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US-EPA Equivalent Method

Met One BAM-1020 is a US-EPA designated beta gauge Instrument used

world wide.

EPA Designation vide EQPM-0798-122

Automatically measures Zero and Reference Mass value in each

cycle.

Does not require the use of correction factors. Best accuracy of all beta models.

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BAM-1020 Advantages

Continuously samples and measures ambient air for particulate

matter.

45 day continuous operation between filter tape changes.

Accessories available for measuring PM2.5 and TSP.

Heated Probe system to avoid moisture condensation in areas

having high Humidity.

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Theory of Operation Beta rays are measured through clean filter

tape.

Air containing particulate is sampled and

deposited on the filter tape.

Beta rays are measured through dirty filter

tape.

The difference between the two

measurements is proportional to the mass

concentration.

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Beta Gauge Advantages

Time proven, stable technology: beta gauges have been in use

for over 60 years.

Beta attenuation technique is simple, easy to use, and requires

less maintenance than other methods.

Fewer site trips required, ideal for remote deployment.

Met One beta gauges are manufactured and supported from the

United States.

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Beta Gauge Advantages

Seasonal and geographical correction factors are not needed.

It is not necessary to calibrate the beta measurement system in

the field.

BAMs provide excellent agreement with gravimetric reference

standards when properly maintained and operated.

Beta technology is virtually unaffected by the chemical

composition of the sampled particulate.

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BAM-1020 Advantages

Continuously samples and measures ambient air for particulate

matter.

Designed to predict the mass concentration measured by manual

gravimetric samplers with the highest accuracy.

Does not require the use of correction factors

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BAM-1020 Advantages

60 day continuous operation between filter tape changes.

Designed for long term operation at a fixed installation.

Powerful integrated 6 channel data logger compatible with a

wide array of meteorological sensors. Best accuracy of all beta models.

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Simplicity Measurement System

The BAM-1020 measurement systemconsists of a few simple components:

Carbon 14 Beta source

Filter tape support

Photomultiplier tube detector

Preamp circuitry

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BAM Comparison to EPA Reference for

PM2.5