Non destructive moisture indicator for boats and caravans. Capacitive measurement method with a high frequency dielectric field. Gives a quick indication of the moisture in the material. Application area: Discover blistering (osmosis) on glass fibre reinforced plastic boats, check moisture content before painting and varnishing, check the moisture content during the drying of moisture damage, discover dampness, water penetration and leakage and detect electrical cables or other concealed metal objects. Suitable for boat and caravan owners, boat and caravan owners, inspectors and salesman. Supplied complete with 9V battery.