Labthink CHY-C2A Mechanical Contact Thickness Gauge for Thin Films, Foils, and Battery Separators

Overview

The Labthink CHY-C2A Mechanical Contact Thickness Gauge is a precision metrology instrument engineered for high-reproducibility thickness measurement of planar, flexible, and compressible sheet materials. It operates on the principle of controlled-load mechanical compression: a calibrated measuring head applies a standardized pressure over a defined contact area to compress the specimen uniformly before detecting displacement via a high-resolution linear encoder. This method ensures compliance with internationally recognized standards—including ISO 4593 (plastic film), ISO 534 (paper and board), ASTM D374 (electrical insulating materials), and GB/T 6672 (polymer films)—where thickness is defined as the perpendicular distance between two parallel surfaces under specified loading conditions. Unlike optical or ultrasonic methods, the CHY-C2A delivers direct, traceable dimensional data without assumptions about material density, refractive index, or acoustic impedance—making it indispensable for quality control in regulated manufacturing environments such as lithium-ion battery separator production, pharmaceutical foil packaging, and precision metallized film lamination.

Key Features

• Standardized mechanical loading architecture compliant with ISO, ASTM, and GB test protocols—ensures inter-laboratory comparability and audit readiness.
• Dual-pressure and dual-contact-area configuration: 17.5 ± 1 kPa over 50 mm² for thin films, foils, and microporous separators; 50 ± 1 kPa over 200 mm² for paper, cardboard, and nonwovens—user-selectable via hardware switch or software command.
• Motor-driven automatic head lift/lower mechanism eliminates operator-induced preload variability and reduces measurement drift during repetitive testing.
• Real-time statistical computation: displays mean, min, max, standard deviation, and coefficient of variation for each test sequence—enabling immediate SPC assessment per ISO 22514 or IATF 16949 requirements.
• Microprocessor-controlled operation with backlit LCD and tactile PVC keypad—designed for glove-compatible use in cleanrooms and QC labs.
• Integrated RS232 interface supports bidirectional communication with external PCs for automated report generation, raw data export (CSV/TXT), and integration into MES or LIMS platforms.
• Factory-calibrated using NIST-traceable gauge blocks; includes one certified standard block (5.000 ± 0.002 mm) for routine system verification per ISO/IEC 17025 calibration management guidelines.

Sample Compatibility & Compliance

The CHY-C2A accommodates specimens up to 300 mm × 300 mm in footprint and up to 12 mm in nominal thickness (with optional extended range). It is validated for use with polymeric films (PET, PP, PE, PI), metallic foils (Al, Cu, Ni), ceramic-coated battery separators (PP/PE multilayers, Al₂O₃-coated membranes), filter papers, release liners, silicon wafers (bare or coated), and laminated packaging substrates. All operational parameters—including applied pressure, dwell time, and contact geometry—are aligned with the definitions stipulated in ISO 4593 (plastics), ISO 534 (paper), and USP (package integrity for sterile products). The instrument meets electromagnetic compatibility (EMC) requirements per IEC 61326-1 and safety standards per IEC 61010-1, supporting GLP/GMP-aligned documentation workflows when paired with Lystem™ software.

Software & Data Management

The CHY-C2A natively supports Labthink’s Lystem™ Laboratory Data Sharing System—a secure, role-based platform compliant with FDA 21 CFR Part 11 for electronic records and signatures. Lystem™ provides full audit trail functionality, user access controls, data encryption at rest and in transit, and automated report templates conforming to ISO/IEC 17025 clause 7.8. Optional PC software enables advanced analysis including trend charting, histogram distribution modeling, tolerance band overlay, and export to Excel, PDF, or XML formats. All measurement sessions are timestamped, user-logged, and linked to instrument firmware version and calibration status—ensuring full traceability from raw reading to final certificate.

Applications

• Lithium-ion battery manufacturing: thickness uniformity verification of anode/cathode foils and microporous polyolefin separators—critical for preventing dendrite penetration and ensuring cell cycle life.
• Pharmaceutical packaging: validation of aluminum foil and cold-forming blister laminate thickness per EP 2.6.1 and USP .
• Flexible electronics: dimensional control of PET substrates, ITO-coated films, and ultra-thin copper foils used in FPCB fabrication.
• Food & beverage packaging: QA of barrier films (EVOH, SiOx, AlOx), metallized CPP, and peelable lidstock—directly impacting seal integrity and shelf-life performance.
• Automotive composites: thickness profiling of prepreg tapes, carbon fiber veils, and thermoplastic laminates prior to autoclave curing.

FAQ

What standards does the CHY-C2A comply with for battery separator testing?
It fully satisfies ISO 4593, ASTM D374, and GB/T 6672—key references cited in UN 38.3 and IEC 62619 for separator dimensional qualification.
Can the instrument measure non-flat or corrugated samples?
No—it requires planar, stable surfaces. Curved, textured, or highly elastic specimens must be pre-conditioned or measured using alternative methods (e.g., laser triangulation or X-ray microtomography).
Is the 0.1 µm resolution guaranteed across the full 0–12 mm range?
Resolution remains constant at 0.1 µm; however, accuracy specifications (±0.8 µm typical) apply only within the calibrated range selected (e.g., 0–2 mm or 0–6 mm). Extended ranges require separate validation.
Does the system support 21 CFR Part 11 compliance out-of-the-box?
Yes—when configured with Lystem™ software, electronic signatures, audit trails, and data integrity controls meet all Part 11 requirements for regulated industries.
How often should the standard gauge block be recalibrated?
Annually, or per internal SOP aligned with ISO/IEC 17025 Clause 6.6; Labthink recommends third-party calibration against NIST SRM 2192 or equivalent.