Compatible substrates
Ferrous metal
DONGRU DR120 Coating Thickness Gauge
Coating Thickness Gauges
DR120
For coating-thickness checks on compatible ferrous metal substrates.
Request technical guidanceCapabilities / DR120
Four confirmed points: material, measurement, readout and power. Full values are in the specification table below.
Ferrous metal
magnetic · 0-1500μm · ±(3%H+1.5μm)
0.1μm/1μm · 2.3-inch large backlit LCD
4.5VDC(three AAA alkaline batteries) · 126×64×28mm / 106g(excluding battery)
In practice
A one-piece magnetic gauge for coating checks on steel and iron parts: no cable, 1500 μm of range and 106 g in hand.

01
Magnetic induction
A single magnetic mode for coatings on ferrous parts, from 0 to 1500 μm, with no range switching to think about.
Ferrous substrates only — not for aluminium or other non-ferrous metals.
02
Integrated probe
The probe sits in the housing, so the gauge goes straight onto the part; an 18 × 15 mm spot covers most surfaces.
Minimum substrate thickness 0.4 mm.
03
106 g · 3 × AAA
1500
μm · measuring range
106 g in hand with a backlit 2.3-inch display, running on three AAA cells for long inspection rounds.
Stated accuracy is ±(3% of H + 1.5 μm); at curved parts the radius must be at least 5 mm convex or 25 mm concave.
Where it stopsFerrous metal substrates only. Not for aluminium or other non-ferrous metals, and not for metal wall thickness.
Model / DR120
Values come from one shared product record; confirm suitability for your measurement task.
Measuring range
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DR120
Tell us your material, expected range and site conditions. We can help check the instrument and probe fit.