In recent years there have been more or less precise solutions to count for the heat produced by radiators, this to distribute more evenly the cost of heating in condominiums with central heating, putting it in relation (at least in part and at least approximately) to actual consumption. And this is fair.
What is not fair is very often the expense you have to "read" those marvels of digital counters, which in many cases reach even 5 euros per thermosiphon... just like they were read apartment by apartment by a kind little man, writing them in pen on a notebook (well a very slow man ... 4 radiators are already 20 euros and to write 4 numbers on a piece of paper certainly doesn't take an entire hour, and we doubt that it is normal to pay a reader of meters more than 20 euros the hour, so ... we can safely call this expense... theft!).
These systems are digital and are often connected (or can be connected) in radiofrequency with a "control unit" or "concentrator" or "antenna" or "box" usually positioned in the stairs or in other common areas.
You will certainly be wondering why, by now by 2019, it is not possible:
a) connect this unit to the Web so that, for example, the administrator can read directly from his/her office (continuous web reading) without spending money to have everything read from third parties
b) "read" the data of the concentrator / antenna / control unit on site for example via WiFi, without the need to rent a technician with expensive dedicated equipment, so that the administrator (or a scale advisor or other condominium in charge) can read for himself data with a laptop or with common smartphone / mobile phone either with Android or iPhone (reading on site with WiFi)
Well, we have both solutions.
Both are very easy to install
and they connect with a nice wire to the m-bus interface
connector) of your concentrator (the current standard in the heat counts), that is usually this stuff here: