Tewameter® TM Nano
Ultra-Small TEWL Measurement Probe for Special Skin Sites
With its exceptional small measuring chamber (only 2 mm Ø), the Tewameter® TM Nano allows to measure the Transepidermal Water Loss (TEWL) in g/h/m² on small, or difficult to reach sites, e.g. nails, scalp with hair, lips, etc.
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Advantages & Fields of Application
Apart from the many advantages of the Tewameter® in general, the Tewameter® TM Nano offers additional benefits:
- The ultra-small probe head (only 2 mm Ø) allows accurate and quick measurement of the TEWL in g/h/m² (pressure, occlusion, temperature). The small measurement chambers minimize the air turbulences inside the probe.
- The measurement of the Tewameter® is the basic measurement for all cosmetic applications regarding efficacy/safety testing and claim support. The Tewameter® TM Nano is ideally suitable to measure on small sites, e.g. nails, lips, scalp with hair, hairy or small animals, etc.
- Special rubber rings make the probe sit tightly even on slightly curved surfaces (e.g. the nails). As they are exchangeable, the rings can be cleansed hygienically.
- New sensor technology for precise and very stable measurements.
- The accurate calibration of the probe can easily be verified with the check calibration mode.
The Tewameter® TM Nano can be connected to the MPA-systems.
Other related probes available:- Tewameter® TM 300: the classical, most used probe for TEWL measurements
- Tewameter® Triple TM 330T: TEWL measurement probe with three flexible measurement heads to measure either on a large surface or on three different surfaces simultaneously
- Invitro Tewameter® VT 310: TEWL measurement directly on Franz cells
- Tewitro® TW 24: TEWL measurement on up to 24 cultured skin wells simultaneously.
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Measurement Principle
The open chamber measurement of the Tewameter® is the only method to assess the TEWL continuously, which is necessary for most applications without influencing the skin surface. Numerous studies are available. -
Technical Data
Probe only:
Dimensions: measuring chamber: approx. 2.3 cm high, Ø 2 mm, total contact surface: Ø 4 mm, length of the probe: approx. 15.3 cm, cable length: 1.3 m, weight: approx. 90 g, Resolution: relative humidity ± 0.01 % RH, Temp.: ± 0.01 °C, TEWL: 0.1 g/h/m², Measuring area: TEWL 0-320 g/h/m²Measurement uncertainty:
Operation conditions: T: 10-40° C, RH: 30-70 % RH
TEWL:
±10 % of the measured value plus ±1 g/h/m² for RH ≤ 80 %,
± 20 % of the measured value plus ± 2 g/h/m² for RH > 80 %
Temperature (T):
± 0.1° C for 20° C to 60° C,
± 0.2° C below 20° C and above 60° C
Rel. humidity (RH):
± 2.0 % for 0 to 80 % RH and 10° C to 50° C,
± 3.0 % above 80 % RH,
± 3.0 % below 10° C and above 50° C
Technical changes may be made without prior notice.
