HERE'S HOW DO TO INSTALL IT?
1.) Install the annunciator lights & switch in your instrument panel.
A.) Drill two holes for the lights, (0.625" dia.). The
lights measure 0.705" x 0.95", and protrude 0.35".
Install the switch. Drill a 0.275" dia. hole.
B.) Affix the proper low fuel quantity lettering.
Right & Left Tank Instrument
Lettering can be easily inserted in the light's lens!
2.) Install the electronics.
A.) The electronics enclosure measures 3.5" x 2.25 x 1.25". Find an appropriate
spot under the instrument panel and install the enclosure using two #6-32 screws.
The centers of the mounting screws are 3.625" apart. Easy
wiring instructions are included!
3. Find the proper location for the sensor.
A.) Position your fuel tank in the approximate "level flight
B.) Temporarily attach a clear plastic hose to the fuel tank drain cock.
C.) Fill the tank (with WATER to be safe) to your pre-selected, low
fuel alarm quantity.
D.) Position the hose so that the top of the liquid in the hose,
is closest to your
internal fuel tank pick-up point.
E.) Mark the location for your sensor, near the top of the liquid
level in the hose.
An Alternate Location
(Coloring had been added to the water for
This gentleman has chosen a 3.0 Gallon alarm level for his right tank.
It is exactly 20 minutes of flight left at
4.) Install the optical sensors in your fuel tanks.
A.) Drill an appropriate diameter hole, and install the sensor.
A 0.475" dia. hole will suffice.
B.) Use Proseal (or an equivalent sealer) to further insure there are no fuel
A 12mm nut (1.0 pitch) is used to
secure the sensor in the tank. The nut goes on the inside.
For those who cannot get into the fuel tank to secure the sensor
nut, there is a work-around method that we can suggest. Fabricate a
bracket on the outside of the tank that will hold the sensor securely against
the tank wall with an adequate amount of pressure. Use the rubber gasket
in between the sensor and the tank wall to help seal the fuel from leaking.
Do not rely on this bracket pressure alone to keep the tank from leaking.
Use Proseal to seal the sensor from the outside of the tank after your bracket
is in place. You may even put it in between the gasket, tank wall, and
sensor to ensure a good seal. If you choose to utilize this suggested
method, it will be left to the builder/installer to ensure that this is a good
method for your application.
Sensor measures .75"
across flats of nut on the outside of the tank
The sensor protrudes
into the tank approximately 0.775"
(Mount the sensor only horizontally, not vertically. The
reason for this is because you do not want to have any fluid drops on the end of
the sensor when there is no liquid present. This may give false readings.
DO NOT put the sensor wires in any liquid, even for testing the
system! The wires are not totally liquid proof on the outside of the tank.
ONLY dip the tip of the sensor in liquid for testing the system. Be sure
not to scratch the tip of the sensor when handling it.
C.) Connect the sensor cables to the electronics.
"A VIEW FROM THE INSIDE THE TANK"
(User supplied Proseal sealant not shown)