The Garnet 710-SS2 is a 16-inch external sensor board designed for the SeeLevel II tank monitoring system. Unlike traditional RV tank sensors that mount inside the tank and become fouled with debris, this sensor adheres to the outside of your plastic holding tank, using capacitive sensing technology to detect fluid levels through the tank wall.External MountNo Drilling16" Tall
This is the longest standard sensor in the SeeLevel lineup, specifically designed for taller tanks. It's ideal for tanks between 7.5" and 18" tall as a single sensor, and can be stacked with a second 710-SS2 for tanks up to 34" tall.
Traditional internal sensors mount inside the tank where they contact waste, sewage, and debris. Over time, buildup on the probes causes inaccurate readings – a problem that gets worse over years of use. SeeLevel external sensors mount on the outside of the tank and sense fluid levels through the tank wall using capacitive technology. Because they never contact the tank contents, they don't foul, corrode, or give false readings due to debris buildup. The result: accurate, reliable readings for years without the maintenance headaches of traditional systems.
The SeeLevel sensor uses capacitive sensing technology to detect the difference in dielectric properties between air and liquid inside the tank. The sensor has multiple "sensing pads" along its length – each segment detects whether liquid is present at that level.
When you press a button on the SeeLevel monitor, it queries the sensor and receives data from each sensing pad. The display then shows the tank level as a percentage (0-100%), giving you far more accurate readings than traditional 1/4-increment systems.
• 709 Series – All models (709-P3, 709-P4, 709-RVC, 709-BTP7, etc.) • 714 Series – All models • 709-N2K – NMEA 2000 compatible models • SeeLevel Soul – Factory-installed systems (up to 7 tanks) Note: This sensor board is sold separately – monitor/display panel not included.
The 710-SS2 is the best choice for taller tanks. Here's how to select the right sensor:
Choose the sensor with the most segments for your tank height for best resolution and accuracy.
The 710-SS2 can be trimmed to fit shorter tanks:
The 710-SS2 requires a minimum of 3 sensing segments to function properly. Cutting the sensor shorter than 6" will result in the sensor not working. If your tank is shorter than 6", consider using the 710-AR2 (9") sensor which can be cut as short as 3".
For tanks taller than 18", two 710-SS2 sensors can be stacked vertically:
If you stack two sensors, they must be the same model. Do not mix a 710-SS2 with a 710-ES3 or 710-AR2. Each sensor type has different segment spacing and communication protocols.
• Position sensor 1/4" to 3/4" from tank top and bottom – this accounts for tank wall thickness and any bowing • Keep metal at least 1" away – metal near the sensor can affect readings • Route wires to the RIGHT – always route wires away from the sensor on the right side • Avoid air gaps – sensor must contact tank surface fully for accurate readings • Test before permanent adhesion – verify readings before you commit!
The 710-SS2 provides readings in approximately ±8% increments (or better), depending on tank height and shape. This is a dramatic improvement over traditional systems that only show 1/4 increments (25%, 50%, 75%, Full).
Resolution: 0.44" (approximately 11mm) per sensing segment. The sensor has multiple sensing pads – the more pads that remain after cutting to fit your tank, the more accurate your readings.
SeeLevel sensors use capacitive technology to sense through plastic tank walls. They will NOT work with metal tanks. The vast majority of RV holding tanks are roto-cast plastic. If your tanks are stainless steel or aluminum, this system will not work.
The 710-SS2 is ideal when you have:
When to use a different sensor: If your tank is shorter than 14", the 710-ES3 (12") may provide better resolution because it has more segments per inch. For very short tanks under 5", use the 710-AR2 (9").
Individually – one sensor per package. Order one sensor per tank you want to monitor (or two per tank if double-stacking).
The sensor has tabs at the top that are cut to program the sensor for specific tank types: • Fresh tank: Cut specific tab combination • Gray tank: Cut specific tab combination • Black tank: Cut specific tab combination • Galley tank: Cut specific tab combination • Top sensor (stacked): Also cut TOP tab Refer to installation manual for exact tab-cutting instructions for your configuration.
Single sensor formula: Measurable Space = Tank Height - 1/4" (top) - 1/4" (bottom) Round down to nearest 2" Stacked sensors formula: Measurable Space = Tank Height - 1/4" - 1/4" - 1/8" (gap) Round down to nearest 2" Divide equally between top and bottom sensors
Garnet Instruments Ltd. Sherwood Park, Alberta, Canada Garnet US Inc. Granbury, TX USA Website: garnetinstruments.com