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SeeLeveL Sensor for RV Holding Tank Monitor - 6" Long

SeeLeveL Sensor for RV Holding Tank Monitor - 6" Long

Item # SE77VR
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This SeeLeveL tank monitoring sensor is designed for use on tanks that are short and wide, and it provides the most accurate readings for tanks less than 7" tall. Sends readings to a SeeLeveL monitor (sold separately). 1-636-306-4830 to order SeeLeveL accessories and parts part number SE77VR or order online at Free expert support on all SeeLeveL products. Guaranteed Lowest Price and Fastest Shipping for SeeLeveL Sensor for RV Holding Tank Monitor - 6" Long. Accessories and Parts reviews from real customers.
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SeeLeveL Accessories and Parts - SE77VR

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This SeeLeveL tank monitoring sensor is designed for use on tanks that are short and wide, and it provides the most accurate readings for tanks less than 7" tall. Sends readings to a SeeLeveL monitor (sold separately).


  • Sensor measures how much fluid is in your RV's holding tank
    • Hardwires to SeeLeveL holding tank monitor (sold separately)
  • Mounts to the outside of the tank rather than using an interior probe
    • Prevents false readings caused by accumulating debris
  • Provides readings with single-digit accuracy
  • Coated with flexible epoxy layer for added durability
  • Installs easily - clean tank surface, remove backing, and stick to side of holding tank
    • Tabs on top of sensor are trimmed to indicate which tank it is on
    • Length can be trimmed every 1" 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: 4-1/2" - 7" tall tanks
  • Length: 6"
  • Resolution: 1/4"

Note: Unlike other SeeLeveL sensors, the 6" sensor cannot be stacked to accommodate taller tanks. If your tank is taller than 7", step up to the 12" sensor (SE87VR) or 16" sensor (SE27VR).

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.

Easy Install

If you're comfortable with basic wiring, installing the SeeLeveL monitoring system should be a straightforward DIY project.

A single 6" sensor can measure a tank as tall as 7". For a shorter tank, the sensor can be trimmed. Unlike the 12" and 16" SeeLeveL sensors, the 6" sensor cannot be stacked for taller tanks. If your tank is taller than 7", use a taller sensor.

Sensor Options
Tank Height Best Resolution Other Acceptable
4-1/2" - 5" (1) 6" -
5" - 7" (1) 6" (1) 12"
7" - 13" (1) 12" (1) 16"
13" - 17" (2) 12" (1) 16"
17" - 25" (2) 12" (2) 16"
25" - 34" (2) 16" -
Part numbers: 6" (SE77VR), 12" (SE87VR), 16" (SE27VR)

To get the best resolution for the highest accuracy, choose the right setup. The segments along the left side of the sensor have 4 read points each. The more of those segments you have, the better the accuracy. Even with the lowest resolution possible, you will get tank readings accurate within 8%.

After some surface preparation, the sensors are attached to the tanks with 3M adhesive backing. Splice together all signal wires and all ground wires from the sensors, and run those two wires through your RV to the monitor inside. If you're replacing an old tank monitoring system, the existing wiring can be used.

710-JS Garnet Instruments SeeLeveL RV 6" Sender


Ask the Experts about this SeeLeveL Accessories and Parts

  • Replacing Older Winnebago RV Tank Monitor Display with SeeLeveL RV Holding Tank Monitor
    Yes, the SeeLeveL RV Holding Tank Monitor for fresh, gray, black - water pump and heater switch, # SE74VR is designed specifically to be a replacement for older tank monitoring systems. The SeeLeveL # SE74VR uses sensors that are sold separately for single-digit accuracy. The SeeLeveL sensors are mounted on the outside of the tanks, this means they are easy to install, won’t give false readings due to debris, and are easy to maintain. The SeeLeveL tank monitoring system uses technology...
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Info for this part was:

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Edited by:
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