SeeLevel II Tank Monitor Kit - Display Panel & Cerbo GX Capable - 709-N2K-NLP

Need a tank monitor with its own display, and know you're running a Victron Cerbo GX? The SeeLevel II 709-N2K-NLP is a simple, reliable panel built for exactly that setup — it shows your fresh, grey, and black tank levels right on the panel, and (with our adapter cable, sold separately) it can also send that data to your Cerbo GX so it shows up there too. It's the straightforward choice if you've got 3 tanks or fewer and don't need propane monitoring or Bluetooth — for more tanks, propane support, or a hidden setup with no display, take a look at the SeeLevel Soul (708-RBT) instead.

The $199 base price includes:

• Garnet SeeLevel 709-N2K-NLP display panel and pigtail.

Choose your options to build your kit:

• Add your choice of sender/sensors. We offer the 9" 710-AR2, 12" 710-ES3, and 16" 710-SS2 senders. Scroll down for full sizing details and recommendations based on your tank height.

• Add a custom NMEA2K RV-C to VE.Can adapter cable (6′) if you're connecting to a Victron Cerbo GX. This special cable has a 4-pin RV-C connector on one end that plugs into the back of the SeeLevel panel and the other end has an RJ45 connector that plugs into an available VE.Can port on your Cerbo GX. 
  • Note, you can extend the length of this cable with any high-quality RJ45 UTP cable and a RJ45 coupler – we’ve tested up to 50′ of extension cable.

Free shipping to the Lower 48!

Features:

• Sensors provide accurate and easy-to-read “percentage of full” readout.
• Can monitor any plastic tank up to 3/8″ (10 mm) thick.
• Sensors use Garnet’s proprietary external level sensing technology – the sensors/senders stick onto the exterior side of the tank so there is no drilling or modification necessary to the tank and you’ll never have any issues by debris build-up in the tank.
• Monitor up to 3x tanks – typically fresh, grey, and black tanks. 
• Note, this system only works with plastic tanks and will not work with metal tanks.
• Simple integration with the Victron Energy Cerbo GX via our custom cable add-on.

📖 Which model is right for you? Read our full comparison of the 709-N2K-NLP, Soul, and 709-BTP7 to see which one fits your rig and your Victron setup (if you have one).

709-N2K-NLP Specs

• Monitors battery voltage and up to three tanks (fresh water tank, grey water tank, black water tank)
• NMEA 2000 network compatible, tank levels and capacity are available on the NMEA bus for fresh, gray, and black tanks.
• Regularly scans senders every 10-15 seconds to keep tank level and alarm information on the NMEA 2000 bus current.
• Also Provides accurate tank level information using a percentage of full readout
• Tanks are monitored using Garnet’s proprietary external level sensing technology
  • This ends fouling problems caused by debris build-up in the holding tank
  • Detailed diagnostic information monitors sender operation
• Measures tanks from 5" up to 34" depending on the sensors you specify
• Tank senders connect to display via a common bus network topology which saves wiring costs
• Uses common industry connector for ease of installation and servicing
• The display requires 12 volts from the RV battery, the system will function from 11 volts to 16 volts
• The current drain is less than 200mA
• Panel Dimensions: 4" W x 2.8" H x 1" D
• Required Cutout Size: 3" W x 1.8" H
• Limited 1-year manufacturer warranty

Sender/Sensor Options

The Garnet SeeLevel II ES3 senders/sensors are a flexible, self-adhesive printed circuit board that is mounted to the outside of your holding tanks. We offer three sender options. Please check out the images that detail some of this information as well.

• Accuracy: +/- 8% or better, limited by resolution and tank height and shape.
• Sender material: flexible glass epoxy circuit board with conformal coating for circuit protection. Laminated on the back with 3M 300LSE bonding adhesive.
• Resolution: 3/8" (10 mm).
• Works with all standard plastic RV holding tanks. Will not work with metal tanks.
• Can read liquid levels through plastic tanks up to 3/8" (10 mm) thick
• Operating Temperature Range: 32 degrees to 140 degrees F.
• Limited 1-year manufacturer warranty.
• Senders can be cut down to size in between each "sensing pad" as long as a minimum of 3x "sensing pads" remain. See the illustration photo.
• The minimum gap between the bottom/top of the tank is 1/4", however, we recommend that the senders be installed 1/2" from the top and 1/2" from the bottom of the tank.
• Sender installation guide PDF

710-AR2 Sender

• 9" tall
• Sensing "pads" are 1 inch tall
• Fits tank heights from 3.5" to 10.5" and can be stacked for taller tanks.

710-ES3 Sender

• 12" tall
• Sensing "pads" are 1.5 inches tall
• Fits tank heights from 5.5" to 14"tall and can be stacked for taller tanks.

710-SS2 Sender

• 16" tall
• Sensing "pads" are 2 inches tall
• Fits tank heights from 7" to 17" tall and can be stacked for taller tanks.

Notes for Installers with NMEA 2000 Networks

This cable is designed for connecting a SeeLevel panel directly to a Victron Cerbo/GX device. If you have a complete NMEA 2000 network and try to use this cable in that environment, the resistor that is used on our adapter cable (on the connection to the SeeLevel side) will pass this resistance on to the bus and not work correctly.