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Part No. AF005-01
Standard Measurement Cap
The standard measurement caps have an orifice diameter
of 7mm and are used for routine TEWL & SSWL measurement. Their truncated
cone design leaves a contact mark on the skin to help with re-positioning
the probe in repeat measurements. Two standard caps are included with
each instrument.
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Part No. AF005-02
Calibration Cap
These caps seal the measurement chamber. You use these
for initial stabilisation, for zero-flux baseline setting and for
flux density calibration by the droplet method. Two calibration caps
are included with each instrument.
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Part No. AF005-03
Reduced Orifice Cap
Reduced orifice caps were designed for high flux measurements,
as encountered in perspiration research, for example. This cap has a
3mm diameter orifice, with which flux densities as high as 250
g/(sq.m h) can be measured with the AF200. Note also the domed shape
of the contact surface, which eliminates the contact mark left on the
skin by the standard truncated
cone cap design.
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Part No. AF005-04
Slotted Cap
Slotted caps were developed for scalp research, where the slot can be
aligned with the hair parting to enable TEWL measurements to be performed
without the need for shaving.
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Part No. AF005-05
Tube Cap
Tube caps were developed to facilitate measurements in places that are
difficult to reach with conventional caps, such as the nasolabial area,
for example.
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Part No. AF005-06
Funnel Cap
Funnel caps were developed to measure
average TEWL over an extended area. This one has a contact area of 17mm diameter. |
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Part No. AF005-07
Nail Cap
Nail caps are fitted with a rubber O-ring that deforms
to seal against hard, uneven surfaces such as a fingernail.
Click here for
a pdf showing an example of its use.
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| Franz Cell Donor Chamber Couplings |
These accessories couple different designs of Franz
cell donor chambers to the AquaFlux measurement head. A leak-tight seal
is essential for accurate membrane integrity assessment, as shown in
our recent publication at the Atlanta ISBS meeting. Click here for
a pdf of the presentation. Below are shown two examples - ask if you
need a coupling to a different cell.
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Part No. AF007-01
Coupling adaptor for Permegear 9mm Donor Chamber
This adaptor seals to the inner cylindrical surface
of the donor chamber by means of a rubber O-ring.
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Part No. AF007-02
Coupling adaptor for LGA Type LG-1084-SPC Donor Chamber
This adaptor seals to the outer cylindrical surface
of the donor chamber by means of a rubber O-ring.
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| Transpiration Accessories |
These accessory convert the AquaFlux into an instrument
for measuring water vapour transpiration through membranes. The method
is similar to the ASTM-96 standard method, but uses flux sensing rather
than weight loss measurement. This speeds up the measurements and provides
detailed information about dynamic changes during the approach to steady-state
transpiration.
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Part No. AF008-01
Nail Transpiration Accessory
The accessory consists of a stainless steel clamp to
seal nail clippings onto the AquaFlux measurement head. The orifice diameter
is 3mm and the clamp can accommodate nail clippings as small as 5mm diameter.
The funnel is used to add water to the top side of the nail. Use it to
measure transpiration and diffusion delay.
Click here for
a pdf showing some examples of its use.
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Part No. AF008-02
Transpiration Accessory
The accessory consists
of a clamp to seal the membrane into the water vapour path, with an
AquaFlux measurement head above and a standard 250mL wide-mouth glass
jar below. The membrane clamp can accommodate sample diameters in the
range 10 - 51mm and sample thicknesses up to 5mm. The jar can be filled
with water or a saturated salt solution to control the source humidity.
A thermostatted water bath (not supplied) can be used to provide further
control of source conditions.
Click here for
a pdf showing some examples of its use.
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