Disposable Permeation Tubes
KIN-TEK Trace Source™ Disposable Permeation Tubes [brochure] are:
Polymer membranes about the size of a pencil containing the liquid phase
of the component compound
Popular because they are small and convenient to use.
Standard Rate Disposable Permeation Tubes
SRT Standard Rate Disposable Permeation Tubes
SRT Standard Rate Disposable Permeation Tubes generate moderate
concentrations of high vapor pressure compounds. These compounds include
SO2, H2S, NH3, Cl2, etc. Additionally, SRT permeation tubes can generate
very low concentrations of low vapor pressure compounds such as Carbon
disulfide, Methylene chloride and Nitric acid. Typical emission rates
yield concentrations of 1 to 10 ppm depending on the compound, operating
temperature and dilution flow rate.
SRT-2 Standard Rate Disposable Permeation Tubes
SRT-2 Disposable Permeation Tubes can generate moderate concentrations
of high vapor pressure compounds such as Cl2, NO2 and NH3. These tubes
can be used at temperatures up to 50°C. Typical emission rates yield
concentrations of sub-ppm to 5 ppm depending on the compound, operating
temperature and dilution flow rate.
HRT High Rate Disposable Permeation Tubes
HRT High Rate Disposable Permeation Tubes
HRT Permeation Tubes can generate moderate concentrations of low vapor
pressure compounds. These compounds include C2H5SH, CCl4, Acrylonitrile,
Benzene, Styrene and Water. HRT tubes are also used for generating high
concentrations of SO2, CH3SH and other moderate vapor pressure compounds.
Typical emission rates yield concentrations of 1 to 20 ppm, depending on
the compound, operating temperature and dilution flow rate.
Extra Life Disposable Permeation Tubes
ELHRT Extra Life High Rate Disposable Permeation Tubes
EL-HRT Permeation Tubes are used for generating moderate concentrations of
low vapor pressure compounds such as C2H5SH, Benzene, and Water, and for
generating high concentration mixtures of SO2, CH3SH and other moderate vapor
pressure compounds. Typical emission rates yield concentrations of 1 to 10
ppm, depending on the compound, operating temperature and dilution flow rate.
ELSRT Extra Life Standard Rate Disposable Permeation Tubes
EL-SRT Permeation Tubes are used for generating moderate concentrations of
high vapor pressure compounds such as SO2, H2, NH3, and Cl2, and for
generating very low concentrations of low vapor pressure compounds such as
Benzene, Acrolein, and Water. Typical emission rates yield concentrations of
1 to 5 ppm, depending on the compound, operating temperature and dilution
flow rate.
ELSRT-2 Extra Life Standard Rate Disposable Permeation Tubes
ELSRT-2 Permeation Tubes are used for generating low to moderate
concentrations of high vapor pressure compounds such as Cl2, NO2, and NH3.
Typical emission rates yield concentrations of sub-ppm to 2.5 ppm, depending
on the compound, operating temperature and dilution flow rate. This type of
tube is also used for field service where higher operating temperatures may
be required.
Overview
The purpose of a gas standard is to
establish accurate reference points for
the verification of an analysis.
Static mixtures in gas cylinders are often unreliable and inaccurate at the
levels (ppm to ppb) that analytical technology now demands.
In gas cylinders containing low level mixtures, the trace components often
adsorb on to, or react with, the cylinder walls causing the standard to be
inaccurate and unreliable.
Also, it may be impossible to get a matrix gas that is completely free of the
trace component, thus making it impossible to get a true reference point with
a cylinder mixture.
These problems are solved by using permeation tubes in lieu of gas cylinders.
Types of KIN-TEK Trace Source™ Permeation Tubes
KIN-TEK manufacturers permeation tubes in two basic types – disposable and
refillable – for over 500 chemicals.
Disposable Tubes
Disposable Permeation Tubes are tubular devices about the size of a pencil
with liquid component compound sealed inside. The component compound slowly
permeates through the tubing wall creating a very small flow of component
vapor. Disposable tubes have a finite operating life and are discarded at the
end of that life. They are primarily used to make lower and medium
concentration mixtures.
Refillable Tubes
Refillable Permeation Tubes generally offer a broader range of concentration
than disposable tubes. They are often recommended for long-term service and
for applications requiring a broad range of calibration points.
Refillable tubes are used for higher concentration mixtures. They are also
used for high pressure gas components (CH4, C2H4, O2, H2, etc.) where the gas
must be frequently replenished. KIN-TEK offers factory refill and
recertification services; however, some tubes may be refilled by the customer
(with appropriate safety measures in place).
High emission tubes in gas service are refilled in-situ, using controls in
various models of KIN-TEK Gas Standards Generators.
To learn more, read the following PDF document titled “Permeation Tubes: A
simple Path to Very Complex Gas Mixtures.
Reasons To Use Permeation Tubes
Accuracy
KIN-TEK Trace Source™ Permeation Tubes
are reliable and accurate. Because the
calibration standard delivered by the
permeation tube method is used fresh
(i.e., dynamically), adsorption and
reaction problems are minimized.
Compliance
Our customers are increasingly concerned about compliance issues, OSHA, ISO
9000, GMP, and other industry requirements. Addressing these concerns, KINTEK supplies a certificate documenting traceability to NIST with every
certified Trace Source™ permeation tube. Each tube is numbered and its
emission rate is kept on file at KIN-TEK for up to 5 years
KIN-TEK also provides Technical Services for permeation tube recertification,
annual instrument recertification, and periodic on-site calibration to help
you maintain compliance with your internal standards.
Safety
Trace Source™ Permeation Tubes are very small compared to high pressure gas
cylinders (disposable tubes are about the size of a pencil). Permeation tubes
contain only a small amount of chemical thus limiting the possibility of
acute exposure.
Eliminate The Danger of High Pressure Cylinders
Trace Source™ Permeation Tubes eliminate the hazards of handling high
pressure cylinders. They contain analyte only under its own vapor pressure
and have no valves to break off. Permeation tubes do not require special
equipment to handle or transport them. Most permeation tubes can be shipped
worldwide as non-hazardous goods.
Savings
One Trace Source™ Permeation Tube can often replace 10 or more gas cylinders.
When used in a KIN-TEK Gas Standards Generator, one Trace Source™ Permeation
Tube can typically deliver concentrations over a range of 20:1 with primary
dilution and 10000:1 (or more) with secondary dilution.
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