Lowrance EP-35 User Manual
Pub. 988-0154-441
EP-35 TH
Electronic Temperature Sensor
Installation Instructions
This instruction sheet tells how to install your EP-35 TH thru-hull
temp sensor and connect it to a NMEA 2000
LowranceNET network components. You must refer to your digital
gauge, sonar or GPS unit's manual for sensor operation instructions.
Caution:
Installing LowranceNET NMEA 2000 devices is significantly
different from installing earlier Lowrance components without
NMEA 2000 features. You should read all of the installation instructions before proceeding. You should decide where to install
all components before drilling any holes in your vessel.
Some sonar or GPS units may require a software upgrade to display
NMEA 2000 data correctly and a manual addendum describing how to
operate the sensor. You can download these free and get additional
information on the NMEA 2000
our web site, www.lowrance.com.
All Lowrance NMEA 2000 capable devices are either NMEA 2000 certified or certification is pending. See our web site for the latest product
status information.
compatible LowranceNET system at
network using
Temp
sensor
module
Blue female
NMEA 2000
connector
The EP-35 TH temperature sensor.
1
The EP-35 TH consists of a temp sensor module and a blue female
locking cable connector. The cable length from the connector to the
temp module is 10 feet (3 m). The sensor module contains a thermometer and electronic components that convert temp data to the NMEA
2000 data format.
Caution:
The maximum hull thickness for the EP-35 TH is 1-1/4" (31
mm).
The EP-35 TH Temp sensor is designed to operate in a temperature
range of 4° to 176° F (-20° to 80° C). This sensor is designed to measure
surface water temperature.
The EP-35 TH Temp, like the other Lowrance Electronic Probe (EP)
sensors, is designed only for use with a NMEA 2000 Network. It must
be connected to a NMEA 2000 network or it will not function.
Tools and Supplies
Your EP sensor packs with a T connector needed to attach it to a
LowranceNET NMEA 2000 network. If you are connecting to an existing LowranceNET network, those are all the electronic components you
need. If this is the first sensor you are connecting, you will also need a
one-time purchase of a LowranceNET Node Kit.
LowranceNET Node Kit for a NMEA 2000 network. Includes a 2-foot
extension cable, T connector, 120-ohm male terminator and 120-ohm
female terminator.
For complete instructions on setting up a new NMEA 2000 network or
expanding an existing one refer to the "Setup and Installation of NEMA
2000 Networks, General Information" document (part number 9880154-172) included with your EP-35 TH sensor. If that document is
missing it can be downloaded free from the Lowrance web site.
2
Recommended Tools and supplies
Recommended tools for this job include: drill, 1/8" (3 mm) drill bit for pilot
hole, 1-1/16 (27 mm) hole saw with a blade type appropriate for the composition of your transom.
Required supplies for this job include: high quality, marine grade above- or
below-waterline sealant/adhesive compound. We recommend 3M Polyurethane Marine Adhesive Sealant 5200 or an equivalent brand. The sensor is
packed with a lock nut used for mounting.
Installation
1. The EP-35 TH thru-hull temperature sensor can be mounted in any
location on the hull, with the most common application being on the
transom. Wherever you install it, make sure the temp module will be in
contact with the water at all times and that it does not interfere with
the boat's trailer.
Suggested
location
To install the EP-35 TH, use a hole saw to cut a 1-1/16" (27 mm) hole in
the transom. The hole should be below the waterline.
2. After you've determined the proper location on the transom for the
EP-35 TH, drill a 1/8" (3 mm) pilot hole from inside the transom.
3. The EP-35 TH requires a 1-1/16" (27 mm) hole. Using a hole saw,
drill from the outside of the transom to prevent the gel coat from
cracking on fiberglass boats. Use eye and face protection when drilling
the hole. Afterwards, clean the area around the hole with detergent or
alcohol and let it dry. This will remove any cutting debris establish a
good surface for the adhesive.
5. Using a high quality, marine-grade above- or below-waterline sealant/adhesive compound, apply a 1/8" (3 mm) bead of sealant around the
lip of the EP-35 TH housing.
6. Make sure the nut has been removed from the sensor module, then
from the outside of the transom, pass the EP-35 TH cable through the
hole and push the housing with sealant into it. Use a twisting motion to
squeeze out excess sealant. Remove excess sealant from the outside of
the transom before it dries.
3
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