tank monitor Image

tank monitor

SeeLevel II Cerbo GX Connection

I reached out to Garnet to understand which kit I would need to utilize the NMEA2k capabilities of the Cerbo GX. They told me to look at this version: 709-N2K NLP and they would sell it to me directly. I want the Cerbo GX/Touch 50 to be able to monitor the tank levels using this system. I want fresh, black, grey and propane monitored. How does this need to be setup so I can use the Cerbo GX/Touch 50 to display the information vs the display that Garnet has that comes with the kit?

duffer41 asked
aswellian commented ·

1 Answer

Looking for input - 4 to 20mA and 0 to 10V senders

Hello Community!

We’re considering to add a USB accessory to our GX product range, to add 0 to 10V, as well 4 to 20mA inputs.

But since all of us have very limited experience with 4 to 20mA tank senders, we're looking for some input:

  1. Is it always 4mA = tank empty, and 20mA is tank is full? Or do the empty and full levels need to be configurable in a software setting on the GX Device?
  2. And how important is it that the transducer can be powered by our device?
  3. Anything else we should keep in mind when designing a 4 to 20mA input? Good features you have seen else where?

Also, if you are using 4 to 20 mA senders, please post a link to a datasheet or specs below. And if you have an opinion on the sender, what you like/don't like, welcome to add that.

Lastly, most questions above are for 4 to 20mA, not for 0 to 10V - but if you have special comments about 0 to 10V, welcome as well - obviously. The product we have in mind will have inputs that can be used for both types.

Note, that this is quite early in the product development, I can’t say anything for now with regards to availability dates.

All the best and thank you! Matthijs

ps. just to prevent any question about this: we'll soon launch a new Venus OS version that can work with irregular tank shapes, as well as naming tanks and some more features: all those features will also available for the 0 to 10V and 4 to 20mA inputs. Details here.

mvader (Victron Energy) asked
danielw commented ·

12 Answers

Tank level sensor for deep water tanks - Venus GX


I'm using a Venus GX and would like to incorporate tank level sensors for our domestic water tanks. The tanks are around 2.5m deep and I would like to be able to use the tank level sensor input of the Venus GX to determine the volume inside the tanks. I've not come across any sensors that can cope with this depth. Does anyone have any options?

Thanks everyone.

casper asked
bodhiray commented ·

4 Answers

RV-C CAN Bus tank monitors

I'm trying to figure out how to take advantage of the tank monitoring capabilities in the CCGX. I know for resistive sending units I need the VE.Can resistive tank sender adapter... My only problem is I have three tanks (Fresh, grey, and black) and these adapters cost $400 each!!! I would end up spending more than twice as much on these "adapters" as I have invested in the CCGX itself.

So I started looking at options. For RV holding tank monitoring: SeeLevel II is pretty much considered the standard for high end monitoring. When i was looking at their product offerings I noticed they have sending units that support "RV-C" which is a CAN Bus based protocol. Since the VE.Can adapter simply converts the resistance it gets from the tank into CAN Bus messages... If the SeeLevel II sends CAN Bus messages to begin with then it *should* be fairly straightforward to just connect these to my existing VE Can bus (I already have a CAN bus between the CCGX and my Orion Lithum BMS system)

That's assuming that the RV-C messages sent by the SeeLevel II are compatible with whatever message format the VE.Can adapter sends. I'm hoping someone from Victron can help me out.

irwinr asked
Kevin Windrem edited ·

6 Answers

Cerbo GX Sensor Recommendations

I'm super excited to find that Cerbo GX can monitor my batteries, solar, AND tanks. My stock KIB sensors are nearly useless, reading 2/3 full until gray water starts coming up my drain, signaling 100% full. It's pathetic.

Does anyone know what sensors I can use that will give accurate level readings and work with Cerbo GX / GX Touch? I would like fresh, gray, black, and propane sensors that work with Cerbo GX.

