Courage + Khazaka electronic GmbH

Scientific News

Invitro Tewameter® VT 310

Probe perfectly suited for TEWL-measurements on Franz cells

VT direkt membran close upWith the Invitro Tewameter® VT 310 a probe for the TEWL measurement is available, which offers all benefits of the Tewameter® and is perfectly suited to sit on a Franz cell.


It emulates completely the upper part (donor chamber) of a Franz cell (standard is 15 mm Ø, other sizes on request).Thus the probes sits exactly on the membrane of the Franz cell as it would sit on skin directly without needing further adapters.
The measured TEWL-value is expressed in g/h/m², the worldwide acknowledged absolute measuring value for skin.
No other probe offers this possibility invitro.

If needed, the probe can also be used on a centerpiece of high quality Teflon, which fits exactly on the probe and the receptor chamber of the Franz cell without further fixing adapters. The thus measured TEWL has to be regarded relatively (no longer absolute figures as the distance between probe and membrane is changed).

VT probe VT mittelstück Invitro Tewameter mounted on centerpiece

In vitro TEWL measurements have a variety of different applications:

  • inexpensive pre-screening before in vivo tests (no ethic commission, no expensive volunteers)
  • only way to study skin permeability and dermal absorption necessary for safety and efficacy testing
  • in vitro tests are established in several worldwide acknowledged guidelines: WHO (World Health Organization), SCCS (Scientific Committee on Consumer Safety) and OECD (Organization for Economic Cooperation and Development.

Read more....

With the usage of our services you permit us to use cookies.