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Overview |
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The Humidity
Filtering II Tube dries the sample
gas entering pumped instruments. It
is particularly suited for removing
humidity effects on photoionization
detectors (PIDs) while making VOC
measurements, and typically lasts
for about a half hour of continuous
readings. The
Humidity Filtering II Tube utilizes
a solid adsorbent to remove moisture
without impacting the detection and
measurement of most VOCs. |
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Key
Feature |
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Enables continuous
reading of VOCs under
extremely humid
conditions for about one
half hour (per tube) at
room temperature.
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Prevents drifting
readings at high
humidity when the sensor
is dirty. Extends the
time needed between
sensor cleanings.
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Attaches to the
Flex-I-Probe inlet with
the same adapter used
for ppbRAE VOC zeroing
tubes.
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Especially useful for
measuring chlorinated
solvents and fuels under
high humidity conditions
as are often encountered
during soil and water
remediation.
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Can be used with other
instruments having a
built-in pump such as
ppbRAE, UltraRAE,
MultiRAE, and VRAE when
humidity is an issue,
such as PID or low-level
LEL sensor measurements.
(See TN-178 [below] for
adapter connections or
for further details.)
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* Caution:
Absorbs
some compounds like ammonia
and slows the response of
heavy compounds, especially
at low concentrations or low
temperatures. |
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