Airmar TRIDUCER DST800L Owner'S Manual & Installation Instructions Download Page 1

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Thru-Hull: 

Long, Flush, Retractable

Smart

 Sensor

TRIDUCER

®

 Multisensor:

DST800L

Depth Transducer:

B122

Patent http://www.airmar.com/patent.html

Application

• Recommended for a thick hull
• Bronze housing recommended for fiberglass or wood hull.

 

Never

 

install a bronze housing in a metal hull because 

electrolytic corrosion will occur.

• Best performance on a hull deadrise angle through 7°

Can accommodate up to a 12° deadrise angle

• Installed with a fairing, the sensor can accommodates a 

deadrise angle through 28

• Maximum hull thickness with a fairing and a 28

 deadrise angle 

is 47mm (1-7/8") (measured perpendicular to the water surface)

Pretest

Connect the insert to the instrument and spin the paddlewheel if 
any. Check for the approximate air temperature and any speed 
reading. If there is no reading(s), check all the connections and 
repeat the test. If there is still no reading(s) or it is inaccurate, 
return the product to your place of purchase.

Tools & Materials

Safety glasses
Dust mask
Ear protection
Water-based anti-fouling paint (

mandatory in salt water

)

Electric drill with 10mm (3/8") or larger chuck capacity
Drill bits:

3mm 

or

 1/8" (pilot hole)

11mm 

or

 7/16" (anti-rotation bolt hole)

Hole saw: 

51mm 

or

 2" (flush installation)

57mm 

or

 2-1/4" 

(installation with adapter ring)

Angle finder (some installations)
Band saw (faring installation) (blade must be very sharp)
Rasp 

or

 power tool (fairing installation)

Sandpaper
Mild household detergent 

or

 weak solvent (such as alcohol)

Marine sealant (suitable for below waterline)
Slip-joint pliers
Mallet (some installations)
Countersink tool (flush installation)
Grommet(s) (some installations)
Cable ties
Installation in a cored fiberglass hull (page 6)

Hole saw for hull interior:

Sensor:

min. 60mm

 or

 2-3/8"

Anti-rotation bolt: min. 19mm 

or

 3/4"

Cylinder, wax, tape, and casting epoxy

B122

Follow the safety precautions below to reduce 

the risk of poor product performance, property 

damage, personal injury, and/or death.

WARNING

: Always wear safety glasses, a dust mask, 

and ear protection when installing.

WARNING

Fairing

—The High-Performance Fairing 

requires an anti-rotation bolt. Failure to install the anti-

rotation bolt may result in the fairing rotating while the 

boat is underway. The effect may be violent 

movement and loss of steering. 

WARNING

Fairing

—The fairing must be installed 

parallel to the keel to ensure proper boat handling.

WARNING

Fairing

—Do not install a fairing that has 

been mis-cut. Replace it. Failure to do so may result in 

the fairing rotating while the boat is underway.

- Cutting the fairing at an angle greater than the 

28° 

maximum allowed will cut into the sensor and/or bolt 

pocket, thus weakening the fairing.

- Do not allow any gap between the fairing and the hull 

that is greater than 3mm (1/8"). When the boat is 

underway, water will enter any gaps and push against 

the fairing with considerable force.

WARNING

: Do not over tighten the hull nut and nut on 

the anti-rotation bolt, crushing the hull and/or fairing.

WARNING

: The O-rings must be intact and well 

lubricated to make a watertight seal.

WARNING

:

 

Always attach the safety wire to prevent the 

insert or blanking plug from backing out in the unlikely 

event that the cap nut fails or is screwed on incorrectly.

WARNING

: Immediately check for leaks when the 

boat is placed in the water. Do not leave the boat 

unchecked for more than three hours. Even a small 

leak may allow considerable water to accumulate.

CAUTION

: Never install a metal sensor in a vessel 

with a positive ground system.

CAUTION

: Never pull, carry, or hold the sensor by its 

cable. This may sever internal connections.

CAUTION

: The arrow on the top of the insert must point 

forward toward the bow to align with the water flow.

CAUTION

: Never use solvents. Cleaner, fuel, sealant, 

paint, and other products may contain solvents that can 

damage plastic parts, especially the transducer’s face.

IMPORTANT

: Read the instructions completely 

before proceeding with the installation. These 

instructions supersede any other instructions in your 

instrument manual if they differ.

Record the information found on the cable tag for future reference.

PN:___________________Date___________Frequency_________kHz

DST800L

TRIDUCER

®

Multisensor

OWNER’S GUIDE      &       INSTALLATION  INSTRUCTIONS

Summary of Contents for TRIDUCER DST800L

Page 1: ...tion when installing WARNING Fairing The High Performance Fairing requires an anti rotation bolt Failure to install the anti rotation bolt may result in the fairing rotating while the boat is underway...

Page 2: ...he first step Boat capable of speeds above 25kn 29MPH Review the installation location and operating results of similar boats before proceeding Fin keel sailboat Mount on or near the centerline and fo...

Page 3: ...at its thinnest dimension Figure 2 Cutting the fairing at an angle greater than 28 will cut into the sensor and or bolt pocket thus weakening the fairing 5 Recheck steps 1 through 4 Then cut the fairi...

Page 4: ...ll ensure there is sealant in the threads to seal the hull and to hold the hull nut securely in place 3 Apply a 2mm 1 16 thick layer of marine sealant to the following surfaces Fairing that will conta...

Page 5: ...ll a 3 mm or 1 8 pilot hole from inside the hull If there is a rib strut or other hull irregularity near the selected mounting location drill from the outside 2 Using the appropriate size hole saw cut...

Page 6: ...and spliced use Airmar s splash proof Junction Box No 33 035 and follow the instructions provided Removing the waterproof connector or cutting the cable except when using a water tight junction box wi...

Page 7: ...ing Plug To protect the insert use the blanking plug When the boat will be kept in salt water for more than a week When the boat will be removed from the water When aquatic growth buildup is suspected...

Page 8: ...ill prevent any water from freezing around the blanking plug possibly cracking it Replacement Sensor Parts The information needed to order a replacement sensor is printed on the cable tag Do not remov...

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