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SEPARATE F/NF COATING THICKNESS GAUGE
The CM-8856FN coating thickness gauge uses separate F and NF probes to measure non-magnetic coatings on magnetic metal substrates and non-conductive coatings on non-magnetic metals. This coating thickness meter uses magnetic induction and eddy current measurement principles, with automatic substrate recognition to streamline inspections.
As a separate-probe coating thickness gauge, the CM-8856FN can reach measurement points that are difficult to access with an integrated sensor.
| Two Principles | Magnetic induction (F) and eddy current (N) measurement principles |
| Separate Probes | Separate F and NF probes for flexible access to measurement points |
| Substrates | Measures coatings on ferrous and non-ferrous metal substrates |
| Measurement Modes | Single and continuous measurement modes |
| Automatic Setup | Automatic substrate recognition and calibration-value memory |
| Data Memory | Stores up to 99 groups of readings |
| Units and Output | Selectable metric and imperial units; USB/RS-232 output, Bluetooth optional |
| Power-off | Manual and automatic power-off options |
The backlit LCD shows the measured value together with the maximum, minimum and average readings and the active substrate. The keypad carries the arrow keys together with READ and DEL, and the housing is marked with the model number. Two separate probes connect through coiled cables.
LCD with value, statistics and substrate | 
READ and DEL keys with the model marking | 
Separate probes with coiled cables |
F mode — Magnetic induction. Measures non-magnetic coatings on magnetic (ferrous) substrates. Typical examples include paint, lacquer, galvanizing, and porcelain enamel on iron or steel.
N mode — Eddy current. Measures non-conductive coatings on non-magnetic metal substrates. Typical examples include paint, varnish, anodizing, enamel, plastic, and powder coatings on aluminum, brass, or non-magnetic stainless steel.
Use the CM-8856FN paint thickness meter for coating inspections in manufacturing, metalworking, maintenance, and quality control. It supports routine checks on iron, steel, aluminum, brass, and non-magnetic stainless steel.
| Parameter | Specification |
|---|---|
| Model | CM-8856FN |
| Principle | Magnetic induction (F) and eddy current (N) |
| Probe | Separate F and NF probes |
| Range | 0–1,250 μm / 0–50 mil |
| Resolution | 0.1 μm / 1 μm |
| Accuracy | ±(1–3% of reading) or ±2.5 μm, per manufacturer specification |
| Minimum workpiece radius | F: convex 1.5 mm; concave 25 mm | N: convex 3 mm; concave 50 mm |
| Minimum measuring area | 6 mm |
| Minimum substrate thickness | 0.3 mm |
| Memory | 99 groups |
| Units | Metric / imperial |
| Operating conditions | 0–40 °C; 10–90% RH |
| Power | 2 × 1.5 V AAA batteries |
| Dimensions | 126 × 65 × 35 mm |
| Weight | Approx. 81 g, excluding batteries |
| Data output (Optional) | USB/RS-232; Bluetooth |
With separate probes on coiled cables, the CM-8856FN reaches recessed areas, curved surfaces, and parts that cannot be positioned under an integrated sensor. Continuous mode is useful for checking curved or small objects; the buzzer is disabled in continuous mode.