HOLDING TANKS SOLUTION
The tank monitor that works!
Effortless Purchases Now Available
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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!

The SeeLeveL Soul (708-RVC H) is a data module that gathers tank level information from SeeLeveL senders and transmits it to a multiplex system via an RV-C bus. It's compatible with RV-C Interface Multiplex and can be configured through the SeeLeveL Soul Interface. Currently, it's exclusively available for OEMs.
NEW

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

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.

  USA STORE
  CANADA STORE 

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

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.

  USA STORE
  CANADA STORE

709-P3 Features

Monitors: Fresh, Grey, Black, Battery voltage

LPG:  no

Switches:  3-way pump switch/single-pole

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.

  USA STORE
  CANADA STORE

709-P3W Features

Monitors: Fresh, Grey, Black, Battery voltage

LPG:  Connects to an existing LPG sensor

Switches:  3-way pump switch/single-pole

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.

  USA STORE
  CANADA STORE

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

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.

  USA STORE
  CANADA STORE

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

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.

  USA STORE
  CANADA STORE

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

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.

  USA STORE
  CANADA STORE

709-RVC NLP Features

Monitors: Fresh, Grey, Black, Battery voltage

LPG:  no

Switches: none

Other: RV-C Interface compatible

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.

  USA STORE
  CANADA STORE

709-RVC PM Features

Monitors: Fresh, Grey, Black, Battery voltage

LPG:  no

Switches: 3-way pump switch/single-pole

Other: RV-C Interface compatible

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.

  USA STORE
  CANADA STORE

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. 

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.

  USA STORE
  CANADA STORE

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

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.

  USA STORE
  CANADA STORE

709-4P Features

Monitors: Fresh, Grey, Black, Galley, Battery voltage

LPG:  no

Switches:  Pump switch/single-pole

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.

  USA STORE
  CANADA STORE

INDIVIDUAL SENDERS AND ACCESSORIES

STANDARD

710-AR Sender

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)

Designed with higher resolution, this sender is tailored for holding tanks with shorter heights. Its advanced sensor technology ensures precise fluid level monitoring, making it the optimal choice for low-profile tanks where accuracy is critical.

  USA STORE
  CANADA STORE
OPTION 1

710-ES2 Sender

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)

Designed for effectiveness across a broad spectrum of tank heights, this sender is both versatile and dependable. Compatible with most holding tanks, it offers reliable measurements for a diverse range of tank height applications.

  USA STORE
  CANADA STORE
OPTION 2

710-SS Sender

Fits tank heights:  7″ – 18″ (single) up to 34″ (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)

Designed specifically for taller tanks, this sender ensures precise fluid level monitoring. Its specialized design ensures optimal performance, providing reliable measurements to meet the demands of tall tank applications.

  USA STORE
  CANADA STORE

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 STORE

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 STORE
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