CK TM330T Triple-Probe Transepidermal Water Loss (TEWL) Measurement System
| Brand | CK |
|---|---|
| Origin | Germany |
| Manufacturer Status | Authorized Distributor |
| Origin Category | Imported |
| Model | TM330T |
| Pricing | Upon Request |
Overview
The CK TM330T Triple-Probe Transepidermal Water Loss (TEWL) Measurement System is an engineered solution for high-throughput, comparative assessment of epidermal barrier integrity in dermatological research, cosmetic efficacy testing, and clinical trial applications. TEWL quantifies the rate of water vapor diffusion across the stratum corneum under non-occlusive, steady-state conditions—governed by Fick’s law of diffusion and dependent on skin surface microclimate, ambient humidity gradient, and local temperature. Unlike single-probe instruments, the TM330T integrates three independent, parallel measurement channels within a single chassis, each equipped with a thermally stabilized open-chamber sensor based on the gravimetric principle (dual-sensor gradient method). This architecture eliminates inter-unit calibration drift and ensures synchronous environmental exposure—critical for minimizing temporal variability when evaluating spatial heterogeneity (e.g., cheek vs. forehead vs. forearm) or longitudinal response to topical interventions.
Key Features
- Triple-sensor configuration enables simultaneous, real-time TEWL acquisition from three anatomically distinct sites without operator repositioning or sequential delay
- Individual probe thermal regulation maintains ±0.1 °C stability at skin interface, compensating for ambient fluctuations per ISO 24444:2019 requirements
- Integrated environmental monitoring module continuously records ambient temperature and relative humidity (RH) adjacent to each probe aperture
- Modular probe design supports interchangeable sensor heads optimized for curved surfaces (e.g., facial contours) and flat domains (e.g., volar forearm)
- Robust aluminum alloy housing with ESD-safe finish; IP54-rated for controlled laboratory environments
- Compliant with ISO 24444:2019 (Cosmetics — Methodology for the assessment of transepidermal water loss) and aligned with ASTM E1965–22 (Standard Guide for In Vivo Assessment of Skin Barrier Function)
Sample Compatibility & Compliance
The TM330T accommodates human subjects across age groups (adults, adolescents, and pediatric cohorts under ethical oversight), including sensitive or compromised skin (e.g., atopic dermatitis, post-procedure sites). Probe apertures (8 mm diameter) conform to ISO-recommended dimensions for standardized flux calculation. All measurement protocols adhere to Good Clinical Practice (GCP) and GLP principles, supporting audit-ready documentation for regulatory submissions (e.g., FDA IND/IDE, EMA CTA). Data traceability complies with 21 CFR Part 11 requirements when used with CK’s validated software suite, including electronic signatures, audit trails, and user-access controls.
Software & Data Management
Acquisition and analysis are managed via CK’s proprietary DermaLab Suite v5.2, a Windows-based platform certified for IEC 62304 Class B medical device software. The system logs timestamped TEWL values (g/m²/h), ambient T/RH, and probe-specific metadata at configurable intervals (1–60 s). Export formats include CSV, XML, and PDF reports compliant with CDISC SDTM standards. Batch processing tools enable statistical comparison across probes, timepoints, and subject groups—including ANOVA, paired t-tests, and intra-class correlation coefficient (ICC) calculation for inter-probe reproducibility assessment. Raw data files are digitally signed and cryptographically hashed to ensure integrity during archival or third-party review.
Applications
- Evaluation of barrier repair kinetics following surfactant challenge or tape-stripping protocols
- Comparative assessment of moisturizer efficacy across formulation variants (e.g., ceramide-containing vs. hyaluronic acid-based emulsions)
- Site-specific TEWL mapping in photodamage studies (e.g., UV-exposed vs. shielded zones)
- Longitudinal monitoring in chronic inflammatory dermatoses (e.g., psoriasis, contact dermatitis) during therapeutic intervention
- Preclinical validation of transdermal delivery systems using ex vivo human skin models
- Regulatory dossier generation for cosmetic ingredient safety dossiers (e.g., SCCS opinions, ASEAN Cosmetic Directive Annex III compliance)
FAQ
How does the triple-probe design improve measurement reliability compared to sequential single-probe testing?
It eliminates temporal confounders—such as diurnal variation in cutaneous blood flow, ambient RH drift, or subject movement—by capturing all three data streams under identical microclimatic conditions and within a single acquisition window.
Can the TM330T be used for occluded or semi-occluded measurements?
No—the system is designed exclusively for non-occlusive, open-chamber TEWL assessment per ISO 24444:2019. Occlusion alters vapor gradient dynamics and invalidates standard TEWL interpretation.
Is calibration traceable to national metrology institutes?
Yes—each sensor undergoes factory calibration against NIST-traceable humidity and temperature references, with certificate of calibration provided per unit and valid for 12 months.
Does the system support integration with LIMS or ELN platforms?
Via HL7 v2.5 and ASTM E2500-compliant API, enabling bidirectional data exchange with enterprise laboratory informatics systems.
What maintenance is required to sustain measurement accuracy?
Quarterly verification using CK’s certified reference humidity generator (Model HG-200) and annual recalibration at CK’s EU service center or authorized facility.
