Labthink CHY-C2A Mechanical Contact Thickness Gauge for Thin Films and Sheets

Overview

The Labthink CHY-C2A Mechanical Contact Thickness Gauge is a precision metrology instrument engineered for high-reproducibility thickness measurement of flexible planar materials under controlled mechanical loading conditions. It operates on the principle of displacement transduction via a calibrated spring-loaded anvil and precision linear encoder, ensuring traceable, repeatable measurements compliant with international standard test methods for thin films and sheets. Unlike optical or ultrasonic alternatives, this gauge employs direct mechanical contact—eliminating refractive index dependency and enabling accurate assessment of opaque, multilayered, or highly textured substrates such as polymeric films, aluminum foils, battery separators, filter papers, and metallized laminates. Its design strictly adheres to standardized contact area and applied pressure specifications defined in ISO 4593 (plastics), ISO 534 (paper and board), and ASTM D374 (electrical insulating materials), making it suitable for quality control laboratories operating under GLP, GMP, or ISO/IEC 17025-accredited frameworks.

Key Features

• Microprocessor-controlled actuation with programmable measurement speed (up to 10 tests per minute) and automatic probe lift-off to prevent sample deformation and operator-induced error.
• Dual-pressure configuration: 17.5 ± 1 kPa for polymer films and thin flexible substrates; 50 ± 1 kPa for rigid or fibrous materials such as paperboard and nonwovens—user-selectable via menu interface.
• High-resolution linear encoder with 0.1 µm resolution and full-scale repeatability better than ±0.5 µm (verified using NIST-traceable gauge blocks).
• Integrated statistical engine computing real-time max/min/mean/stdev across up to 10 consecutive readings—displayed simultaneously on the 4.3-inch TFT LCD with intuitive PVC membrane keypad navigation.
• Standard RS232 serial interface supporting bidirectional communication with external PCs; compatible with Labthink’s Lystem™ Laboratory Data Management System for centralized audit trail, user access control, and electronic signature compliance per FDA 21 CFR Part 11.
• Modular mechanical architecture allowing optional upgrades including extended-range load cells (0–6 mm and 0–12 mm), calibrated reference weights, thermal-stabilized environmental enclosures, and dedicated print modules for GLP-compliant hardcopy reporting.

Sample Compatibility & Compliance

The CHY-C2A accommodates specimens up to 300 mm × 300 mm in footprint and supports standardized test geometries for film (50 mm² contact area), paper (200 mm²), and custom configurations per customer-specified ASTM or ISO annexes. It meets all dimensional and force calibration requirements outlined in ISO/IEC 17025 Clause 6.5 for measurement uncertainty estimation. The system includes a certified calibration kit comprising stainless-steel gauge blocks traceable to national metrology institutes (e.g., NIM, NIST, PTB), enabling in-house verification without third-party intervention. All firmware and embedded algorithms are validated against reference standards from ISO/IEC 17025-accredited calibration laboratories, ensuring data integrity during regulatory audits.

Software & Data Management

Lystem™ software provides secure, role-based access to raw measurement logs, statistical summaries, trend charts, and customizable report templates compliant with ISO 10012 and ASTM E2500. Each test record includes timestamp, operator ID, environmental conditions (if linked to optional hygrothermal sensors), calibration status, and full audit trail with immutable timestamps. Electronic signatures conform to FDA 21 CFR Part 11 Subpart B requirements, including identity authentication, action logging, and retention of original binary data files. Export formats include CSV, PDF/A-2, and XML for integration into enterprise LIMS or ERP platforms.

Applications

• Quality assurance of blown and cast polyethylene, PET, PP, and BOPP films in packaging manufacturing lines.
• Thickness uniformity evaluation of lithium-ion battery separators (e.g., PE/PP microporous membranes) prior to electrode lamination.
• Conformance testing of pharmaceutical blister foil laminates per USP <788> and Ph. Eur. 2.9.20.
• Process validation of paper calendering and coating operations in pulp-and-paper R&D labs.
• Material characterization of photovoltaic backsheet substrates, medical device barrier films, and aerospace-grade composites.

FAQ

What standards does the CHY-C2A comply with?
It conforms to ISO 4593, ISO 534, ISO 3034, ASTM D374, ASTM D1777, TAPPI T411, JIS K6250, and multiple GB/T standards—fully documented in the included Certificate of Conformance and test method library.

Can the instrument measure non-planar or corrugated samples?
No—it is designed exclusively for flat, compressible sheet materials. Curved, embossed, or highly irregular surfaces require alternative techniques such as confocal chromatic sensing or X-ray microtomography.

Is calibration traceability provided with purchase?
Yes. Each unit ships with a factory calibration certificate referencing NIST-traceable gauge blocks, along with instructions for periodic in-house verification per ISO/IEC 17025 Clause 7.7.

Does the system support multi-user environments with permission levels?
Yes. Lystem™ software enables administrator, supervisor, and operator roles with granular permissions for test execution, data export, calibration management, and audit log review.

What maintenance is required for long-term accuracy?
Annual verification of mechanical alignment, load cell linearity, and encoder resolution is recommended. Labthink offers certified service contracts including on-site recalibration and firmware updates aligned with evolving ISO/IEC 17025 requirements.