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SeeLeveL RV Holding Tank Monitoring System - Fresh, Gray, Black - Multiplex Compatible

SeeLeveL RV Holding Tank Monitoring System - Fresh, Gray, Black - Multiplex Compatible

Item # SE99VR
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Our Price: $558.80
Smart RV
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Shipping Weight: 5 lbs
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If your RV tank monitor readings change from 25% to empty in the blink of an eye, that's a problem. SeeLeveL sensors track 3 holding tanks with single-digit accuracy at the monitor. Can send readings to a primary control panel in multiplex RVs. Lowest Prices for the best smart rv from SeeLeveL. SeeLeveL RV Holding Tank Monitoring System - Fresh, Gray, Black - Multiplex Compatible part number SE99VR can be ordered online at or call 1-800-496-5010 for expert service.
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SeeLeveL Smart RV - SE99VR

  • Monitoring System
  • Water Pumps
  • SeeLeveL
  • Digital Display

If your RV tank monitor readings change from 25% to empty in the blink of an eye, that's a problem. SeeLeveL sensors track 3 holding tanks with single-digit accuracy at the monitor. Can send readings to a primary control panel in multiplex RVs.


  • Monitoring system tracks and displays the levels of your RV's holding tanks at the push of a button
    • Hardwires to SeeLeveL sensors - includes (3) 12" sensors for fresh, gray, and black tanks
  • Sensors mount to the outside of the holding tanks rather than using interior probes
    • Prevents false readings caused by accumulating debris
    • Provides readings with single-digit accuracy
    • Can be trimmed or stacked with an additional sensor to match your tank size
  • Display monitor also shows your battery voltage
    • Diagnostic mode checks status and signal strength of sensors
    • Error codes alert you of any issues - check the manual for suggested solutions
  • Compatible with RV-C multiplex systems to display tank levels on your center console
  • Multiple monitors can be used so you can check tank status from the service bay and inside your RV
  • Easy installation - cut hole for recessed mount monitor, attach sensors on tanks, and hardwire together
    • Includes pigtail needed for installation
    • Tabs on top of sensor are trimmed to indicate which tank it is on
    • Length can be trimmed every 1-1/2" to match the height of your tank
    • Bus wiring lets all sensors splice together to one line
    • Existing wiring from your old tank monitor system can be used to ease install


  • Application: 3 tank systems for RVs and motorhomes
    • 1 sensor can accommodate 5" - 13" tall tanks
    • Stack additional sensor to accommodate tanks up to 25" tall
  • Monitor dimensions: 4" wide x 2-13/16" tall x 1-1/4" deep
  • Operating temperature range: 32 F - 140 F
  • Operating voltage range: 11V - 16V
  • Sensor quantity: 3
  • Sensor length: 12"
  • 1-Year limited warranty

Advanced RV Tank Monitoring

Traditional tank monitors have a reputation for being unreliable. Only a few sensors are installed inside, meaning that they usually only measure in quarter increments and can send false readings if they get dirty. When you're keeping an eye on how much fresh water you have, the difference between 25% full and empty means a lot, and that inaccuracy can be a problem.

The SeeLeveL tank monitoring system uses technology that can sense fluid levels from the outside of the tank. The sensors' flexible circuit board sticks in place and measures along its entire height. This makes it accurate in single-digit increments.

Multiplex Compatible

This monitor is compatible with RV-C, multiplex wiring systems in RVs. This method of wiring allows multiple components in an RV to be operated by splicing them all into a single wire. This single wire usually connects to a central control panel, letting you control everything from lights, slides, and temperature from one place. This also simplifies the wiring process in RVs, since every component doesn't need to be individually wired to its own control panel.

With multiplex compatibility, this monitor can send accurate tank readings to a primary control panel. It will still work in RVs without multiplex wiring - just wire it normally. But if your RV doesn't have multiplex wiring, and you have no plans to get a multiplex system, then you can save your money and choose another SeeLeveL monitor without this capability.

709-RVC_NLP SeeLeveL RV Holding Tank Monitor for 3 Tank Systems - Multiplex Compatible - Battery

710-ES2 SeeLeveL Sender for RV Holding Tank Monitor Display - 12" Long - 7 Tanks

Installation Details SE99VR Installation instructions


See what our Experts say about this SeeLeveL Smart RV

  • Recommended Replacement Holding Tank Sensors For A 1998 Goergie Boy Cruise Master Motorhome
    We carry the SeeLevel Tank Sensors which stick to the sides of your tanks and can reuse the wiring for your current tank sensors for an easy installation. The monitor display would need to be swapped out but from replacing these a few times myself I can confirm that it really isn't difficult. There are a bunch of options available when it comes to the monitors depending on what you'd like it to monitor (multiple black or grey tanks, propane, water pump switch, etc.) so if you're just...
    view full answer...

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Info for this part was:

Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Edited by:
Amanda M
Employee Jonathan Y
Video by:
Jonathan Y
Employee Kevin C
Test Fit:
Kevin C
Employee Cody B
Written by:
Cody B

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