Tewameter^® TM Nano

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 (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 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.

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.

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 area: TEWL 0-320 g/h/m²

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,
± 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.