Study and principles of corneometer

1. PRINCIPLES OF CORNEOMETer

2. Corneometer
The World's Most Popular Skin Hydration Measurement
Instrument.
For more than 30 years the Corneometer® has provided
the worldwide most used method to reproducibly and
accurately determine thehydration level of the skin surface
(stratum corneum). This is documented by the numerous
scientific literature in which the terms "corneometry" and skin
hydration measurements are inseparable.

3. MEASUREMENT PRINCIPLE
The measurement is based
on capacitance measurement of a
dielectric medium, here the stratum
corneum, the uppermost layer of the skin.
With increasing hydration, its di-electric
properties change. The measurement is
based on the fact that water has a higher
dielectric constant (81) than most other
substances (mainly < 7).

4. Advantages of the Corneometer
• The probe allows very quick measurement (1 s) important to avoid occlusion.
• Continuous measurements over a longer period can optionally be performed.
• Substances on the skin (e.g. salts or residues of topical applied products) have
only minimal influence due to capacitance measurement.
• The measurement depth is very small(10-20 μm of the stratum corneum) to
exclude the influence of deeper skin layers (e.g. from the blood vessels).
• The probe is small and lightweight for easy handling and measurement on all
body sites (e.g. lips etc.).
• The spring in the probe head ensures constant pressure on the skin enabling
exact, reproducible measurements.
• The accuracy of the Corneometer® probe and the penetration depth of the
scatter field can be checked easily anytime.
• The probe head can quickly be cleanedafter each measurement.

6. Fields of Application
• The hydration measurement is the basic
measurement for all bio-medical and cosmetic
applications.
• Ideal instrument for formulation, claim support and
efficacy & safety testing of all cosmetics & skin
care products(personal care, irritation research,
soaps and cleansers, occlusive product development),
raw materials, pharmaceuticals, household products,
detergents, food and food supplements and many
more
• Typical claims (examples) substantiated with the
Corneometer®: hydrating/moisturizing, against dry skin,
for sensitive skin, protecting, restoring/repairing,
supports healing, soothing, normalizing, vitalising, and
many more.
• Used as standard in dermatological basis
research in humans and animals.
• Occupational health assesses this parameter to
underline the importance of skin protection measures.

7. TECHNICAL DATA
• Probe only:
• Dimensions: 11 cm, Cable length: approx. 1.3 m, Measuring
surface: 49 mm², Weight: 41 g
• Measurement principle: capacitance, Units:arbitrary
Corneometer® units, Measurement frequency: 0.9-1.2
MHz, Pressure: approx. 1.0 N ± 10 %, measurement
uncertainty: ± 3%
• For the technical data of the wireless probe, please see Basic
Probe Systems.
• Technical changes may be made without prior notice.

8. BY – HIMANSHI MODI
8-SEM
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