APM - Air Particulate Monitor Series

The APM Air Particulate Monitor series are real time measuring devices for the continuous monitoring of the smallest concentration of particles in the ambient air. These units can accurately measure ambient particles in the atmosphere and are highly demanded in today's monitoring industry. APM systems are easy to operate, accurate, reliable, and repeatable measurements of ambient fine particulate matter. Since sampling is performed under true ambient conditions, semi-volatile organic compounds and nitrates are easily detected, avoiding errors. Size selective concentration measurements can be made using PM10, PM2.5 or PM1 sampling inlets.
The APM series implement advanced Beta ray attenuation principles to measure and record airborne particulate concentration levels. It can directly measure the mass of particulates in air without the effects of compounds, density, color, etc. A low energy Carbon-14 source furnishes a constant supply of beta electrons which are subsequently detected. A filter tape is interposed between the source and the detector which produces an initial reduction in the number of beta electrons reaching the detector. The particulate measurement cycle begins by measuring a clean area (spot) on the tape for a fixed time period to determine a zero value. This clean spot is then moved under a collection apparatus for sample extraction from the stack. A sample of stack gas is drawn through and deposits particles on the filter tape. All particles larger than 0.1 microns are collected. Once a sufficient amount of sample is collected, the tape is moved back under the beta source and re-measured. The ratio of beta transmissions measured from the original clear spot to the collected sample is proportional to the mass on the tape.

APM25 is a cost effective particulate monitor,

tuned to measure PM2.5 with high reliability

and accuracy.

APM - Air Particulate Monitor Series Features

• Highly accurate, reliable, and mechanically simple flow system

• Sampling and measurement are done in the same spot Simple and reliable mechanical paper drive

• Self test diagnostics

• Internal memory provides historical data storage Integrated data logger allows the connection of additional sensors

• Data retrieval through RS-232 serial ports

• State of the art outdoor enclosure without need of cooling or heating

APM systems are designed as simple, compact, and self-contained beta gauges, for applications where rapid deployment and short and long interval real-time measurements are required.

M-APM unit makes size selective concentration real time

measurements using PM10, PM2.5 or PM1 sampling inlets.

This enables units to monitor each of these three particle

sizes at a time.

APM1025 is designed as a simple, compact, and

self-contained beta for applications where simultaneous PM10 and PM2.5 real-time measurements are required.