereafter at 16.7 lpm using the 47mm Teflo will also remain constant.

The finest samplers deserve the finest calibrators. The BGI deltaCal and triCal are NIST traceable and the only electronic devices usable down to -30 C.

Downloading The data from the PQ100 may be downloaded to any IBM type computer system (5.25 and 3.5 floppy disks are provided). Any IBM compatible PC running MS-DOS 2.1 or higher with 1 floppy drive and at least 512K of memory is usable. One serial communication port is also required. The HP100LX palmtop computer is also usable with our accessory memory card and adaptor cable. The software also includes a corrections program which simplifies calculating the flow rate to EPA standards. After filter analysis, the downloaded information may be reaccessed and the program will automatically calculate the concentration to EPA standard conditions of 760mm of Hg and 25C.

Solar Panel
The BGI Solar Panel accessory for the PQ200 will be extend its operational time range from 24 hours to an indefinite period depending upon the amount of ambient sunlight available in the region of use. As a practical matter the panel with the ballast battery will provide a minimum of 10-14 days of operation with only minimum ambient light. When interval sampling on three or six day cycles is contemplated continuous operations far from a source of power are achievable.