Will this work? Do I really need 4 sensors for just the black tank?!? https://www.etrailer.com/dept-pg-RV_Sewer-pt-Probe_Sensors.aspx

childcarepro asked
Kevin Windrem edited ·

5 Answers

Getting Tank Output in remote console System View

Hi, I've just installed a tank sender for the diesel tank into my Venus GX and a little disappointed to find that the only page that seems to give the output is the Boat/Motorhome overview page. There is plenty of space on the system page, so think that this info not being output there is a real shame. Let me know if I'm missing something, but I've been through all the settings and doesn't seem possible.

stocksy asked
Kevin Windrem edited ·

2 Answers

How many tanks can the Cerbo GX display?

i have six tanks to monitor. Planning on using the 4 resistive inputs on the water tanks and NMEA2000 for the fuel tanks. Will the Cerbo Touch 50 display them all?

asea asked
Kevin Windrem edited ·

1 Answer

beneteau VDO 5 sensor probe on Cerbo

MIght be a very dumb question but as i understand, the Cerbo only takes resistive tank sensors as inputs. On my boat and many others there is a VDO sensor which comes statard. It consists of five small screws in the tank which then connects to some type of conversion box which then goes to the VDO display panel. The wires to this panel are a positive, Negative and some type of measuring signal wire.

Can this type of measuring device be used in anyway on the Cerbo? I'm clueless with this but maybe someone in the community has a thought or experience.

polarseal asked

0 Answers

Can RV resistance tank sensor be used by the VEnus GX? (recreational Vehicle)

My RV has tank level sensors. 4 pins installed on tank. Each has a resistor connected to it. (except for common)

the bottom 2 pins are at same level. The current system uses 12vdc and it will read 8 vdc when they are both wet. The next pin up is 2/3 level and drop to 6vdc, and 4th pin drops to 4vdc.

So if I remove power and just use the resistances. I should be able to get some reading either NA standard or EU?

the bottom 2 pins have a 0 ohm value when jumped. @ 1/3 level

the next has a 68 ohm valve when jumped to common.

top sensor pin is 188ohm when jumped to common.

I believe this should give 256 ohm when full. and 0 when 1/3 or just slightly off 0 ohm.

I've seen many ppl ask about camper style tank sensors and I think this is what most are referring to. There is no way I can get to my tanks to install float style sensors. And if its any more than building a resistor pack to change the values. I would just stay with the original KIB Tank Monitor system.

It sure would be nice to have it all in the same display.

(Currently have venus/multiplus/bmv-712/mppt 100/50- venus is temporary until cerbo arrives in Canada in August from what I'm told)

cleaver asked
pim answered ·

3 Answers

Venus GX Tank level feature request


Can the Venus GX tank level inputs be changed to accept over 100,000 litres? I need to have 150,000 litres.... Also it is extremely slow to increase the value the way it is. Can this be changed as well so the value can be changed quickly?


miles asked

0 Answers

Tank senora to Venus GX

I'm trying to get the water tank level sensors connected to the Venus GX. But how.... I can't really get any information out.

I have activated the analog tank sensor on the Venus GX.

The level sensor has two connectors and ground. See picture.


sebastian-w asked
sebastian-w edited ·

1 Answer

VE.CAN Resistive Tank Sender

Good day. I have a CCGX with a VE.Direct MPPT, VE.CAN Freedom battery, VE.BUS Multi and a VE.BUS Digital Control. I want to monitor a tank as well. Will the VE.CAN Resistive Tank Sender Adaptor be able to communicate via VE.CAN as well. The battery bank is using the VE.CAN port

etienne asked
luis-gomezcala commented ·

2 Answers

Pinout of resistive tank inputs of a Cerbo GX

Does anyone know, if some of the Pins of the four resistive tank inputs are connected to GND or 5V?

I‘m asking if I have to wire all eight pins for four sensors or if it‘s enought to wire one GND and four signal pins from the sensors...



bricki asked
Kevin Windrem answered ·

1 Answer

Tank level sensor update interval is too slow on Venux GX

I have a resistive tank level sensor (similar in design to this one) installed in a header tank, and connected to a Venus GX. It works fine so long as the tank level is relatively static - however, if the tank level is rapidly rising or lowering, the Venus can't seem to keep up.

