There are 2 products that meet your choice
Utrasonic thermal energy meter with calculator for heating/cooling
Product reference: ESHM - ULTRA - RET - W - WMBUS
Calculation module for a thermal energy meter. This calculation module must be combined with a separate flow meter and separate temperature sensors. These systems can be used for heating, cooling and for combined heating/cooling applications. With MID approval and wireless Mbus communication.
Compact ultrasonic calorimeter for heating
Product reference: EHM-COMPACT-RET-WMBUS-TSENS
Compact ultrasonic calorimeter for heating. Standard delivered with raccords 1/2 "MM.For mounting in return line.Wireless Mbus communication.Supplied with connection piece M10x1 - 1/2 "M for temperature sensor.