Delfin VapoMeter SWL5 User Manual page 12

Adapters
The VapoMeter has been calibrated with the standard and the small adapters. The
measured values are reliable only when using one of these adapters with the
corresponding adapter mode.
Person-related and environmental variables
This list contains only selected variables.
Sweating
The pre-measurement rest is important particularly when examining the skin water
barrier function (TEWL). If the skin surface is damp, the water loss rate includes free
water evaporation from the skin surface. This may be emphasised in hairy skin sites.
The measured site has to be uncovered during the rest, at least 5 to 15 minutes before
the measurement, depending on the degree of occlusion that inhibits the normal
evaporation.
Air flows
The measurement chamber is closed during the measurement and thus, not sensitive to
normal ambient air flows. However, it is not recommended to breath directly on the
adapter, e.g. during the measurement of lip.
Ambient relative humidity and temperature
We recommend measurements in relative humidity between 10 % and 60 % and in
temperatures between 20 C and 25 C.
References:
1. Skin Research and Technology, 2013;0;1-10. du Plessis et al. International
Guidelines for the in vivo assessment of skin properties in non-clinical settings:
Part 2. transepidermal water loss and skin hydration.
2. Contact Dermatitis,
transepidermal water loss (TEWL) measurement.
1990:22:164-178.
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VapoMeter SWL5 User Manual 1.3
Pinnagoda et.al.
10.11.2016
Guidelines for