The CE3 ultrasonic flowmeter from Prisma Instruments has been specially designed to meet the recurrent needs for non-intrusive water volume or flow measurements. It accurately measures the consumption of cold or hot water in a closed circuit. As an option, it can also be used as an energy meter by equipping it with non-intrusive PT1000 probes. It works on pipes from DN15 to DN80 and can be installed in a few seconds by screwing it around the pipe, without the need to stop the flow or drain the circuit. Due to its compact size, the CE3 meter can be easily installed in a small space, or on several pipes when they are very close to each other. Moreover, it also has rich network functions, such as Modbus RTU, Wi-Fi, and Bluetooth and can be easily connected to a BMS. It can also perform iCloud storage and analysis management functions. Its sleek design and its many features including data collection allow it to meet different working conditions.