After a year of full‑time travel and real‑world use, I wanted to share our hands‑on experience with the Garnet Instruments SeeLeveL RV tank monitoring system. This is not a first‑impression or bench review — this is based on everyday RV living, regular dumping cycles, boondocking, and travel across multiple regions.
Why We Upgraded Our RV Tank Gauges
This upgrade actually started with a freshwater tank replacement.
During that project, we had full access to our tank compartments — something that doesn’t happen often in an RV. With everything already opened up, it made sense to finally address another long‑standing frustration: unreliable factory tank gauges.
Like many RVers, our coach originally relied on a traditional probe‑style monitoring system. You know the kind:
- Reads in vague thirds (Empty / 1⁄3 / 2⁄3 / Full)
- Frequently shows “Full” when the tank clearly isn’t
- Becomes unreliable as soon as residue builds up inside the tank
Since the tanks were already being worked on, this was the perfect opportunity to install a system we’d been considering for a long time — Garnet Instruments’ SeeLeveL system.
The SeeLeveL System We Installed
We chose the Garnet SeeLeveL 709‑BTP7, which is their Bluetooth‑enabled, multi‑tank RV system.
Our installation includes:
- SeeLeveL 709‑BTP7 display module
- Bluetooth connectivity to the SeeLeveL mobile app
- External sender strips mounted on each tank
This setup allows us to monitor:
- Fresh water tank
- Grey water tank
- Black water tank
- Propane (onboard) tank
- Additional tanks as needed (up to 7 total)
- Battery voltage
The Bluetooth feature means we can see all of this information directly on our phone or tablet, which fits perfectly with how we travel and live in the RV.
How the SeeLeveL System Works (And Why It’s Different)
The biggest difference with the SeeLeveL system is how it senses tank levels.
Instead of probes inside the tank, SeeLeveL uses external vertical sender strips mounted to the outside of the tank wall. These senders read the fluid level through the tank material and provide a true digital measurement.
Key advantages:
- No sensors inside the tank to foul or corrode
- No false readings caused by waste buildup
- Continuous percentage‑based readings instead of “guesswork”
- Sender strips can be trimmed or stacked to match tank height
In practice, this means the readings stay accurate — even after a year of use.
Accuracy After One Full Year of Use
This is where the SeeLeveL system really shines.
After a year of dumping cycles and refills, the readings:
- Match actual tank levels extremely closely
- Change smoothly as tanks fill or empty
- Have not drifted or required recalibration
When the system says a tank is 72% full, it genuinely is. That level of precision is incredibly helpful when boondocking or planning dump stops.
This is the first RV tank monitoring system we’ve owned that we actually trust.
Bluetooth App Experience
The Bluetooth version has been a great addition.
From the app we can:
- View all tank levels in real‑time
- See exact percentages instead of bars or lights
- Check battery voltage at a glance
- Read tanks without being inside the RV
The Bluetooth connection has been stable, and the app has worked consistently across devices. It enables you to track fills and dumps on your phone as it happens.
Installation Notes
Installation was straightforward for anyone comfortable with basic RV wiring and access to tank compartments.
General steps included:
- Measuring tank heights
- Trimming and mounting sender strips
- Running wiring to the display module
- Pairing the Bluetooth unit
No drilling into tanks was required — which alone makes this system appealing.
We were able to reuse the original tank sensor wiring – a real bonus
Photos & Real‑World Readings
The photos show the monitor installed, the solid state construction of the rear view and the filling of our fresh water tank on phone & tablet. The app allows each tank to be named, you can chose the colour of the level, the three large terminals on the back view were for the pump switch.
These images clearly show how precise and readable the system is in daily use.
Overall Value & Final Thoughts (Rolling Down The Road Verdict)
After a year of use, I can confidently say:
- The SeeLeveL system is worth every dollar
- Accuracy has remained consistent over time
- Bluetooth adds real‑world convenience
- External sensors eliminate the biggest weaknesses of traditional RV gauges
If you’re tired of guessing your tank levels or dealing with unreliable factory gauges, this is an upgrade that actually delivers on its promises.
Would We Install It Again?
Absolutely — without hesitation.
The Garnet SeeLeveL RV system has become one of those upgrades you stop thinking about because it just works. And in the RV world, that’s about the highest praise you can give.
If you’re considering upgrading your RV tank monitoring system and want accurate, dependable readings, the SeeLeveL system deserves a serious look.
Day 3030
The Buchanan's Rolling Down The Road 