Magnet Size:
10mm x 8mm magnet (#9061). An 8mm x 6mm magnet (#9052) may be
used. Check with your supplier.
Magnet Fit:
If the windlass is not pre-drilled, drill a hole 10.3mm (13/32”) diameter and
9.5mm (3/8”) deep into a spoke in the top of the chainwheel. The magnet and sensor must
be aligned so that the anchor rode passes between them. See Fig 8. The centre of the
magnet and the centre of the sensor may be up to 10mm (3/8”) out of direct alignment.
Magnet Seal:
Insert the magnet into the hole and cover with a minimum of 1mm of epoxy
to seal it from salt water. Failure to do this will impair the magnet’s durability. See Fig 9
Gap Between the Sensor and Magnet:
Grey or Flat 3 wire AutoAnchor Sensor (#9067 or #9045):
10mm x 8mm (#9061) Magnet: Minimum 35mm and maximum 50mm
8mm x 6mm (#9052) Magnet: Minimum 30mm and maximum 44mm
Magnet Polarity:
Not relevant.
Horizontal Windlasses Using Rope and Chain Rode
Chainwheel
spoke
Fig 8
Magnet
Magnet
Sensor
Fig 9
Seal with
minimum 1mm
epoxy.
Magnet
The standard sensor (#9051) is
cylindrical 35mm long and 10mm in
diameter. This sensor may be fitted
inside the windlass housing (See Fig
10a) or it can be fitted using a sensor
holder fixed to the deck to sit under
the chainwheel (See Fig 10b). The
AutoAnchor sensor holder (#9070) is not
included in the standard kit. Check with
your supplier.
Standard Sensor
Fig 10b
SENSOR INSTALLATION FOR HORIZONTAL WINDLASSES
Horizontal Windlasses Using Chain Only Rode
8
Sensor Holder
Magnet
Sensor
Fig 10a
Magnet
Sensor