Manufacturing-commercial company «BETAR» together with the Scientific and Production Association «KARAT» are launching the production of the domestic ultrasonic heat meters «KARAT-Compact 2-223 BETAR», which are intended for commercial accounting of heat energy consumption in closed water heating systems in the field of household consumption. The meters are available in several versions: • with a nominal diameter of 15 mm or 20 mm, • for installation into the supply or return pipeline, • with wired (M-Bus, RS-485, pulse input/output) and wireless (LoRaWANTM) interfaces. Structurally, the meters are available in the form of a monoblock.