So for example, if I turn on the pump to fill the header tank, it is overflowing by the time the Venus is even reading 80%. Once I turn the pump off, the Venus reading continues to tick upwards gradually until finally reaching 100%, but this seems to take a few minutes to catch up.

Because I want to use this reading to control the pump, it is obviously an issue. I'm fairly sure it's not the sensor, since connecting a multimeter and actuating the slide manually seems to produce instantaneous change in the resistance reading. Is there a way to get the Venus to update the reading more rapidly?

aeneby asked
danhig answered ·

4 Answers

Cerbo GX VRM : temperature and tank level

I have temperature sensor and connected the tank sensor to the Cerbo GX.

The Cerbo GX device has reconised these input however it does not show up in my VRM view.

What am I missing here ?

Control panel ::


My VRM view


henrikvj asked
vincefarrar commented ·

1 Answer

Cerbo GX and tank level

My CerboGX show the tank level as %

Right now 18% of 200 liters = 36 literes.

How can I get it to show Liters and not %


henrikvj asked
Paul B answered ·

1 Answer

How can I hide the 'Tank' column in VRM overview, and select which tank is shown?

On the VRM 'My Installations' overview page, there is a column called 'Tank' which makes no sense to me.


This installation ('Caravan') has 3 tanks and in this case the value listed happens to be for Tank 3. For another system ('Test system'), I only have one tank input enabled and it lists that tank (logical).

My question is why VRM picks one of tanks (seemingly at random) without any input on the user's part? Is there some hidden algorithm to choose which one to display? Regardless, it's vague and confusing - and in my use case, that column is of no value.

A way to hide it - or better still, choose what it means would be a nice improvement.



dunnp asked
dunnp answered ·

4 Answers

tank sensor display on touch 50

I installed a couple of the KUS liquid sensors. 240 - 30 ohm. At 240 ohm, it shows empty, at 145 ohms still shows empty, at 140 it shows 45% full and works great from there too full. I can see the resistance going down as liquid is added to the tank but the touch 50 shows zero until 45%. Based on the crappy RV sensors, I show 1/3 full at the same time. When the touch 50 shows 65 - 70 %, the stock RV sensor goes to 2/3. If I adjust the empty resistance to 250 ohm, the touch 50 screen shows 7% but it sits there until 45%. Does this on 2 different sensors. Any ideas?

lspangler asked
cleaver answered ·

4 Answers

Use existing gauges in paralel with Cerbo tank level input?

I have 4 different tanks in my boat. Diesel tank x2, fresh water tank, and waste water tank. Each of the tanks has one tank level senders connected to analog gauges. I want to be able to read the values from my Cerbo GX, but i still want to able to use the existing gauges. it possible to show the tank level on the Cerbo GX and at the same time on the existing tank gauges?

Jimmy Bergetun asked
asea answered ·

2 Answers

Cerbo GX shows: tanks > No tanks found

Tank entries were shown on the detail databoxes page on my Cerbo GX.

Then suddenly " No Tanks Found" was shown and I have no way to bring them back on display, does not show the configuration in devices either. The tank sensors are switched on in the Analogue I/O menu.

What am I missing ? I tried going back to frimware 2.56 and then back to 2.60 but this looks like a hardware fault, any ideas ?

pyemarine asked
pyemarine answered ·

3 Answers

How do I add tank monitors to my Victron Color Controller?

I hav the Victron Color controller monitoring my Multiplus, BMV and Blue Solar controller in my RV. I would like to add tank monitoring through the color controller. Do I need to purchase a whole new tank monitor system, or is there a way to use the existing resistant based monitor wires? Is there any documentation or resources for adding tank monitors to the Victron Color Controller?

Steve Mullins asked
charles-riley commented ·

3 Answers

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.

simonsays asked

0 Answers

Cerbo GX Adhesive Tank Sensors (capacitive?)

