Overview

The Garmin 010-11326-00 is a GFL 10 fluid level analog adapter that puts your tank level data onto an NMEA 2000 network while keeping the existing analog sender or gauge in place. It is powered from the NMEA 2000 bus (9–16 Vdc), is NMEA 2000 certified (LEN 2, 100 mA), and has a total cable length of 16 ft (4.9 m).

The module is sealed to IEC 529 IPX7 and is meant for locations that may see washdowns rather than regular submersion. It measures 24.7 x 17.0 x 78.6 mm, weighs 365 g, and uses a thermoplastic rubber overmold with a PVC cable jacket and PVC overmolds at the connectors.

Once installed and configured, tank levels can be shown on compatible NMEA 2000-connected Garmin displays. The adapter supports tank setup and calibration so the readings match your boat’s sender and tank shape.

Key features

• Converts analog fluid-level information from an existing resistive sender or analog gauge into NMEA 2000 data for display on compatible Garmin devices on the network.
• NMEA 2000 certified and bus-powered (9–16 Vdc), with 1 W max power usage and LEN 2 (100 mA) for network planning.
• IPX7 sealing to IEC 529 for typical marine washdown exposure, with an operating temperature range of -15°C to 70°C (5°F to 158°F).
• 16 ft (4.9 m) total cable length and a small module footprint (24.7 x 17.0 x 78.6 mm) to tuck behind a panel or near a tank sender.
• Supports fluid type assignment, tank numbering, tank capacity entry, and level calibration using a minimum of two calibration points.

Compatibility and fit

This adapter is intended for boats with an NMEA 2000 backbone and a fluid level sender or an analog gauge that represents tank level. It connects into the network through a standard NMEA 2000 T-connector and broadcasts fluid level information over the backbone.

For cleaner wiring, mount it within 173 in. (4.4 m) of the analog gauge or the fluid-level sensor so you can reach without extending bare-wire connections. Keep the module at least 2 in. (5 cm) from a magnetic compass to avoid interference.

Installation and setup

You can wire the GFL 10 either at the back of the analog gauge or directly at the sender. When wiring to an analog gauge, the blue wire goes to the gauge sensor terminal, the white wire goes to gauge power/ignition, and the black wire goes to ground; the yellow and red wires are unused. When wiring directly to a resistive sensor, the blue wire goes to the sender terminal and the black wire goes to ground; the white, yellow, and red wires are unused.

After making connections, cover any exposed conductors with heat-shrink tubing. If wiring directly at a fuel tank sender, make the sender connections before connecting the adapter to the NMEA 2000 network to reduce spark risk near the tank.

NMEA 2000 integration

Connect the adapter into the NMEA 2000 backbone using the included T-connector. If the adapter cannot reach the backbone directly, a separate drop cable can be used up to 20 ft (6 m).

If your boat already has an NMEA 2000 network, it should already be powered. Keep the network to a single power source, as adding another power connection can cause network issues.

Configuration and calibration

Configuration is handled from a compatible Garmin display through the NMEA 2000 device list. You can set the fluid type, assign a tank number, and enter the tank capacity so the network data matches the tank being monitored.

Fluid level calibration is required, and it uses at least two calibration points. Adding more calibration points improves accuracy, especially on tanks that do not read linearly. If the reading shifts with engine RPM when connected through a gauge, the gauge type setting can be adjusted between Auto Detect, 1 Coil, and 2 Coil.

Use on board

This adapter is a good match for boats that want digital tank levels on a chartplotter or instrument display while leaving existing senders and, when applicable, the original analog gauge in place. It also works well for multi-tank boats, where each tank can be identified with its own tank number and fluid type during setup.