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DeFelsko PosiTector FNDS Cabled Probe measures the individual thicknesses of both the paint and the zinc layers in a duplex coating system with a single reading. Duplex coating systems use a combination of two corrosion protection systems – typically paint or powder coating over galvanized steel (hot-dip, electro, or zinc spray metallizing). The resultant corrosion protection is superior to either protection system used independently.
In Duplex mode, the PosiTector 6000 FNDS utilizes both magnetic (ferrous) and eddy current (non-ferrous) principles simultaneously to calculate and display the individual paint and zinc layer thicknesses. The magnetic principle is used to measure the combined paint/zinc thickness over the ferrous substrate, and the eddy current principle is used to measure the paint thickness over the non-ferrous zinc coating. The zinc thickness is calculated by subtracting the paint thickness from the combined paint/zinc thickness measurement. When disabled, the gauge will operate like a conventional combination ferrous/non-ferrous instrument (similar to PosiTector FNS probe). Ideal for measuring non-magnetic coatings over steel and non-conductive coatings over non-ferrous metal substrates.
FNDS Range
0 – 60 mils (0 – 1500 µm)
Minimum Zinc Thickness
0.5 mil (13 µm)
Paint Layer Accuracy
| ± (0.05 mils + 1%) 0 – 2 mils | ± (1 µm + 1%) 0 – 50 µm |
| ± (0.1 mils + 1%) > 2 mils | ± (2 µm + 1%) > 50 µm |
Zinc Layer Accuracy
| ± (0.1 mils + 1%) 0.5 – 2 mils | ± (2 µm + 1%) 13 – 50 µm |
| ± (0.2 mils + 1%) > 2 mils | ± (4 µm + 1%) > 50 µm |
*Accuracies are stated as a fixed value plus a percentage of the gauge’s actual reading.
The PosiTector FNDS Probe is compatible with PosiTector Smartlink and fully interchangeable on both Standard and Advanced gauge bodies. Compatible with DeFelsko’s PosiSoft Software for viewing, analyzing, and reporting measurement data.
To select the proper probe for your application, please see DeFelsko’s Ordering Guide.
Stone Tucker Instruments is able to certify your PosiTector FNDS Probe. Click here to fill out our RMA Form.
