Superior technology makes the difference
Why does SeeLeveL perform so well in comparison to other monitoring systems? The sender is externally mounted to the tank eliminating sewage buildup that causes false readings on probe-type sensors. With excellent precision, tank levels are displayed in percent-full. A wide range of models is available for various applications.
Although the SeeLeveL system was originally designed for RVs, it will also work on holding tanks in marine vessels, ice houses, tiny houses, and more.
NEW OEM OPTION!
Scroll down for details of available systems, or parts you require.
2 -TANK MONITOR SERIES
This series will monitor up to two holding tanks as well as the battery voltage. The level is shown in percent of a full tank on an easy-to-read LED display. Will work on most plastic or fiberglass holding tanks that contain any water-soluble products. Will not work on metal tanks.
709-2P Features
Monitors: Fresh, Black, Battery voltage
LPG: no
Switches: 3-way pump switch/single-pole
- Details
- Resources
System includes: (1) display monitor, (2) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
3 -TANK MONITOR SERIES
This series will monitor up to three holding tanks as well as the battery voltage. The level is shown in percent of a full tank on an easy-to-read LED display. Will work on most plastic or fiberglass holding tanks that contain any water-soluble products. Will not work on metal tanks.
709 Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: Connects to an existing LPG sensor
Switches: no
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-P3 Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: no
Switches: 3-way pump switch/single-pole
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-P3W Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: Connects to an existing LPG sensor
Switches: 3-way pump switch/single-pole
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-HP3W Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: Connects to an existing LPG sensor
Switches: 3-way pump switch/single-pole, Water Heater switch/single pole-double throw
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-BTP3 Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: Connects to an existing LPG sensor
Switches: 3-way pump switch/single-pole
Other: Bluetooth enabled, programmable alarm output
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
RV-C INTERFACE SERIES
The RVC series below will monitor up to three holding tanks as well as the battery voltage. They also work with RVs that are equipped with RV-C Interface monitoring systems. The level is shown in percent of a full tank on an easy-to-read LED display. Will work on most plastic or fiberglass holding tanks that contain any water-soluble products. Will not work on metal tanks.
709-RVC Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: Connects to an existing LPG sensor
Switches: none
Other: RV-C Interface compatible
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-RVC NLP Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: no
Switches: none
Other: RV-C Interface compatible
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-RVC PM Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: no
Switches: 3-way pump switch/single-pole
Other: RV-C Interface compatible
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
NMEA SERIES
709-N2K NLP Features
Monitors: Fresh, Grey, Black, Battery voltage
LPG: no
Switches: no
Other: The 709-N2K NLP is NMEA 2000 network compatible, the tank levels and capacity are available on the NMEA bus for multiplex systems like Victron.
- Details
- Resources
System includes: (1) display monitor, (3) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
4-TANK monitor SERIES
Designed for RVs or Marine Vessels with four holding tanks as well as the battery voltage. The level is shown in percent of a full tank on an easy-to-read LED display. Will work on most plastic or fiberglass holding tanks that contain any water-soluble products. Will not work on metal tanks.
709-4 Features
Monitors: Fresh, Grey, Black, Galley, Battery voltage
LPG: no
Switches: none
- Details
- Resources
System includes: (1) display monitor, (4) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
709-4P Features
Monitors: Fresh, Grey, Black, Galley, Battery voltage
LPG: no
Switches: 3-way pump switch/single-pole
- Details
- Resources
System includes: (1) display monitor, (4) tank senders, (1) pigtail, (4) mounting screws
Display option: Multiple displays can be added to the system. To purchase just a display, select the “Display” button.
Senders: When you purchase, you can select from three (3) sender option sizes.
INDIVIDUAL SENDERS AND ACCESSORIES
710-AR Sender
Standard Size
Fits tank heights: 3.5″ – 10.5″ (single) up to 19.5″ (dual senders). See [AR,ES2] sender manual for more information.
Resolution: 1/4“ (6 mm)
Dimensions: 9″ high x 2.45″ wide (height does not include tabs)
- Details
- Resources
The standard sender comes with all systems and will accommodate most holding tanks. This model has the best resolution and is optimal for low-profile tanks.
USA STORE
CANADA
Call: 1-800-617-7384, option 2
710-ES2 Sender
Optional Size Medium
Fits tank heights: 5.5″ – 14″ (single) up to 25″ (dual). See [AR,ES2] sender manual for more information.
Resolution: 3/8″ (10 mm)
Dimensions: 12″ high x 2.45″ wide (height does not include tabs)
- Details
- Resources
This optional sender will accommodate medium height tanks and it the best option if your tanks are taller than 10.5"
USA STORE
CANADA
Call: 1-800-617-7384, option 2
710-SS Sender
Optional Size Tall
Fits tank heights: 7″ – 18″ (single) up to 34.5″ (dual). See [JS,ES,SS] sender manual for more information.
Resolution: 1/2″ (13 mm)
Dimensions: 16″ high x 2″ wide (height does not include tabs)
- Details
- Resources
The optional sender will accommodate taller tanks and is the best option for tanks more than 26" tall.
USA STORE
CANADA
Call: 1-800-617-7384, option 2
709 Filler Plate
The 709 Filler Plate allows you to cover previous cut-outs that are too large when retrofitting a SeeLeveL II 709 Series monitor.
Dimensions: 6“ Wide x 4.75“ High
USA STORE
CANADA
Call: 1-800-617-7384, option 2
709 Gasket
The 709 Gasket is used to prevent the SeeLeveL II Series monitor from shorting when mounting to a metal surface.
Dimensions: 4″ Wide x 2.8″ High
USA STORE
CANADA
Call: 1-800-617-7384, option 2

