Why Choose the SeeLeveL II Tank Monitor?
Are you tired of unreliable tank readings that leave you guessing about your RV's water levels? Experience the peace of mind that comes with Garnet's SeeLeveL II monitoring system - the industry-leading solution with over 25 years of proven reliability.
Unmatched Accuracy
Digital technology provides precise percentage readings accurate to within ⅛ inch, showing exact tank levels instead of vague indicators.
No False Readings
External sensors eliminate common problems with traditional probes that get fouled by debris and tank buildup.
Zero Maintenance
No internal components to clean, maintain, or replace - saving you time and frustration year after year.
Easy Installation
Non-invasive mounting with no tank drilling required. External sensors attach with 3M specialized adhesive.
Universal Compatibility
Works with virtually all poly/plastic tanks and RV configurations, regardless of tank shape or size.
Made in North America
Quality manufacturing and reliable customer support you can count on for the long haul.
How It Works: Revolutionary Technology
Unlike traditional systems that use internal probes (which quickly become unreliable due to debris and buildup), the SeeLeveL II uses revolutionary external sensor technology. These sensors mount on the outside of your tanks using specialized 3M adhesive, measuring levels with precision while completely eliminating false readings.
The system's digital display shows tank levels in percentage increments from 0-100%, giving you the exact information you need rather than vague 1/4, 1/2, or 3/4 readings found in conventional systems.
SeeLeveL II vs. Traditional RV Monitors
SeeLeveL II System
- Accurate digital readings (0-100%)
- External sensors - no contact with tank contents
- No false readings from buildup
- Works with all tank materials
- One-time installation - no maintenance
- High precision (±⅛ inch)
- Multiple tank configurations available
- Bluetooth connectivity options
Traditional Probe Systems
- Limited readings (Empty, 1/3, 2/3, Full)
- Internal probes exposed to tank contents
- Frequent false readings from buildup
- Limited compatibility with some tanks
- Regular cleaning and maintenance required
- Low precision
- Limited configuration options
- Basic functionality only
All SeeLeveL II Products
Garnet 709-2 SeeLevel (2) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- battery voltage
$206.40
In Stock
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Garnet 709-2P SeeLevel (2) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- battery voltage
- includes water pump switch
$209.65
In Stock
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Garnet 709 SeeLevel (3) RV Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- lpg level (using existing lp sensor)
$255.95
In Stock
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Garnet 709-3 SeeLevel RV (3) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
$254.02
In Stock
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Garnet 709-P3 SeeLevel (3) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- includes water pump switch
$254.02
In Stock
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Garnet 709-P3W SeeLevel (3) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- lpg level (using existing lp sensor)
- includes water pump switch
$254.02
In Stock
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Garnet 709-HP3W SeeLevel (3) Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- lpg level (using existing lp sensor)
- includes water pump switch
- includes hot water tank switch
$254.02
In Stock
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Garnet 709-BTP7 SeeLevel RV Tank Monitoring System with Bluetooth
Monitors up to 7 tanks including:
- fresh tank
- black tank
- grey tank
- battery voltage
- lpg level (using existing lp sensor)
- includes water pump switch
- includes hot water tank switch
$259.32
In Stock
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Garnet 709-RVC SeeLevel II 3 Tank Monitoring System with Alarm
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- lpg level (using existing lp sensor)
- includes an RV-C network interface
- programmable common alarm output.
$384.89
In Stock
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Garnet 709-RVC-PM SeeLevel II 3 Tank Monitoring System with Alarm
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- includes water pump switch
- includes an RV-C network interface
- programmable common alarm output.
$383.95
In Stock
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Garnet 709-RVC-NLP SeeLevel II 3 Tank Monitoring System with Alarm
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- includes an RV-C network interface
- programmable common alarm output.
$385.95
In Stock
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Garnet 709-N2K-NLP SeeLevel II Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- battery voltage
- integrates w/ NMEA 2000 systems
$384.89
In Stock
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Garnet 709-4 SeeLevel (4) RV Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- galley tank
- battery voltage
$312.24
In Stock
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Garnet 709-4P SeeLevel (4) RV Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- galley tank
- battery voltage
- includes water pump switch
$312.24
In Stock
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Garnet 709-4LP SeeLevel (4) RV Tank Monitoring System
Monitors:
- fresh tank
- black tank
- grey tank
- galley tank
- battery voltage
- lpg level (using existing lp sensor)
$287.08
In Stock
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Garnet 709 SeeLevel RV Tank Monitor Only
Tank monitor designed for accurate level measurement of motorhomes and trailers with three holding tanks. Monitors battery voltage, fresh, grey, black water and LPG levels.
$95.95
In Stock
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Garnet 709-2P SeeLevel Monitor
Tank monitor designed for accurate level measurement of motorhomes and trailers with two holding tanks. Monitors battery voltage, fresh and black water levels.
$95.95
In Stock
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Garnet 709-P3 SeeLevel II 3 Tank Monitor - Monitor Only
Tank monitor that works with the 709-P3 SeeLevel II Tank Monitoring System. Features a 3-way pump switch on the display panel.
$95.95
In Stock
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Garnet 709-P3W SeeLevel II 3 Tank Monitor - Monitor Only
Tank monitor for the 709-P3W SeeLevel II System. Includes 3-way pump switch with connector for more wiring options.
$95.95
In Stock
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Garnet 709-4 SeeLevel II Monitor Only
Tank monitor for 5th wheel trailers with four holding tanks. Monitors battery voltage, fresh, grey, galley and black water levels.
