SeeLevel Soul Tank Monitor Kit - Bluetooth & Cerbo GX Capable - 708-RBT

Want to know your tank levels without adding another panel to your wall? The SeeLevel Soul (708-RBT) is a small module that hides out of sight — behind a wall, in a cabinet, wherever's convenient — and sends your tank levels straight to your phone over Bluetooth. No display, no cutout, no wasted space.

It uses the same reliable external sensors as the rest of our SeeLevel lineup, so if you're happy checking levels from your phone (or you've already got a screen elsewhere, like a Victron display), you don't need a second gauge taking up wall space.

It's also the better pick if you've got more than 3 tanks or a propane tank to keep an eye on — our other option for Cerbo integration is the 709-N2K-NLP, which adds a display panel, but only covers 3 tanks and doesn't do propane.

The $249 base price includes:

• Garnet SeeLevel Soul 708-RBT module 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 NMEA2K/RV-C to VE.Can Adapter Cable 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 Soul's 4-pin RV-C connector 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.

• Add a Cerbo GX MK2 and optional touch screen, to complete your kit for a full monitoring system!

Free shipping to the Lower 48!

Features:

• Hides out of sight — no display, no cutout in your wall. It's set up over USB instead, and then you never think about it again.
• Connects to the free SeeLevel RV 2.0 app so you can check levels from your phone, anytime.
• Handles up to 7 tanks plus propane — more capacity than any other SeeLevel monitor we carry.
  • Note, this system only works with plastic tanks and will not work with metal tanks.
• Works with a Victron Cerbo GX too, using our adapter cable (sold separately) — so your tank levels can show up right on your Victron touch screen if you want them there.
• Sensors stick to the outside of the tank — no drilling, no holes, and nothing inside the tank to get gunked up over time.
  

⚠️ Have a Victron Cerbo GX? Read this first: The Soul and our 709-N2K-NLP panel talk to your Cerbo in two different "languages" (RV-C vs. NMEA2K), and they don't always play nice with the same battery setup. If your battery system already uses both of your Cerbo's connection ports — this is common with SOK or Epoch Elite batteries wired for "Victron communications" — the Soul won't work for you, and you'll want the 709-N2K-NLP instead.

Not sure which setup you have? Reach out and we'll help you figure it out before you order.

📖 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.

708-RBT Specs

• Monitors up to 7 tanks — Fresh, Grey, Black, Fresh 2, Grey 2, Black 2, and Grey 3 — plus your battery voltage
• Bluetooth connection to the SeeLevel RV 2.0 app (Google Play / App Store): check live levels from your phone or tablet
• No pump switch or alarm output on this model — it's just the tank data module
• Can wire into an existing propane sensor if your tank already has one built in*
• No drilling, no fouling: sensors stick to the outside of the tank and won't get gummed up by what's inside
• Senders can be stacked for tanks as tall as 34"
  
• Compact size: 3.65" W x 2.28" H x 0.98" D — mounts to a wall with screws
• Runs off your RV's 12V battery system
• Limited 1-year manufacturer warranty

Manuals & data sheets (Garnet Instruments):

• 708-RBT Installation Manual (PDF)
• Sender Manual (PDF)
• Spec Sheet / Brochure (PDF)

*Propane monitoring only works if your tank already has a built-in electrical sensor (common on larger rigs) — this doesn't include a sensor of its own, and it won't work with portable propane tanks.

Sender/Sensor Options

Our senders are flexible, self-adhesive strips that stick to the outside of your tank — no drilling required. We offer three sizes.

• Accuracy: +/- 8% or better
• Works on standard plastic holding tanks up to 3/8" thick — won't work on metal tanks
• Rated for 32°F to 140°F
• Can be trimmed to fit shorter tanks, or stacked for taller ones
• Limited 1-year manufacturer warranty
  

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.