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INTEGRAL F/NF COATING THICKNESS GAUGE
The CM-8825 series is an integral, built-in probe coating thickness gauge for nondestructive measurement of coatings on ferrous and non-ferrous metal substrates. Choose the FN model for both measurement methods, the F model for magnetic induction, or the N model for eddy current. Designed for convenient one-hand operation, the CM-8825 works as an automotive coating thickness gauge and paint thickness meter for shop-floor, field, and inspection use.
Single and continuous measurement modes; continuous mode is useful for curved or small objects.
Automatic substrate recognition and automatic storage of calibration values.
Metric and imperial units, low-battery alert, and manual or automatic power-off.
Audible operation prompt; the buzzer is off during continuous measurement.
Integral probe design for one-hand operation, with a large contact area for stable, repeatable readings.
Every part the operator touches is designed for routine coating inspection — the reading and the controls on one integral body.
Measurement display — the coating thickness reading with mode and unit indicators | 
Control keys — S/C, um/mil, F/NF, adjustment keys and ZERO on the integral body |
Three built-in probe configurations cover magnetic induction, eddy current, or both.
| Model | Built-In Probe(s) | Measurement Principle | Included Calibration Base(s) |
|---|---|---|---|
| CM-8825FN | F + NF | Magnetic induction (F) + eddy current (NF) | F iron base + NF aluminum base |
| CM-8825N | NF | Eddy current (NF) | NF aluminum base |
| CM-8825F | F | Magnetic induction (F) | F iron base |
F probe — Magnetic induction — Measures non-magnetic coatings on magnetic substrates such as iron and steel. Typical applications include paint, galvanizing, lacquer, porcelain enamel, and phosphate coatings.
NF probe — Eddy current — Measures non-conductive coatings on non-magnetic metals such as aluminum, brass, and non-magnetic stainless steel. Suitable coatings include anodizing, varnish, paint, enamel, plastic, and powder coatings. Together, the probes make the CM-8825 an F/NF coating gauge for mixed-metal inspection.
| Measurement principle | Magnetic induction (F) and eddy current (NF) |
| Probe design | Integral / built-in probes; model dependent |
| Measurement range | 0–1,250 μm / 0–50 mil (standard range) |
| Resolution | 0.1 μm / 1 μm |
| Accuracy | ±(1–3% of reading) or ±2.5 μm |
| Minimum workpiece radius | F: convex 1.5 mm / concave 25 mm; NF: convex 3 mm / concave 50 mm |
| Minimum measuring area | 6 mm |
| Minimum sample thickness | 0.3 mm |
| Unit conversion | Metric / imperial |
| Battery indicator | Low-battery alert |
| Power-off | Manual and automatic |
| Operating temperature | 0–50 °C |
| Operating humidity | 80% RH or less |
| Power supply | 4 × 1.5 V AAA (UM-4) batteries |
| Dimensions | 126 × 65 × 27 mm |
| Weight | 81 g, excluding batteries |
RS-232 connection cable and software
Bluetooth adapter and software