Is this possible with the accessory kit or does it work only for metal contact (battery etc)? And what about Gerbo temp probe? Or do you need a Ruuvi tag etc?
asked
Measure air and water temperature with BMV-712
It clamps on the battery terminal. Temp reported is thus both when in equilibrium, and if there's a difference, it will tend towards air temp due to the slower change in temp of the batteries compared to air.
I meant that if you don't connect it to battery but leave hanging in air or drop in water?
No you can not do this as the BMV temperature sensor also works as the positive power supply and voltage sense cable. If you leave it hanging in the air the BMV will shut down
The just run a wire from the temperature probe back to the battery (+) terminal. Problem solved. Air Temperature probe functional.
Okay so followup question, how can you monitor air or water temp? Anyone built a system for that?
You can use the Victron temperature probe the connects to Cerbo although I'm not sure if it is waterproof enough to submerge.
Those temperature sensors are LM355. I've made these relatively waterproof with a length of heat shrink tubing crimped at the end while still hot.
