Grundfos Direct Sensor VFD

The digital VFD Grundfos Direct Sensors measure the temperature and the flow rate with a single measuring element and then transmit the measured values directly via the RESOL VBus® protocol.

Grundfos Direct Sensors can be used in aggressive media as well as in domestic water and thus are ideal for measuring the flow rate and the heat quantity in solar thermal and heating systems.

VFD 1 - 12L are designed for systems with low flow rates.

VFD 2 - 40L are designed for systems with higher flow rates.