Best Coating Thickness Gauges in 2026: Buyer’s Guide
A coating thickness gauge measures the thickness of paint, powder coating, and plating on metal — without damaging the surface. This complete guide explains how they work and compares the real Marmonix coating thickness gauge models so you can choose the best one in 2026.
How Coating Thickness Gauges Work
Magnetic gauges measure coatings on ferrous (steel) substrates, while eddy-current gauges measure on non-ferrous metals. Dual gauges auto-detect the substrate and switch automatically.
Key Specifications to Compare
- Substrate: ferrous, non-ferrous, or both (auto-detect).
- Range (e.g. 0–1250 µm or 0–1800 µm).
- Accuracy and easy foil calibration.
- Data: memory, PC software, printing.
Marmonix Coating Thickness Gauges Compared
| Model | Substrate | Range | Highlights | Best for |
|---|---|---|---|---|
| MCT 801 | Magnetic & non-magnetic (auto) | 0–1800 µm | Auto substrate detection, multiple modes, backlit LCD | Everyday QA & inspection |
| MHT-820-DSP | Ferrous & non-ferrous | 0–1250 µm | ±(1%H+1), thermal printer, PC software, 1560 memory, 10h battery | Lab & documentation-heavy QA |
Model Strengths
MCT 801 — dual-mode gauge with automatic substrate detection (magnetic and non-magnetic), 0–1800 µm range, multiple measurement modes, and a backlit LCD; a versatile everyday tool. MHT-820-DSP — adds a built-in thermal printer, PC software, 1560-reading memory, and 10-hour battery for documentation-heavy quality control. Compare all Marmonix coating thickness gauges.