Recommendation wanted for energy monitoring sensors ( water, gas, electricity)

[Gast]

Hello,

I would like to implement energy monitoring with my loxone installation. For this I'm asking you guys if you already installed a certain sensor/meter and could recommend one.

for gas: I'm from Belgium, apparently we have a different kind of gas mixture than NL and DE.
for water: I would like to have 2 meters ( 1 for drinkwater and 1 for rainwater)
for electricity: I have a 3 x 220V connection coming in the house ( This is an old variant of the now standard 3x400V)

so again witch meters/sensors did you use to monitor your energy usage and if you remember the cost of the meter/sensor that would be great

thanks in advance.

mosseltje