- APDA-371 - Ambient Dust Monitor

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HORIBA - APDA-371 - Ambient Dust Monitor

The APDA-371 automatically measures and records airborne particulate concentration levels (in milligrams or micrograms per cubic meter), using the industry-proven principle of beta ray attenuation. Thousands of this Dust Analyzer units are currently deployed worldwide, making the unit one of the most successful air monitoring platforms in the world.

Particulate matter contaminates our atmosphere in various ways. It can for instance be generated by different industrial production processes,waste combustion, coal mining or automobile exhausts. The APDA-371 automatically measures and records airborne particulate concentration levels (in milligrams or micrograms per cubic meter), using the industry-proven principle of beta ray attenuation. Each hour, a small carbon-14 element emits a constant source of high-energy electrons (known as beta rays) through a spot of clean fillter tape. These beta rays are detected and counted by a sensitive scintillation detector to determine a zero reading. The APDA-371 automatically advances this spot of tape to the sample nozzle, where a vacuum pump then pulls a measured and controlled amount of dust-loaded air through the !lter tape. Hourly this dirty spot is placed back between the beta source and the detector thereby causing an attenuation of the beta ray signal which is used to determine the mass of the particulate matter on the filter tape.

The APDA-371 Air Pollution Dust Analyzer for Suspended Particulate Matter (SPM) ensures long term stability and self-diagnostic capabilities as well as efficient collection of fluorine resin tape. The measurement principle operates according to EU and EPA regulations and is also type approved by TueV.

Functions:

The HORIBA Model APDA-371 has longstanding EN & U.S. EPA designation as a Federal Equivalent Method (FEM) for continuous PM 10 particulate monitoring. In addition, the APDA-371 is the world's first instrument to obtain U.S. EPA FEM designation for continuous PM 2.5 monitoring, when configured with the specified settings and accessories.

Each hour, a small carbon-14 element emits a constant source of high-energy electrons (known as beta rays) through a spot of clean filter tape. These beta rays are detected and counted by a sensitive scintillation detector to determine a zero reading. The APDA-371 automatically advances this spot of tape to the sample nozzle, where a vacuum pump then pulls a measured and controlled amount of dust-loaded air through the filter tape. Hourly this dirty spot is placed back between the beta source and the detector thereby causing an attenuation of the beta ray signal which is used to determine the mass of the particulate matter on the filter tape.

Data collection:
All data files are accessible via standard two-way RS-232 serial port using common terminal programs. The data is available in a variety of formats including daily reports, last record, all data, and new records since last download. Configuration files, error logs, and flow statistics are also available. Digital dataloggers may obtain data from the unit using serial port commands or by recording the automatic hourly serial output.

Error handling:
The APDA-371 performs continuous user selected Evaluation, including flow statistics and a comprehensive set of error codes (power failures, flow failures, hardware failures, tape errors, nozzle errors, span check errors, beta count errors, and more).

Maintenance:
The APDA-371 is designed to run continuously with monthly or bi-monthly scheduled maintenance only. A single roll of filter tape will last more than 60 days. The APDA-371 also contains a comprehensive self-test function which allows the unit to preemptively test itself for any mechanical failures in the tape control system.

Features

  • EN & U.S. EPA Federal Equivalent Method for PM 10 and PM 2.5 monitoring.
  • Long term unattended remote operation of up to 60 days between site visits.
  • Very low operating costs.
  • Fast and easy field audits using common FRM audit tools.
  • Bench top or equipment rack mounting in mobile or stationary shelters.
  • Rugged anodized aluminum, 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 datalogger allows the connection of up to six additional meteorological sensors.
  • Internal memory provides up to 182 days of digital data storage.
  • Data retrieval through RS-232 serial ports using direct PC connections, modems, printers, or digital data collection systems.

Specification

  • Principle: Beta Ray attenuation
  • Application: PM10
  • Range: 0-1,000mg/m3(standard), 0-1.000µg/m3
    0-200/0-250/0-500/2.000/5.000/10.000µg/m3(special application)
  • Repeatability: ±2.0% of F.S. at 1000/5000/10000μg/m3 range
  • Linearity: ±3.0% of F.S. at 1000/5000/10000μg/m3 range
  • Zero Drift: ±20μg/m3/day at 200/500/1000/5000/10000μg/m3
  • Span Drift: ±30μg/m3/day at 200/500μg/m3 range
    ±3.0% of F.S. at 1000/5000/10000μg/m3 range
  • Measurement time: 1 hour
  • Sample gas flow rate: Approx. 16.7L/min: Alarms: Tape failure, Flow rate failure, etc.
  • Input/output: 0-1 V, pulse signal, Contact Input/Output(Range, Power failure, alarm, etc.)
  • Option: RS-232C, LAN connecting terminal(TCP/IP)
  • Power: AC100 VAC± 10V, 50/60 Hz, approx. 200VA
  • Dimensions: 430(W) x 483.5(D) x 266(H) mm
  • Mass: approx. 19kg for SPM monitor
    approx. 5kg for sampling pump

HORIBA Europe GmbH
HORIBA Europe GmbH
Julius Kronenbergstrasse 9
Leichlingen 42799

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