Erichsen PIG455 Cross-Cut Coating Thickness Gauge

Overview

The Erichsen PIG455 Cross-Cut Coating Thickness Gauge is a precision mechanical instrument engineered for destructive, micro-geometric measurement of organic and inorganic coatings on non-conductive and non-magnetic substrates—including wood, concrete, plastics, fiberboard, and composites. Unlike electromagnetic or eddy-current gauges, the PIG455 operates on the standardized wedge-cut principle defined in AS 1580 Method 408.1 and aligned with ISO 2808 Annex B. It delivers traceable, operator-independent thickness values by converting the geometric projection of a precisely angled incision into quantitative micrometer-scale measurements. The device features a rigid anodized aluminum housing, integrated 50× measuring microscope with calibrated reticle (2 mm span, 100 divisions), dual support feet for blade guidance, and LED illumination for high-contrast visualization of cut edges. Its design prioritizes repeatability in field and laboratory environments where non-destructive methods fail due to substrate limitations or multi-layer complexity.

Key Features

• Mechanically robust construction with black anodized aluminum body (110 × 85 × 25 mm, 400 g) for long-term dimensional stability and corrosion resistance
• Interchangeable tungsten carbide cutting blades—calibrated for four distinct angular configurations (5.7°, 14°, 26.6°, 45°) enabling optimized resolution across thickness ranges from 2–2000 µm
• Integrated 50× optical microscope with engraved linear scale (0.02 mm per division) and coarse/fine focus adjustment for unambiguous edge identification
• LED-illuminated viewing path with momentary-on switch for consistent contrast under variable ambient lighting conditions
• No external power supply required—operates on standard 9 V alkaline battery with low-power consumption for >2000 measurement cycles per charge
• Pre-calibrated at factory; verification possible using NIST-traceable step standards or certified reference foils (e.g., ISO 2064 Class A)

Sample Compatibility & Compliance

The PIG455 is specifically validated for use on non-metallic, non-magnetic substrates where conventional magnetic induction or eddy current techniques yield unreliable results. It supports single- and multi-layer systems—enabling independent quantification of primer, basecoat, and clearcoat layers when cut geometry permits clear interface differentiation. The instrument conforms to key international coating testing standards: AS 1580 Method 408.1 (Australia), ISO 2808:2019 Annex B (Paints and varnishes — Determination of film thickness), and ASTM D7091–22 (Standard Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals and Non-Conductive Coatings on Non-Metallic Basis Materials). While not electronic-data-capable, its mechanical design ensures full compliance with GLP documentation requirements when paired with controlled procedural records and manual logbooks.

Software & Data Management

The PIG455 is a fully manual, analog measurement system with no embedded firmware, digital display, or data export functionality. All readings are recorded manually via reticle division counting and subsequent multiplication by model-specific conversion factors (e.g., 2 µm/div for No.6 blade). This architecture eliminates software validation overhead and ensures regulatory acceptability in environments governed by FDA 21 CFR Part 11 Annex 11 or EU GMP Annex 11—where electronic audit trails are not mandated for primary metrology tools. Users maintain measurement integrity through documented SOPs, operator qualification records, and periodic verification against certified thickness standards—fully compatible with ISO/IEC 17025 calibration management frameworks.

Applications

• Quality control of architectural coatings on concrete façades and timber substrates
• R&D evaluation of multi-layer automotive refinish systems on plastic bumpers and composite panels
• Failure analysis of delamination-prone powder coatings on MDF and PVC profiles
• Validation of curing uniformity in industrial wood finishing lines
• Third-party inspection for compliance with specification limits in infrastructure maintenance contracts (e.g., bridge deck coatings, marine antifouling systems)
• Supporting adhesion assessment per ISO 2409 when combined with cross-hatch evaluation protocols

FAQ

Is the PIG455 suitable for measuring coatings on steel or aluminum substrates?
No—it is explicitly designed for non-conductive, non-magnetic substrates. Electromagnetic gauges (e.g., Elcometer 456) are recommended for metallic surfaces.
How often should the cutting blade be replaced?
Tungsten carbide blades retain geometry for ~500–800 cuts under normal use; replacement is indicated when cut edges appear rounded or inconsistent under microscope inspection.
Can the PIG455 measure transparent or highly reflective coatings?
Yes—provided the cut edge exhibits sufficient contrast against the substrate; LED illumination and proper focusing mitigate reflectivity-related ambiguity.
Does the instrument require annual recalibration?
Not strictly required—but users must perform periodic verification using traceable reference standards before critical measurement campaigns, per ISO/IEC 17025 Clause 6.5.2.
What accessories are essential for routine operation?
Standard configuration includes No.6 blade (2–200 µm), 9 V battery, leather case, and operating manual; additional blades (No.1–No.5) are selected based on expected thickness range and substrate hardness.