Combined heat and cold meter

With the sensonic II, we offer our own hybrid meter for the combined recording of heat and cold. The devices, which have been approved under calibration law for both consumption values, have two counting registers where the respective energy data are stored separately.

The meters, available as compact and combined versions, are therefore suitable for flexible use in residential and commercial properties where individual user units are heated and cooled by means of one water circuit. So the installation of additional cold and heat meters can be dispensed with, thus substantially reducing the equipment and installation costs.

Performance features of the sensonic II

Different designs

The different designs cover a wide range of requirements. For example, the compact version with rated flows of 0.6 / 1.5 and 2.5 m³/h have been specially developed for use in residential buildings. As electronic multi-jet impeller meters, they retain high metering accuracy throughout their entire life cycle. The combined meters, where the calculator, flow sensor and temperature sensor are installed separately, are suitable for rated flows of up to 250 m³/h and higher, especially for the commercial sector.

Changing between hot and cold metering

The difference between the flow and return temperatures is recorded at 60-second intervals and an energy measurement performed. At the same time, this determines the automatic change between heat and cold measurement. For example, the hybrid meter starts with heat measurement when the temperature difference is greater than 0 Kelvin and the flow temperature is above 20°C.

In a similar way, the meter switches to cold mode as soon as the water temperature in the flow line is lower than in the return line so that there is a negative temperature difference and the flow  temperature is less than 20°C. The volume of energy consumed is then calculated by the integrated electronic microchip (ASIC) from the measurements recorded and various constants for the flowing liquid (K factor). It is then shown on the LC display.