The Caleffi CONTECA ULTRA 1 1/2" NPT ultrasonic energy meter, identified by part number Y8NVH5 (Caleffi code 750706.150), is a high-precision heat meter designed for accurate measurement of thermal energy consumption in both heating and cooling applications. Utilizing advanced ultrasonic technology, it provides direct readings and ensures reliable performance with a maximum operating pressure of 16 bar and a temperature range of 5–90 °C. This MID-compliant meter features a long-life (10-year) replaceable 3.6 V lithium battery and offers communication options via M-Bus (wired) or optional LoRaWAN (wireless). Its robust design is rated IP54 for protection against dust and splashing water.