question

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SeeLevel I (not II) to CerboGX

Our Motorhome has a SeeLevel I, not the newer SeeLevel II, tank monitoring system.

It's hard to find good info, but it would seem the sensor sends a value between 0 and 5V, with linear progression, to show the level. 0V is empty, 5V is full, 2.15V is 43%

I got this info from this manual:

Garnet SeeLevel I Tank Monitor Accessory

That document also mentions the sensors have 1,000 Ohm internal resistance.

I believe we have the Model 707 SeeLevel I (Documentation HERE)


It would seem this system uses the 12V it gets from the RV to power the display, and read the 0-5V values from each of the tanks. Is there a way to read out those values via a CerboGX or similar?


It is my understanding that the newer SeeLevel II system, that DOES have an N2K variant, can work with GX, but I think that would also require new tank sensors to be installed (which I want to avoid).

With lots of older high-end motorhomes being bought by younger couples, I hope someone can find a way to convert SeeLevel I to interact with a CerboGX or VenusGX.

Venus GX - VGXcerbo gxtank monitor
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1 Answer
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jesseafuchs answered ·

Hey, I have thought about this. I think the new GX tank 140 could be used, 5 volts would need to be sourced from a separate power supply, but the signal could go to the 140 i reckon

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or perhaps the signal could just be jumpered to the tank 140? and the Seelevel device and the cerbo could be used to display levels