question

Matthew Shea avatar image
Matthew Shea asked

source for GX Tank 140 compatible sensors in USA

I am looking for a compatible tank sensor similar to this one.

https://www.safiery.com/IP67-tank-level-sensor-external-pressure

I am in the united states and would prefer to not have to order something from Australia. I found this on Amazon which looks like it should work but they offer it in several different PSI levels and not sure which one makes the most sense to try or if it is even compatible. any help here would be appreciated

https://www.amazon.com/Pressure-Transducer-0-5-4-5V-Transmitter-0-100PSI/dp/B07KJFPMGZ/?_encoding=UTF8&pd_rd_w=VlkiC&content-id=amzn1.sym.e4bd6ac6-9035-4a04-92a6-fc4ad60e09ad&pf_rd_p=e4bd6ac6-9035-4a04-92a6-fc4ad60e09ad&pf_rd_r=DNZ2QQX3HS4V2NZWXK3M&pd_rd_wg=iDX1S&pd_rd_r=2b6711f7-fd9b-4382-b8c6-79d53bfc8f1a&ref_=pd_gw_ci_mcx_mr_hp_atf_m


tank monitor
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
kamflyer avatar image
kamflyer answered ·

What size and shape of tank? In a typical flat tank like what would be found in an RV you may only see 1/2 PSI or less (P=0.43h where h is the height of the water column in feet) If a metal or odd shaped tank, you might be better off using a float type sensor if possible.

One method I have used quite succcessfully with a GX Tank 140 is a capacitive sensor based on foil strips adhered to the outside of the tank. Take a look at Tank Edge MODA sensors (https://tankedge.com/accessories.html). Of course this only works on plastic tanks.

3 comments
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Matthew Shea avatar image Matthew Shea commented ·
I have a class A RV. the tanks are a bit awkward to get to which is why I am trying to avoid the side mount sensors. I figure with a sensor like this, I should be able to tap a hole on the dump line as close as possible to the tank itself and that should get me an accurate enough reading. so in most cases and mine, a 10 PSI sensor would be more than enough as that would allow for a 20+ foot water column.
0 Likes 0 ·
pyemarine avatar image pyemarine commented ·
Hi I have the tankedge sensors on my tanks as well. How did you interface the MODA with the Tank 140 (wiring) ? Does it need the 10v regulator after your 24-12 conversion ? Does this work in parrallel with a tank edge iseries display ? thanks much !
0 Likes 0 ·
kamflyer avatar image kamflyer pyemarine commented ·

I am running the sensors at 12V. TankEdge indicates this is fine. To get 12V I added a small buck converter into the power leads of the sensor. https://www.amazon.ca/gp/product/B087RHL744/

The output of the sensor just feeds the input of the GXTank 140. Even though my tank is a basic rectangular tank I found it wasn't perfectly linear so used the custom tank option and set up 10 steps between full and empty. It still isn't perfect but is well within a 2 to 5% error margin. Orders of magnitude better than the factory 4 light gauge.

A bit more info and a picture near the bottom of this thread. https://community.victronenergy.com/questions/54949/cerbo-gx-sensor-recommendations.html


0 Likes 0 ·