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MET ONE-BAM1020

Peng Zhao's profile picture
Peng Zhao
Posts: 128

02 June 2023, 10:42 AM

Met One Instruments’ Model BAM 1020 was the first instrument to obtain U.S. EPA Federal Equivalent Method (FEM) designation for continuous PM2.5 monitoring and its longstanding EPA designation for PM10 monitoring. The BAM 1020 has also obtained the corresponding PM2.5 and PM10 certifications in the European Union. Two BAM 1020 units can also be operated as an EPA-designated PM10–2.5 coarse method. Met One Instruments supplies complete sampling accessory kits for compliance with each designation.

Operation

At the beginning of each sample hour, a small 14C (carbon-14) source emits a constant source of high-energy electrons (known as beta rays) through a spot of clean filter tape. A sensitive scintillation detector detects and counts these beta rays to determine a zero reading. The BAM 1020 then advances this spot of tape to the sample nozzle, where a vacuum pump pulls a measured and controlled amount of outside air through the filter tape, loading it with ambient dust. At the end of the sample hour, this dust spot is placed back between the beta source and the detector, thereby causing attenuation of the beta ray signal, which is used to determine the mass of the particulate matter on the filter tape. This mass calculates the volumetric concentration of particulate matter in ambient air.

Data collection

All data files are accessible via an industry-standard duplex RS-232 serial port using common terminal programs or Met One Instruments software such as Air Plus® or Comet®. The data is available in various formats, including daily reports, the last record, all data, and new records since the last download. Configuration files, error logs, and flow statistics are also available. Ethernet and USB data collection are standard.

Features

  • U.S. EPA Equivalent Method for PM2.5 Monitoring
  • Long-term unattended remote operation of up to 60 days between site visits
  • Low operating costs
  • Automatic Span Calibration checks
  • Fast and easy field audits using common FRM audit tools
  • Benchtop or equipment rack mounting in mobile or stationary shelters
  • Rugged anodized aluminium, stainless steel, and baked enamel construction
  • Highly accurate, reliable, and mechanically simple flow system
  • Hourly filter advances minimize effects on volatile compounds
  • Advanced Smart Heater technology precisely controls sample relative humidity
  • Integrated data logger allows the connection of up to two multi-parameter meteorological sensors
  • Data retrieval through RS-232 or RS-485 serial ports using direct PC connections, or digital data collection systems

Standard equipment

  • Operation Manual and Quick Setup Guide
  • Internal Automatic Span Membrane
  • Internal Flow Sensor and Flow Controller
  • Internal Filter Temperature, Pressure, and Relative Humidity Sensors
  • Six-Channel Data Logger for Accessory Sensors
  • Serial Data Cable and Modular Power Cable
  • Pump Control Cable and Air Tubing
  • Rack Mounting Brackets and Hardware
  • COMET® Data Collection Software
  • One Roll of 460180 Glass Fiber Filter Tape
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