16
2. Tools and Materials
Water-based antifouling paint (mandatory in salt water), safety goggles,
dust mask, electric drill with 10mm (3/8") or larger chuck capacity, drill bit
3mm or 1/8", hole saw: 51mm, sandpaper, mild household detergent or
weak solvent (such as alcohol), marine sealant, zip-ties, hole saw for hull
interior 60mm or 2-3/8" (installation in a cored fiberglass hull), fiberglass
cloth and resin or cylinder, wax, tape, and casting epoxy
Figure 1. Plastic Low Profile
3. Pretest
Connect the multisensor to the instrument and spin the paddlewheel. Check
for a speed reading (and the approximate air temperature if applicable). If
there is no reading or it is inaccurate, return the instrument to the place of
purchase.
4. Antifouling Paint
Marine growth can accumulate rapidly on the multisensors surface
reducing performance within weeks. Surfaces exposed to salt water must
be coated with antifouling paint. Use water - based antifouling paint only.
Never use ketone-based paint, since ketones can attack many plastics
possibly damaging the sensor.
It is easier to apply antifouling paint before installation, but allow sufficient
drying time. Reapply paint every 6 months or at the beginning of each
boating season. Paint the following surfaces (see Figure 2):