question

wissel avatar image

Cerbo GX with GasIt and Votronic Tank Senders?

Hey. Does anyone know if the Cerbo GX is compatible with the following tank sensors?
Votronic 12-24 K (waste water), Votronic 30-110 K-FL (fresh water), GasIt tank sender (LPG)
The Votronic sensors are capacitive (like most motorhome water sensors)
Thanks.

cerbo gx
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2 Answers
borki avatar image
borki answered ·

Hi

Does anyone have the Cerbo GX with the Votronic tank transmitters

tested, because I'm also looking for a cheap solution.

greetings

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Kevin Windrem avatar image
Kevin Windrem answered ·

Like the Venus GX, Cerbo GX tank inputs are designed to work with resistive senders in the range of approximately 0 to 200 ohms. Internally, the inputs are pulled to +5 volts with a 680 ohm resistor.

The Votronic sensors appear to output a voltage that's proportional to the fluid level and it's maximum level of 2.2 volts may be higher than the GX tank input can accept. Also, 680 ohms is a fairly stiff pull-up so the voltage output of the sender may be pulled out of the normal range depending on it's design.

So the answer is maybe.

The GX tank inputs are currently configurable to two ranges to support European and US senders. While the GasIt LPG sender appears to be resistive, the resistance varies between 0 and 95 ohms which doesn't match either the US or European resistance ranges. Venus OS 2.60 currently in beta test has adjustments to accommodate other ranges. I don't know what the range of adjustment is however. Current documentation does not specify adjustment range. So again ... maybe.

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