Coatmaster FLEX Non-Contact Dry Film Thickness Gauge
| Brand | Coatmaster |
|---|---|
| Origin | Switzerland |
| Model | FLEX |
| Measurement Principle | Advanced Photothermal (ATO) Method with DSP-Based Thermal Decay Analysis |
| Compliance | Designed for ISO 2808, ASTM D7091, and GLP/GMP-aligned process validation environments |
| Data Interface | Ethernet/RS-485, OPC UA & ERP/MES Integration Ready |
| Operating Mode | Real-time in-line or off-line measurement on wet or dry coatings |
| Sample State Compatibility | Uncured liquid coatings, powder coatings pre- and post-cure, thermoset/thermoplastic systems |
Overview
The Coatmaster FLEX is a non-contact, photothermal-based dry film thickness (DFT) gauge engineered for real-time, in-process metrology of organic and powder coatings—regardless of cure state. Unlike conventional magnetic induction, eddy current, or ultrasonic gauges—which require fully cured, solid films—the Coatmaster FLEX applies the Advanced Thermal Optics (ATO) principle: a precisely controlled optical pulse heats the coating surface transiently, while a high-speed infrared detector captures the spatially resolved thermal decay profile at standoff distance. The temporal characteristics of surface temperature relaxation are intrinsically linked to thermal diffusivity and geometric thickness; proprietary digital signal processing (DSP) algorithms convert raw thermal transients into traceable, NIST-traceable DFT values—calibrated against reference standards per ISO 2808 Annex B. This enables predictive dry-film measurement directly from the wet or uncured state, eliminating post-cure rework loops and enabling closed-loop process control in high-volume coating lines.
Key Features
- Non-contact, non-destructive measurement on wet, tacky, or partially cured coatings—no probe wear, no surface damage, no calibration drift from mechanical contact
- Real-time DFT output synchronized with production line speed (up to 120 m/min), compatible with PLC-triggered single-point or continuous scanning modes
- Integrated thermal referencing system compensates for substrate thermal mass, ambient fluctuations, and emissivity variations across metal, plastic, and composite substrates
- Ruggedized industrial housing rated IP65, designed for factory-floor deployment near ovens, spray booths, and powder application zones
- Factory-calibrated for common coating chemistries: acrylics, epoxies, polyurethanes, polyester powders, and hybrid systems—custom calibration kits available per formulation
Sample Compatibility & Compliance
The Coatmaster FLEX supports measurement on conductive and non-conductive substrates—including steel, aluminum, zinc-coated sheet, MDF, and injection-molded thermoplastics—without substrate-specific probe swaps. It complies with key international standards governing coating thickness verification: ISO 2808 (paints and varnishes—determination of film thickness), ASTM D7091 (nondestructive measurement of dry film thickness of nonmagnetic coatings on nonferrous metals), and EN ISO 19840 (corrosion protection of steel structures by protective paint systems). Its data acquisition architecture supports audit-ready logging aligned with GLP and GMP requirements, including user access control, electronic signatures, and tamper-evident timestamped records—fully compatible with FDA 21 CFR Part 11–compliant MES environments.
Software & Data Management
The Coatmaster Control Suite provides embedded real-time visualization, statistical process control (SPC) charting (X̄-R, Cpk, capability analysis), and automated pass/fail classification based on user-defined tolerance bands. All measurements are time-stamped, geotagged (via encoder input), and exportable in CSV, XML, or OPC UA format for direct ingestion into SAP QM, Siemens Opcenter, or Rockwell FactoryTalk. Historical datasets support root-cause analysis of thickness excursions—including correlation with spray gun parameters, oven dwell time, or powder feed rate—enabling continuous improvement via Six Sigma and Lean manufacturing workflows. Audit logs record operator ID, calibration status, environmental metadata, and firmware version—ensuring full traceability from raw material batch to finished part.
Applications
- Automotive OEMs: In-line monitoring of e-coat, primer-surfacer, and topcoat layers on body-in-white assemblies prior to baking
- Appliance manufacturing: Closed-loop control of coil-coated steel for refrigerators, ovens, and washing machines—ensuring corrosion resistance and gloss uniformity
- Powder coating lines: Real-time feedback during fluidized bed or electrostatic spray processes to minimize over-application and reclaim waste
- Architectural cladding: Verification of fluoropolymer (PVDF) and polyester powder coatings on aluminum extrusions exposed to UV and saline environments
- R&D laboratories: Accelerated formulation testing without waiting 24–72 h for full cure—reducing cycle time for new product qualification
FAQ
Can the Coatmaster FLEX measure thickness on curved or textured surfaces?
Yes—its wide-field optical design and adaptive thermal modeling accommodate radii down to 25 mm and surface roughness up to Ra 12.5 µm without recalibration.
Does it require daily recalibration?
No—factory calibration remains stable for ≥6 months under normal operating conditions; optional annual traceable recalibration is available via Coatmaster-certified service centers.
How is measurement accuracy verified?
Accuracy is validated using certified reference standards (NIST-traceable coated foils and step wedges) per ISO/IEC 17025 procedures; uncertainty budgets include contributions from thermal noise, optical alignment, and algorithmic interpolation.
Is it suitable for hazardous environments (e.g., ATEX zones)?
The standard FLEX unit is rated for Zone 2/22; ATEX-certified variants (II 2G Ex db IIB T4 Gb / II 2D Ex tb IIIC T135°C Db) are available upon request.
Can it integrate with legacy PLC systems?
Yes—native Modbus TCP, Profibus DP, and EtherNet/IP drivers are included; custom protocol mapping is supported via SDK documentation and engineering support.