$95.95
In Stock
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Garnet 709-4P SeeLevel II 4 Monitor - Monitor Only
Tank monitor for 5th wheel trailers with four holding tanks. Includes a single-pole pump switch on the display panel.
$95.95
In Stock
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Garnet 709-4LP SeeLevel II 4 Tank Monitoring System - Monitor Only
Tank monitor for 5th wheel trailers with four holding tanks. Includes a single-pole pump switch on the display panel.
$95.95
In Stock
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Garnet 709-HP3W SeeLevel II 3 Monitor - Monitor Only
Tank monitor for motorhomes and trailers with three holding tanks. Includes a 3-way pump switch with connector for more wiring options.
$159.67
In Stock
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Garnet 709-BTP7 SeeLevel II RV Tank Monitor with Bluetooth - Monitor Only
Tank monitor with Bluetooth connectivity. Includes a 3-way pump switch with connector for more wiring options.
$139.98
In Stock
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Garnet 709-RVC SeeLevel II 3 Tank Monitor - Monitor Only
LED digital display for motorhomes and trailers with three holding tanks. Easy to read and accurately monitors batteries, fresh, gray, black, and kitchen tanks.
$248.74
In Stock
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Garnet 709-RVC-PM SeeLevel II 3 Tank Monitor with Alarm - Monitor Only
Tank monitor with RV-C network interface, common alarm output and momentary pump switch.
$248.74
In Stock
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Garnet 709-RVC-NLP SeeLevel II 3 Tank Monitoring System with Alarm - Monitor Only
Tank monitor with RV-C network interface and programmable common alarm output.
$248.74
In Stock
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Garnet 709-N2K-NLP-MO SeeLevel II Tank Monitoring System - Monitor Only
Tank monitor for 5th wheel trailers with four holding tanks. Monitors battery voltage, fresh, grey, galley, and black water levels.
$220.34
In Stock
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Garnet 710-AR2 SeeLevel Sender Board - 9"
Flexible, self-adhesive printed circuit board that is mounted to the outside of your holding tanks. May be cut from 9" down to 3" to match the height of your tanks.
$63.50
In Stock
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Garnet 710-ES3 SeeLevel Sender Board - 12"
Flexible, self-adhesive printed circuit board mounted to the outside of holding tanks. Fits tank heights from 5.5" to 14", and up to 25" with stacked senders.
$63.50
In Stock
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Garnet 710-SS2 SeeLevel Sender Board - 16"
Flexible self-adhesive printed circuit board which is mounted to the outside of holding tanks. Can be cut to length to match tank height. Tanks over 17 inches may be double stacked.
$63.50
In Stock
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Garnet 709-filler SeeLevel 709 Filler Plate
Allows you to cover previous cut-outs when retrofitting a 709 SeeLevel series monitor.
$10.25
In Stock
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Garnet 709-gasket SeeLevel 709 Gasket
Used to prevent the 709 SeeLevel monitor from shorting when mounting to a metal surface.
$10.25
In Stock
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Feature Comparison Chart
| Feature | Available Models |
|---|---|
| 2-Tank Monitoring | 709-2, 709-2P |
| 3-Tank Monitoring | 709, 709-3, 709-P3, 709-P3W, 709-HP3W, 709-BTP7, 709-RVC, 709-RVC-PM, 709-RVC-NLP, 709-N2K-NLP |
| 4-Tank Monitoring | 709-4, 709-4P, 709-4LP |
| Water Pump Control | 709-2P, 709-P3, 709-P3W, 709-HP3W, 709-BTP7, 709-RVC-PM, 709-4P, 709-4LP |
| Water Heater Switch | 709-HP3W, 709-4LP |
| LPG Monitoring | 709, 709-P3W, 709-HP3W, 709-BTP7, 709-RVC, 709-4LP |
| Battery Level Monitoring | All Models |
| Bluetooth Connectivity | 709-BTP7 |
| RV-C Network Compatible | 709-RVC, 709-RVC-PM, 709-RVC-NLP, 709-N2K-NLP |
Technical Specifications
Operating Voltage
12V DC
Display Resolution
0-100% in approximately 1% increments
Sensor Accuracy
±⅛ inch
Temperature Range
-40°F to +140°F
Display
LED with day/night settings
Warranty
Limited 1-Year Manufacturer Warranty
Installation Guide
While professional installation is recommended for optimal performance, the SeeLeveL II is designed for straightforward installation:
- Plan the installation: Identify tank locations and determine sensor placement
- Prepare tank surfaces: Clean the exterior tank surfaces where sensors will be attached
- Mount the sensors: Apply the 3M adhesive to attach sensors to clean, dry tank surface
- Run the wiring: Connect sensor wires to the display unit (can use existing wiring from old system)
- Install the display panel: Mount the display panel in your desired location
- Connect power: Hook up to your RV's 12V DC power system
- Test the system: Verify all readings are accurate before finalizing installation
Note: Complete installation instructions are included with each unit. Professional installation is recommended for those without electrical experience.
Real Benefits for Your RV Lifestyle
- Eliminate Tank Overflow Surprises: Know exactly when your tanks need attention
- Extend Your Trips: Better resource management with accurate readings
- Reduce Maintenance Costs: No more cleaning or replacing corroded internal probes
- Plan With Confidence: Make informed decisions about water usage and dump station visits
- Simple Trip Planning: Know your exact capacity status at all times
Choose the Monitoring System RV Professionals Trust
With over 200,000 installations across North America, the Garnet SeeLeveL II has earned its reputation as "the gauge that works." Don't settle for guesswork when it comes to your RV's most critical systems.
Upgrade to the SeeLeveL II today and experience the difference accurate tank monitoring can make for your RV adventures!
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