|
Frequently Asked Questions |
- Assay Technology recommends using a 546 monitor for my
chemical, but the 566 and the 521 will give me lower reporting
limits. Won't lower reporting limits give me a more
precise number?
Devices that sample faster will give you lower reporting
limits, but they will also lower the sampler's capacity to
collect chemicals. For example, if you sample for
Methanol all day at a high concentration, the charcoal
inside of any fast sampling badge will be spent long before
the sampling is over, giving you a biased low result.
In those cases, a slower sampling badge, like the 546 will
definitely be a better choice.
|
- What happened to the 541, 561, and 526 badges?
- The 541 monitor was replaced by the 566 monitor, which
utilizes the popular ChemDisk II configuration
and a new, flexible, inert, charcoal wafer.
- With the addition of the
fast sampling rate badge, 521, the 561, which formerly was
our
fastest sampling rate badge, was not necessary anymore.
- The 526 was the high
capacity TraceAirฎ badge. Since the existing 546 badge already had more
capacity, the 526 badge was rendered obsolete.
|
- Can I collect more than one chemical on a single badge?
Definitely.
However, not every chemical that can be sampled on these badges can be sampled
with every other chemical. For example, Total Hydrocarbons can not be sampled
at the same time as Methanol. Go to our
Sampling Guide and find the chemicals you
are interested in. Find the Test Group column. All chemicals with the same
Test Group can be collected together.
|
- I want to monitor for more than one chemical at a time.
Assay Technology recommends a 521 for one chemical and a 546 for
another. Do I have to use 2 different badges?
CASE 1:
It is important to keep in mind that each badge collects each
chemical. If you are expecting high levels of the 546
recommended chemical and want to monitor all day, then you are
likely to run into capacity problems with the 521 badge. So you
are better off using just the 546 monitor or the more
versatile 566 for that environment.
CASE 2:
If you
are expecting low levels of these chemicals, then the 521
badge can be used for both, unless the chemical is
specifically not recommended for collection on a 521.
See the 521 sampling rates.
Chemicals that are not recommended are noticed.
CASE 3:
If you are STEL monitoring, the 521 can be used for both.
|
- You recommend a 521 for my chemical. Can I use a 546 or
566 instead?
Certainly. It is important to keep in mind, since the 566 and 546 sample slower than the
521, the reporting
limits will be higher when using these badges. However, except in extreme
cases, this is not significant. To find out what the reporting
limits will be, contact us or go to the
Reporting Limit section
of our web site.
|
- The reporting limits listed on the web site are for an 8
hour monitoring. I am going to monitor for less than that. What
will the reporting limit be?
Go to the Reporting Limit section of our
web site. The reporting limit listed will be the 8 hour
limit. To estimate the reporting limit you will get for your time
monitored, use this simple equation:
Eight Hour
Reporting limit, ppm X 8 hours
=
Reporting Limit for
the time you monitored.
Actual
monitoring time, hours
For example, The 8 hour reporting limit for Acetone on the 566
is 0.2 ppm. If you monitor for only 2 hours, then the reporting limit
will be approximately 0.8 ppm. It is important to keep in mind
the reporting limits listed on the website have been rounded off
already. If the unrounded reporting limit was 0.163 ppm, 4 times
that is 0.64 ppm. So we will actually report a reporting limit
of 0.6 ppm. If you want the precise number, call our customer
service department. 800-833-1258 ext. 4.
|
- Which badge do I use for my chemical?
- Use our
Chemicals
Sampled on Badges Guide to find your chemical by name
and the badge we recommend for an 8 hour monitoring.
- For STEL monitoring use a 521 or 566.
- Call us for a recommendation. 800-833-1258 ext 4.
|
|
|
