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Corneometer® CM 825
Global reference device for quantitative skin hydration measurement
Overview
The Corneometer® is one of the most widely used scientific instruments for measuring skin hydration. Developed by Courage + Khazaka electronic GmbH, the Corneometer provides fast, objective, and reproducible measurements of the skin’s moisture level, making it an essential tool for cosmetic research, dermatology studies, clinical trials, and product efficacy testing.
The measurement is based on the skin’s capacitance principle, which detects changes in the dielectric properties of the stratum corneum. Since water has a much higher dielectric constant than most other skin components, the Corneometer can accurately evaluate the hydration level of the outer skin layer within seconds
Features
Objective skin hydration measurement
Provides quantitative assessment of the moisture content in the stratum corneum.
Capacitance-based technology
Provides quantitative assessment of the moisture content in the stratum corneum.
Fast measurement time
Delivers results within seconds, making it suitable for clinical studies, product testing, and routine skin evaluation.
High reproducibility
Designed for reliable and repeatable measurements when used under controlled testing conditions.
Non-invasive and painless
Measures skin hydration without damaging or irritating the skin surface.
Compact probe design
Easy to handle and suitable for measurements on different body areas.
Suitable for cosmetic and dermatological studies
Ideal for evaluating moisturizers, cleansers, barrier-repair products, active ingredients, and treatment effects.
Before-and-after comparison
Supports product efficacy testing by comparing baseline and follow-up hydration measurements.
Compatible with the MPA system
Can be connected to the Courage + Khazaka MPA platform and combined with other probes for multi-parameter skin analysis.
Scientific and industry-recognized method
Widely used in cosmetic science, dermatology research, clinical testing, and claim substantiation studies.
Trusted in cosmetic and dermatology research
The Corneometer is widely recognized as a standard instrument for stratum corneum hydration assessment.
Helps compare formulations objectively
Useful for screening and comparing creams, lotions, cleansers, active ingredients, and treatment protocols.
Part of a complete skin testing platform
As part of the Courage + Khazaka MPA system, the Corneometer can be combined with other probes such as the Tewameter®, Sebumeter®, Cutometer®, and Mexameter® to provide a more complete and quantitative analysis of skin condition.
Strengthens scientific reporting
Generates quantitative results that can be used in study reports, product development documentation, marketing claims, and technical dossiers.
Key Benefits
Supports reliable hydration claims
Provides objective data to help substantiate moisturizing, hydrating, and barrier-support claims for cosmetic and dermatological products.
Fast and easy to integrate into studies
Short measurement time makes it suitable for clinical trials, consumer studies, laboratory testing, and routine evaluations.
Improves product efficacy evaluation
Enables clear before-and-after comparison to assess how formulations affect skin hydration over time.
Non-invasive measurement method
Allows repeated measurements on the same skin area without damaging or irritating the skin.
Technology
The Corneometer® measures skin hydration using the capacitance principle, a well-established method for evaluating the moisture level of the stratum corneum, the outermost layer of the skin.
Water has a much higher dielectric constant than most other substances found in the skin. When the Corneometer probe is placed gently on the skin surface, it detects changes in the skin’s electrical capacitance. These changes are directly related to the water content in the stratum corneum.
The measurement is performed quickly and non-invasively, without affecting the skin surface. The probe only evaluates the superficial hydration level, making it highly suitable for moisturizing efficacy studies, cosmetic product testing, dermatological research, and claim substantiation.
Application
Moisturizing efficacy studies
Evaluate the hydration performance of creams, lotions, serums, masks, and other moisturizing formulations.
Cosmetic claim substantiation
Generate objective data to support claims such as “improves skin hydration,” “provides long-lasting moisture,” or “helps maintain skin moisture balance.”
Before-and-after product evaluation
Compare baseline and follow-up measurements to assess hydration improvement after product application or treatment.
Dermatology and clinical research
Measure changes in stratum corneum hydration in studies involving dry skin, sensitive skin, barrier function, and treatment follow-up.
Formulation screening and comparison
Compare different active ingredients, product prototypes, or finished formulations during product development.
Consumer and volunteer studies
Collect fast, non-invasive hydration measurements in controlled study environments.
Routine skin assessment
Support quantitative skin evaluation in cosmetic laboratories, research centers, dermatology clinics, and product testing facilities.
Available Configuration
The Corneometer® CM 825 is available in multiple configurations: as a stand-alone MDD 4 device, integrated into the Derma Unit SSC 3, connected to MPA systems, or as a wireless probe.
MPA
MDD 4
Wireless
FAQs
What does the Corneometer® measure?
The Corneometer® measures the hydration level of the stratum corneum, the outermost layer of the skin. It provides objective and quantitative data on skin surface moisture.
How does the Corneometer® work?
The Corneometer® uses the capacitance principle. Since water has a high dielectric constant, changes in skin capacitance are related to the amount of water present in the stratum corneum.
Is the Corneometer® measurement non-invasive?
Yes. The Corneometer® measurement is non-invasive, painless, and fast. The probe is gently placed on the skin surface, and the measurement is completed within seconds.
What types of products can be tested with the Corneometer®?
The Corneometer® is commonly used to evaluate moisturizers, creams, lotions, serums, cleansers, masks, active ingredients, and dermatological formulations.
Can the Corneometer® be used for claim substantiation?
Yes. The Corneometer® is widely used in cosmetic and dermatology studies to generate quantitative data supporting hydration-related claims such as moisturizing effect, long-lasting hydration, and improvement of skin moisture level.
Does the Corneometer® probe require calibration?
Yes. To maintain measurement accuracy and reliability, the Corneometer® probe should be calibrated every 2 years. Each probe comes with a calibration certificate, providing documented confirmation of its calibration status. Regular calibration helps ensure consistent performance, support quality control, and provide confidence in study results and claim substantiation data.
Is there a calibration check method for the Corneometer® probe?
Yes. The Corneometer® has a calibration check method using dedicated calibration check accessories and the software procedure. This allows users to verify whether the probe is working within the expected range between factory calibrations. If the calibration check result is outside the acceptable range, the probe should be sent for professional inspection or recalibration.
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