When hooking directly to Cerbo GX can you use RV/Motorhouse tank sensors that are the Adhesive external sensors? If my understanding is correct those are capacitive sensors since there is 4 levels of them each tank?

burnttech asked
Kevin Windrem commented ·

1 Answer

Cerbo Gx or CCGX Auto Gen Start for Onan QG 4000

I have ordered a 2021 Winnebago Minnie Winnie 26T and it comes with the Onan QG 4000. It does have a remote switch in the coach to turn on the generator.

I would like a wiring diagram to both the CCGX and to the new Cerbo GX. I am looking at the Cerbo/ Touch GX combination as an alternative to the CCGX. Ultimately I will go the direction of which one serves my purposes better and works easier with the Onan Auto Gen Start.

I will be using all Victron components:

150/100 MPPT VE. Can Solar Charger

10x95 Zamp Solar Panels

4x200ah Smart Lithium Batteries

Victron Battery Monitor

Either the 12/3000 Multi-plus Inverter charger or the 12/5000 Quatro

I am also looking at adding the SeaLevel II tank monitoring system. (if I go the Cerbo GX route I would like to use in in connection to this system using the NMEA2k connection)

This would all be connected to either the CCGX or the Cerbo/Touch GX.

Please advise on the wiring diagram for both and what parts are necessary to make this work. I will want to have the generator start and stop based on the state of charge parameters I set as well as time blocks during quite hours.

Thank you for anyone who can help me sort this all out.

duffer41 asked
jwfrary answered ·

2 Answers

CCGX VE can to nmea2000 tank sensor's

I have hooked 3 maretron tlm100-01 tank level sensors to a Nmea2000 backbone and connected that to a ve can adapter going to my ccgx

But the tank level sensors do not show up on the ccgx display

The manual say that these are compatible

Have I somehow installed of these wrong?

Or is there some sort of program I need to download to make them communicate?

adam-michaud asked
jurjenhoekstra answered ·

1 Answer

Tank adapter to LPG?

I would like to use the CCGX to monitor my LPG tank, which has a 0 to 90 ohm range from the sender. Is there a way to connect it to the tank sender adapter so that it will correctly display the tank level?

kevin-lynchehaun asked
david-ktn answered ·

4 Answers

Ve Net and VE Can Tanks Sensors

Hi Im looking at getting the Cerbo GX and one of the functions is the tank sensing for water and diesel tanks , see two items Ve Net VRS000100010 and Ve Can BPP900600100 i can find a use man for the Ve Net but not the Ve CAn what do people use and what tank sensors have people found success with ?

stavarda asked
mvader (Victron Energy) commented ·

1 Answer

Venus GX tank sensor custom name

Hi there, I have two tank sensors connected to the Venus GX (most recent FW version 2.32). I am programming some logic with Node-Red. The Tank Sensor node tells me: "Multiple tank sensors were found with the same name. You can set a custom name for the device in Venus settings."

I looked through all the venus settings pages via Console on LAN - but nowhere found an option to change the device names of "Generic Tank Input (1)" or "... (2)".

Somebody has an advice?

Thx. in advance,

Thomas Pfeifer asked
enya commented ·

1 Answer

Disable tank or temperature sensors in menu of Venus GX

Bought a Venus. Cool stuff. Lots of IO. I have yet no tank sensors. Later I will have two only. Is there a way to disable some of the tanks or temperatures to let them being hidden in the main menu?

Ralf Klüber asked
Ralf Klüber answered ·

1 Answer

VE. Can Resistive Tank Sender Adapter


Is it possible to use the VE. Can Resistive Tank Sender Adapter in a system using a BYD battery if there is a Venus GX in the system?

Also has the second relay on the Venus been made available for use yet?


stevo07 asked
wkirby edited ·

1 Answer


53 Posts
108 Users

Topic Experts

There are currently no experts identified for this topic. Can you answer questions in this topic area? Community members who provide answers that are marked as correct earn reputation and may become recognized as topic experts.