Compact residential heat meter, type HYDROCAL M4, DN15 (1/2"), Qp=0.6 m³/h, Tmax: 90°C, L=110mm, installation on return line, with radio module H4-1122-4321-2010

Compact heat meter with integrated wireless module

The device measures thermal energy consumption in central heating systems and performs exceptionally well in apartments up to 100 m², and in new buildings compliant with WT2021 standards – even up to 150 m². It is installed on the return line, simplifying installation in confined spaces such as near walls or in heating cabinets.

The nominal flow rate Qp = 0.6 m³/h matches typical loads of individual units – it neither overstates nor underestimates consumption, delivering precise measurements even at low flow rates. The external thread DN15 (1/2") allows direct connection to pipes without requiring additional adapters or reducers.

The integrated Wireless M-BUS module enables remote data reading without entering the apartment. This not only provides convenience for property managers but also reduces operational costs and accelerates billing. The module is compatible with the Hydrolink system and operates on a battery with a service life of 10 years, eliminating the need for power source replacement during the device’s lifetime.

Temperature and flow sensors are part of the brass measurement module, installed directly in the flow line. No additional sensor mounting is required – everything is fully integrated. The maximum medium temperature is 90°C – sufficient for standard heating systems.

The installation length of 110 mm ensures the device fits even in the most compact locations. It can be mounted both vertically and horizontally – real installation flexibility, not just theoretical.

The delivery includes: electronic module, brass measurement block with sensors, a 1.5 m long pipe temperature sensor, and the manufacturer’s instruction manual. The device is legally certified for 5 years and covered by a 2-year warranty.

No couplings or tees required – this is a pure heat meter, ready for direct installation into the pipeline.