PPB to high PPM range
Accurate, stable concentrations
Safe and convenient
Economical, flexible alternative to
bulky bottled mixtures
NIST traceable
Dynacal permeation devices are small, inert capsules
containing a pure chemical compound in a two phase
equilibrium between its gas phase and its liquid or solid
phase. At a constant temperature, the device emits the
compound through its permeable portion at a constant rate.
Permeation devices are typically inserted into a carrier flow
to generate test atmospheres for calibrating gas analyzer
systems, testing hazardous gas alarms, or conducting
long-term studies of effects on materials or biological
systems – in short, any situation requiring a stable
concentration of a specific trace chemical.
Description
Advantages Over Bottled Standards
Calibration devices from VICI
Metronics offer several
key advantages over
cylinder-supplied gas
calibration standards.
Economy is always a
major consideration;
customers who have
done the arithmetic, fac-
toring in the cost of cylinder
purchase, rental fees, shipment,
and disposal, typically discover that the purchase of a
Dynacalibrator and a supply of permeation devices will
start to save them money in the second year of use.
Multicomponent mixtures can be easily generated with a
Dynacalibrator and the appropriate combination of
permeation devices. This technique also allows the removal
of a single component from a gas mixture by simply
removing the appropriate permeation device. Alternative
methods require expensive custom mixtures or a large
number of gas cylinders, which consume valuable lab
space as well.
Bottled standards can also have problems arising from
degradation of the standard within the cylinder, from
changes in the concentration levels as the cylinder pressure
changes, and from interaction of calibration components
and surfaces.
&
Dynacal
®
Permeation Tubes
Analytical
Components
Systems
VICI Metronics Inc.
Accuracy
The purpose of a calibration gas standard is to establish
a reference point for the verification of an analysis.
Permeation tube rates can be certified using standards
traceable to NIST by the most basic and accurate laboratory
procedure – measuring the gravimetric weight loss over
a known period of time at a known temperature.
Permeation rate data is already established for hundreds
of different compounds, and rates for new compounds can
be easily certified using NIST-traceable standards. Their
small size and inherent stability allow us to inventory
thousands of devices for delivery from stock, and because
of the size and the limited quantity of chemical fill, we can
offer overnight delivery via air express.
Availability and Delivery
PERMEABLE TUBE
GAS PHASE
LIQUID PHASE
IMPERMEABLE PLUG
Website : www.chromtech.net.au E-mail : info@chromtech.net.au TelNo : 03 9762 2034 . . . in AUSTRALIA