SeeLevel II Tank Monitor Kit - Bluetooth & Display Panel - 709-BTP7

The SeeLevel II 709-BTP7 is Garnet's most feature-rich stand-alone display — a real, physical panel with a 3-digit LED readout, a built-in pump switch, an alarm output, and Bluetooth connectivity to check every tank from your phone. It's the pick if you don't have a Victron Cerbo GX in your system and want the most capable, all-in-one panel: display, pump switch, and alarms in a single unit. If you want a dedicated wall-mounted monitor and you've got a more complex tank setup — dual fresh tanks, multiple grey tanks, whatever your rig throws at you — this is the panel built for it.

The $149 base price includes:

• Garnet SeeLevel II 709-BTP7 display panel and pigtail.
  

Choose your sensors 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.
  

Free shipping to the Lower 48!

Features:

• Monitors up to 7 tanks: 2 Fresh, 3 Grey, and 2 Black — plus battery voltage and LPG level*. 
  • Note, this system only works with plastic tanks and will not work with metal tanks.
• Built-in pump switch (SPST) wired directly into the panel — no separate switch needed.
• Alarm output included, so you can trigger an external alert when a tank hits a set level.
• Bluetooth-enabled: pair with the free SeeLevel RV 2.0 app for real-time percentage readouts and diagnostic info from your phone or tablet.
• 3-digit LED display shows accurate "percentage of full" readings at a glance.
• Sensors use Garnet's proprietary external level-sensing technology — senders stick to the outside of the tank, so there's no drilling or tank modification, and no debris fouling issues.
  
• Note: this panel does not integrate with a Victron Cerbo GX. If you need Cerbo/NMEA2K or RV-C integration, see our 709-N2K-NLP panel or the SeeLevel Soul instead.

*LPG support is limited to non-portable/fixed LPG tanks that already have a built-in electrical sensor (typical on larger rigs) — the monitor does not include an LPG sensor itself, and it currently can't read portable metal propane tanks.

📖 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-BTP7 Specs

• Monitors up to 7 tanks (2 Fresh, 3 Grey, 2 Black), battery voltage, and LPG level*
• Bluetooth capability connects to the SeeLevel RV 2.0 app for real-time percentage readouts
• Built-in pump switch (SPST) — pump wiring must be fused at 10A; a relay is required for pump loads over 10A
• Alarm output for connecting an external alert device
• Panel Dimensions: 4" W x 2.8" H x 1" D (102mm x 71mm x 25mm)
• Required Cutout Size: 3" W x 1.8" H
• Tanks are monitored using Garnet's proprietary external level-sensing technology
  • Ends debris-fouling problems caused by build-up inside the holding tank
  • Displays diagnostic information for each sender to help catch sludge buildup or sender damage early
• Senders connect via a common bus network topology, saving wiring costs
  
• Requires 12 volts from the RV battery; functions from 11V to 16V
• All power circuits must be fused; an appropriately rated fuse is the installer's responsibility if not included
• Limited 1-year manufacturer warranty

Manuals & data sheets (Garnet Instruments):

• 709-BTP7 Installation Manual v2.3 (PDF)
• Sender Manual — 710-AR2 / 710-ES3 / 710-SS2 (PDF)
• SeeLevel Holding Tank Series Brochure / Spec Sheet (PDF)

Sender/Sensor Options

The Garnet SeeLevel II senders/sensors are a flexible, self-adhesive printed circuit board that mounts to the outside of your holding tanks. We offer three sender options — check the images for sizing guidance.

• Accuracy: +/- 8% or better, limited by resolution and tank height/shape.
• Sender material: flexible glass epoxy circuit board with conformal coating, laminated with 3M 300LSE bonding adhesive.
• Resolution: 3/8" (10 mm).
• Works with all standard plastic RV holding tanks — will not work with metal tanks.
• Reads liquid levels through plastic tanks up to 3/8" (10 mm) thick.
• Operating Temperature Range: 32°F to 140°F.
• Can be cut down between "sensing pads" as long as a minimum of 3 pads remain.
• Minimum gap from tank top/bottom is 1/4"; we recommend installing 1/2" from the top and 1/2" from the bottom.
• Limited 1-year manufacturer warranty.
  

710-AR2 Sender 

• 9" tall
• 1" sensing pads
• Fits tank heights 3.5"–10.5" (stackable for taller tanks)

710-ES3 Sender

• 12" tall
• 1.5" sensing pads
• Fits tank heights 5.5"–14" (stackable for taller tanks)

710-SS2 Sender

• 16" tall
• 2" sensing pads
• Fits tank heights 7"–17" (stackable for taller tanks)