For many years Sontex SA has dedicated its know-how to innovative communication systems. The well-known and in many applications established Sontex 433 MHz radio system is now complemented by the wM-Bus and OMS 868 MHz radio system. Sontex SA offers a range of devices – heat meter, heat cost allocators and additional radio module – that work with the unidirectional wM-Bus system. If requested, an AES128 encryption key to protect your data can be inserted into the devices from both radio systems at the factory. With the Supercom 637 and Supercom 647 reading systems as well as dedicated software it is now possible to make a simple, fast and efficient reading at any time.