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.
Advantages & Fields of Application
The Tewameter® TM Nano offers all advantages of the "open chamber measurement" and has additional benefits:
- The ultra-small probe head (only 2 mm Ø) allows accurate and quick measurement of the TEWL in g/h/m² (no pressure, occlusion, temperature accumulation on the measured skin site). 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 Hex: the ultimative TEWL measurement with one head
- 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.
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. 75 g (including cable), Resolution: relative humidity ± 0.01 % RH, Temp.: ± 0.01 °C, TEWL: 0.1 g/h/m², Measuring range: TEWL 0-320 g/h/m²
Operation conditions: T: 10-40° C, RH: 30-70 % RH
Measurement uncertainty:
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 and ±0.2 °C outside this range
Rel. humidity (RH): ± 2.0 % for 0 to 80 % RH and 10 °C to 50 °C, ± 3.0 % outside these ranges
Technical changes may be made without prior notice.
