The DUS-E5 energy meter from Prisma Instruments has been specially designed to meet the recurrent needs for non-intrusive metering of thermal and refrigeration energy in HVAC and building management systems. Equipped with precision PT1000 clamp-on probes operating on pipes ranging from DN15 to DN80, it can be installed in seconds by screwing it around the pipe, without the need to stop the flow or drain the circuit. Due to its ultra-compact size, the DUS-E5 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, thanks to a Modbus RTU output and can be easily connected to a BMS. Its very pure design, its numerous functions and its excellent quality/performance ratio justify its success with professionals in the sector.